

META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
The number of primaries used to generate this file was N_p = 7.65E5 by repeating a sample of 3.75E4 halo electrons.  
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (4.96 +/ 0.12)E5. Assuming 2E10 particles per bunch, and a halo population factor of 1E3, there are 991 +/ 24 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  > >  The number of muons/antimuons per primary halo particle hitting the sampler at the exit of QF1 is (4.96 +/ 0.12)E5. Assuming 2E10 particles per bunch, and a halo population factor of 1E3, there are 991 +/ 24 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).    
The number of primaries used to generate this file was N_p = 7.6E5 by repeating a sample of 3.75E4 halo muons.  
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (4.86 +/ 0.11)E5. Assuming 2E10 particles per bunch, and a halo population factor of 1E3, there are 972 +/ 21 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  > >  The number of muons/antimuons per primary halo particle hitting the sampler at the exit of QF1 is (4.86 +/ 0.11)E5. Assuming 2E10 particles per bunch, and a halo population factor of 1E3, there are 972 +/ 21 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).   

META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
History  
< <  OldFiles  > >  OldFiles  click here  
Files 13 and 14 16th April 2010    
> > 
NOTE
A bug meant that in all the previous files a sample of only a few hundred halo electrons was used. This has now been fixed and 37500 halo electrons are used in the files below.
Current files
Files 17 and 18 2nd February 2011
These files were generated using the same simulation as files 13 and 14. The statistics are increased, and a sample of 37500 halo electrons was used, instead of just a few hundred. The muons were recorded at a plane at the exit of QF1.
The number of primaries used to generate this file was N_p = 7.65E5 by repeating a sample of 3.75E4 halo electrons.
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (4.96 +/ 0.12)E5. Assuming 2E10 particles per bunch, and a halo population factor of 1E3, there are 991 +/ 24 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
Files 19 and 20 2nd February 2011
Here, the spoiler geometries are updated to the latest designs, as presented in WEPEB046, "Optimisation of the CLIC baseline collimation system", in the Proceedings of IPAC '10, Kyoto, Japan. The magnet settings, however, remain unchanged. Work is ongoing to include the optics optimisation in the simulation.
The number of primaries used to generate this file was N_p = 7.6E5 by repeating a sample of 3.75E4 halo muons.
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (4.86 +/ 0.11)E5. Assuming 2E10 particles per bunch, and a halo population factor of 1E3, there are 972 +/ 21 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
 

META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM    
> > 
<
Settings just to customise this page
>  
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1" date="1269960724" name="muons_e_30_03.txt" path="muons_e_30_03.txt" size="1398208" stream="muons_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
Overview  
< <  BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 T eV electrons and positrons as the primary particles (halo distribution files generated by H. Burkhardt at CERN using htgen). Files with known problems have "BUGS" in the title, and should not be used.  > >  BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 T eV electrons and positrons as the primary particles (halo distribution files generated by H. Burkhardt at CERN using htgen).  
Data Files  
< <  File 1  BUGS
 muons_e_1500GeV.dat: Muons at the entrance to QD0 from 1500 G eV halo electrons hitting YSP1. File format:
   
< <  Energy[GeV] x[m] y[m] x' y' partID z0[m] weight
Energy is the energy of the particle in G eV. x and y are the positions of the particle from the reference trajectory in metres. x' and y' are the normalised components of the momentum vector along the two axes. partID is the PDG particle code (for muons, partID=13, for antimuons partID=13). z0 is the position along the z axis of the last interaction of the particle. weight is the weight factor, which depends upon the cross section biasing factor of the process in which the particle was generated and the weight of the parent particle.  > >  Processes and biasing  
At 1.5 T eV, the dominant process is gamma> mu mu+ and electron positron annihilation can be ignored. Therefore electrons incident and positrons incident produce similar numbers of muons.  
< <  The number of primaries used to generate this file was N_p = 51232, with the cross sections weighted by the following factors:  > >  The following cross section biasing was used:  
gamma > muons: 1e4  
< <  annihilation > muons: 1e6
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.949 +/ 0.033) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 389.8 +/ 6.6 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).    
> >  annihilation > muons: 1e4    
< <  <
Settings just to customise this page
>  > >  File formats    
< <  File 2 18th March 2010  BUGS  > >  Format 1    
< <   
x' y' z' x[mum] y[mum] z[m] charge[e] energy[GeV]
Energy is the energy of the particle in G eV. x and y are the positions of the particle from the reference trajectory in mum. x' y' and z' are the normalised components of the momentum vector along the three axes.  
< <  At 1.5 T eV, the dominant process is gamma> mu mu+ and electron positron annihilation can be ignored. Therefore electrons incident and positrons incident produce similar numbers of muons.
The number of primaries used to generate this file was N_p = 46569, with the cross sections weighted by the following factors:
gamma > muons: 1e4
annihilation > muons: 1e4
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.616 +/ 0.012) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 323.2 +/ 2.4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
File 3 30th March 2010
 muons_e_30_03.txt: Muons at the exit of QF1 (~3m upstream of the entrance to the final quadrupole QD0) from 1.5 T eV halo electrons hitting YSP1.
There are several changes and bug fixes.
 The beam line is now based on the latest MAD deck, v_10_01_25.
 A problem with the interface between the HTGEN output and BDSIM has been resolved.
 The width of the samplers has been increased.
The file format and cross section biasing are the same as for file 2.
The number of primaries used to generate this file was N_p = 30789
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (5.98+/0.04) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 1196 +/ 8 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
File 4 30th March 2010  BUGS
===CORRECTION 9th April 2010===
* muons_swap_e_30_03.txt: Muons at the exit of magnet QF1 from 1.5 T eV halo electrons hitting first vertical spoiler ysp1. Betatron and energy collimation section ordering is reversed.
This file was created under the same conditions as file 3, with the exception that the energy and betatron collimation sections are swapped. Therefore, muons created in the betatron collimation section have further to travel in order to reach the detector.
To swap the collimation sections the following line in the MAD file is changed:
noentrcolsys: line:=(sentr,trans1,nlcecoll,trans2,etbcoll, sexit, trans3,nlcbcoll,trans4,btff, trans5);
is changed to
noentrcolsysswap: line:=(sentr,trans1,etbcoll,trans2, nlcbcoll,sexit,trans3,nlcecoll,trans4,btff, trans5);
This keeps approximately the correct beam size at the IP (sigma x 39 nm > 45 nm, sigma y remains at 1nm) while swapping the ordering of the betatron collimation section (nlcbcoll) and the energy collimation section (nlcecoll).
The number of primaries used to generate this file was N_p = 30386
Below is an outline file showing the layout.
* swap_v1_outline.txt: All components, positions and settings for the swapped beam line, v1
===CORRECTION 9th April 2010===
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (9.77 +/ 0.11) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 195 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~84% reduction compared to file 3.
Files 5 and 6 13th April 2010  > >  Format 2    
< <  These are identical to files 3 and 4 but with additional columns:  > >  Format 2 has two additional columns:    
< <  z0[m] weight (see File 1 for explaination).  > >  x' y' z' x[mum] y[mum] z[m] charge[e] energy[GeV] z0[m] weight    
< <  ~1% of the muons are produced by gamma > mu+ mu from gammas emitted by muons and therefore have a weight of 1e4*1e4 = 1e8.  > >  z0 is the position along the z axis of the last interaction of the particle. weight is the weight factor, which depends upon the cross section biasing factor of the process in which the particle was generated and the weight of the parent particle.    
> >  History    
< < 
Files 7 and 8 13th April 2010  BUGS  INCORRECT APERTURES  INCORRECT LOW ENERGY CUTOFF
ALL APERTURES WERE 8mm APART FROM THE COLLIMATORS
The same as File 4 but with an improved swapped collimation sections beam delivery system layout (layout produced by Rogelio Garcia). The files are in two different formats. Format 1 is the same format as Files 3 and 4. Format 2 is the same format as Files 5 and 6 and contains extra data columns (z0, weight).
The number of primaries used to generate this file was N_p = 14912
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.37 +/ 0.05) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 27 +/ 1 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~98% reduction compared to file 3.
Files 9 and 10 14th April 2010 BUGS  INCORRECT LOW ENERGY CUTOFF
Like files 7 and 8 but with the correct apertures.
The number of primaries used to generate this file was N_p = 18600
CORRECTION 16th April 2010
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.50 +/ 0.22) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 50 +/ 4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~96% reduction compared to file 3.
Below is an outline file showing the layout for files 7, 8 ,9 and 10.
* swap_v2_outline.txt: All components, positions and settings for the swapped beam line, v2
Files 11 and 12 16th April 2010  BUGS  INCORRECT LOW ENERGY CUTOFF
CORRECTION 16th April 2010 Files 3  10 did not start at the first spoiler but 57.42 metres upstream, at the start of the betatron collimation section (see outline files above).
Corrected muon and outline files are below. These are the same as files 9 and 10 but with the correct starting position.
The number of primaries used to generate this file was N_p = 14479
CORRECTION 16th April 2010
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.10 +/ 0.14) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 44 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
CORRECTION 20 April 2010  the wrong files were attached
 > >  OldFiles  
Files 13 and 14 16th April 2010  
< <  CORRECTION 16th April 2010 Files 3  10 did not start at the first spoiler but 57.42 metres upstream, at the start of the betatron collimation section (see outline files above).
Corrected muon and outline files are below. Original collimation layout.   The number of primaries used to generate this file was N_p = 30130  
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (5.56 +/ 0.01) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 1113 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  > >  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (5.56 +/ 0.01) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 1113 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).    
Files 15 and 16 27th April 2010  
< <  Swapped layout. Correct 500 Me V low energy cutoff for electrons, positrons and photons.  > >  Swapped layout.  
The number of primaries used to generate this file was N_p = 12059  
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.274 +/ 0.09) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 455 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a 41% reduction compared to file 13.  > >  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.274 +/ 0.09) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 455 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a 41% reduction compared to file 13.   

META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM   The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (5.98+/0.04) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 1196 +/ 8 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  
< <  File 4 30th March 2010  > >  File 4 30th March 2010  BUGS  
===CORRECTION 9th April 2010===
* muons_swap_e_30_03.txt: Muons at the exit of magnet QF1 from 1.5 T eV halo electrons hitting first vertical spoiler ysp1. Betatron and energy collimation section ordering is reversed.    
< <   > >     
< <  Files 7 and 8 13th April 2010  INCORRECT APERTURES  > >  Files 7 and 8 13th April 2010  BUGS  INCORRECT APERTURES  INCORRECT LOW ENERGY CUTOFF  
ALL APERTURES WERE 8mm APART FROM THE COLLIMATORS   The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.37 +/ 0.05) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 27 +/ 1 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~98% reduction compared to file 3.  
< <  Files 9 and 10 14th April 2010  > >  Files 9 and 10 14th April 2010 BUGS  INCORRECT LOW ENERGY CUTOFF  
Like files 7 and 8 but with the correct apertures.   * swap_v2_outline.txt: All components, positions and settings for the swapped beam line, v2  
< <  Files 11 and 12 16th April 2010  > >  Files 11 and 12 16th April 2010  BUGS  INCORRECT LOW ENERGY CUTOFF  
CORRECTION 16th April 2010 Files 3  10 did not start at the first spoiler but 57.42 metres upstream, at the start of the betatron collimation section (see outline files above).    
> >  Files 15 and 16 27th April 2010    
> >  Swapped layout. Correct 500 Me V low energy cutoff for electrons, positrons and photons.  
 
> >  The number of primaries used to generate this file was N_p = 12059
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.274 +/ 0.09) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 455 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a 41% reduction compared to file 13.
 
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
 
META FILEATTACHMENT 
attachment="corrected_outline.txt" attr="" comment="Outline of BDS from first spoiler YSP1" date="1271423350" name="corrected_outline.txt" path="corrected_outline.txt" size="38104" stream="corrected_outline.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_swap_16_04_format2.txt" attr="" comment="" date="1271768865" name="muons_e_swap_16_04_format2.txt" path="muons_e_swap_16_04_format2.txt" size="28890" stream="muons_e_swap_16_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_swap_16_04_format1.txt" attr="" comment="" date="1271769029" name="muons_e_swap_16_04_format1.txt" path="muons_e_swap_16_04_format1.txt" size="24053" stream="muons_e_swap_16_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_swap_e_27_04_format1.txt" attr="" comment="" date="1272384001" name="muons_swap_e_27_04_format1.txt" path="muons_swap_e_27_04_format1.txt" size="209411" stream="muons_swap_e_27_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_27_04_format2.txt" attr="" comment="Corrected low energy cutoff for electrons, positrons and photons." date="1272384031" name="muons_swap_e_27_04_format2.txt" path="muons_swap_e_27_04_format2.txt" size="250768" stream="muons_swap_e_27_04_format2.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM   CORRECTION 16th April 2010
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.10 +/ 0.14) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 44 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  
< <   > >  CORRECTION 20 April 2010  the wrong files were attached
   
< <     
META FILEATTACHMENT 
attachment="muons_swap_e_16_04_format1.txt" attr="" comment="" date="1271423126" name="muons_swap_e_16_04_format1.txt" path="muons_swap_e_16_04_format1.txt" size="35169" stream="muons_swap_e_16_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_16_04_format2.txt" attr="" comment="" date="1271423137" name="muons_swap_e_16_04_format2.txt" path="muons_swap_e_16_04_format2.txt" size="1536307" stream="muons_swap_e_16_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="corrected_outline.txt" attr="" comment="Outline of BDS from first spoiler YSP1" date="1271423350" name="corrected_outline.txt" path="corrected_outline.txt" size="38104" stream="corrected_outline.txt" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_e_swap_16_04_format2.txt" attr="" comment="" date="1271768865" name="muons_e_swap_16_04_format2.txt" path="muons_e_swap_16_04_format2.txt" size="28890" stream="muons_e_swap_16_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_swap_16_04_format1.txt" attr="" comment="" date="1271769029" name="muons_e_swap_16_04_format1.txt" path="muons_e_swap_16_04_format1.txt" size="24053" stream="muons_e_swap_16_04_format1.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM   * muons_swap_e_30_03.txt: Muons at the exit of magnet QF1 from 1.5 T eV halo electrons hitting first vertical spoiler ysp1. Betatron and energy collimation section ordering is reversed.
 
< <  This file was created under the same conditions as file 4, with the exception that the energy and betatron collimation sections are swapped. Therefore, muons created in the betatron collimation section have further to travel in order to reach the detector.  > >  This file was created under the same conditions as file 3, with the exception that the energy and betatron collimation sections are swapped. Therefore, muons created in the betatron collimation section have further to travel in order to reach the detector.  
To swap the collimation sections the following line in the MAD file is changed:  
The number of primaries used to generate this file was N_p = 18600  
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.25 +/ 0.11) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 25 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~98% reduction compared to file 3.  > >  CORRECTION 16th April 2010
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.50 +/ 0.22) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 50 +/ 4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~96% reduction compared to file 3.  
Below is an outline file showing the layout for files 7, 8 ,9 and 10.  
Files 11 and 12 16th April 2010
 
< <  CORRECTION Files 3  10 did not start at the first spoiler but 57.42 metres upstream, at the start of the betatron collimation section (see outline files above).  > >  CORRECTION 16th April 2010 Files 3  10 did not start at the first spoiler but 57.42 metres upstream, at the start of the betatron collimation section (see outline files above).  
Corrected muon and outline files are below. These are the same as files 9 and 10 but with the correct starting position.
The number of primaries used to generate this file was N_p = 14479  
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.10 +/ 0.07) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 22 +/ 1 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  > >  CORRECTION 16th April 2010
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (2.10 +/ 0.14) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 44 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).    
< <   > >     
< <   > >   
 
> >  Files 13 and 14 16th April 2010
CORRECTION 16th April 2010 Files 3  10 did not start at the first spoiler but 57.42 metres upstream, at the start of the betatron collimation section (see outline files above).
Corrected muon and outline files are below. Original collimation layout.
The number of primaries used to generate this file was N_p = 30130
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (5.56 +/ 0.01) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 1113 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
 
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1" date="1269960724" name="muons_e_30_03.txt" path="muons_e_30_03.txt" size="1398208" stream="muons_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
 
META FILEATTACHMENT 
attachment="swap_v2_outline.txt" attr="" comment="All components, positions and settings for the swapped beam line, v2" date="1271409659" name="swap_v2_outline.txt" path="swap_v2_outline.txt" size="68880" stream="swap_v2_outline.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="swap_v2_corrected_outline.txt" attr="" comment="All components, positions and settings for the swapped beam line, v2. Corrected layout, starting at YSP1." date="1271410153" name="swap_v2_corrected_outline.txt" path="swap_v2_corrected_outline.txt" size="67767" stream="swap_v2_corrected_outline.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="CLIC_bds_swap_from_ysp1.eps" attr="" comment="A diagram showing locations of components along the beam line. The betratron spoilers are omitted." date="1271413076" name="CLIC_bds_swap_from_ysp1.eps" path="CLIC_bds_swap_from_ysp1.eps" size="98788" stream="CLIC_bds_swap_from_ysp1.eps" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_e_16_04_format1.txt" attr="" comment="" date="1271423060" name="muons_e_16_04_format1.txt" path="muons_e_16_04_format1.txt" size="1281819" stream="muons_e_16_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_16_04_format2.txt" attr="" comment="" date="1271423076" name="muons_e_16_04_format2.txt" path="muons_e_16_04_format2.txt" size="1536307" stream="muons_e_16_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_16_04_format1.txt" attr="" comment="" date="1271423126" name="muons_swap_e_16_04_format1.txt" path="muons_swap_e_16_04_format1.txt" size="35169" stream="muons_swap_e_16_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_16_04_format2.txt" attr="" comment="" date="1271423137" name="muons_swap_e_16_04_format2.txt" path="muons_swap_e_16_04_format2.txt" size="1536307" stream="muons_swap_e_16_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="corrected_outline.txt" attr="" comment="Outline of BDS from first spoiler YSP1" date="1271423350" name="corrected_outline.txt" path="corrected_outline.txt" size="38104" stream="corrected_outline.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
The number of primaries used to generate this file was N_p = 30386  
> >  Below is an outline file showing the layout.
* swap_v1_outline.txt: All components, positions and settings for the swapped beam line, v1   ===CORRECTION 9th April 2010===
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (9.77 +/ 0.11) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 195 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~84% reduction compared to file 3.
 
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.25 +/ 0.11) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 25 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~98% reduction compared to file 3.  
< <  ====================================  > >  Below is an outline file showing the layout for files 7, 8 ,9 and 10.
* swap_v2_outline.txt: All components, positions and settings for the swapped beam line, v2
Files 11 and 12 16th April 2010
CORRECTION Files 3  10 did not start at the first spoiler but 57.42 metres upstream, at the start of the betatron collimation section (see outline files above).
Corrected muon and outline files are below. These are the same as files 9 and 10 but with the correct starting position.
The number of primaries used to generate this file was N_p = 14479
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.10 +/ 0.07) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 22 +/ 1 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
 
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03_format2.txt" attr="" comment="extra data z0, weight" date="1271156461" name="muons_swap_e_30_03_format2.txt" path="muons_swap_e_30_03_format2.txt" size="541816" stream="muons_swap_e_30_03_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_12_04_format1.txt" attr="" comment="Improved swapped BDS layout (layout produced by Rogelio Garcia). Format 1." date="1271171969" name="muons_swap_e_12_04_format1.txt" path="muons_swap_e_12_04_format1.txt" size="15654" stream="muons_swap_e_12_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_12_04_format2.txt" attr="" comment="Improved swapped BDS layout (layout produced by Rogelio Garcia). Format 2." date="1271171999" name="muons_swap_e_12_04_format2.txt" path="muons_swap_e_12_04_format2.txt" size="18754" stream="muons_swap_e_12_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
 
< < 
META FILEATTACHMENT 
attachment="muons_swap_e_14_04_format1.txt" attr="" comment="Apertures correction" date="1271249850" name="muons_swap_e_14_04_format1.txt" path="muons_swap_e_14_04_format1.txt" size="35169" stream="muons_swap_e_14_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_14_04_format2.txt" attr="" comment="Apertures correction." date="1271249886" name="muons_swap_e_14_04_format2.txt" path="muons_swap_e_14_04_format2.txt" size="42144" stream="muons_swap_e_14_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
 > > 
META FILEATTACHMENT 
attachment="muons_swap_e_14_04_format1.txt" attr="" comment="Corrected layout. Starting at YSP1 (first spoiler)" date="1271410091" name="muons_swap_e_14_04_format1.txt" path="muons_swap_e_14_04_format1.txt" size="35169" stream="muons_swap_e_14_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_14_04_format2.txt" attr="" comment="Corrected layout. Starting at YSP1 (first spoiler)" date="1271410109" name="muons_swap_e_14_04_format2.txt" path="muons_swap_e_14_04_format2.txt" size="42144" stream="muons_swap_e_14_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="swap_v1_outline.txt" attr="" comment="All components, positions and settings for the swapped beam line, v1" date="1271409635" name="swap_v1_outline.txt" path="swap_v1_outline.txt" size="65491" stream="swap_v1_outline.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="swap_v2_outline.txt" attr="" comment="All components, positions and settings for the swapped beam line, v2" date="1271409659" name="swap_v2_outline.txt" path="swap_v2_outline.txt" size="68880" stream="swap_v2_outline.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="swap_v2_corrected_outline.txt" attr="" comment="All components, positions and settings for the swapped beam line, v2. Corrected layout, starting at YSP1." date="1271410153" name="swap_v2_corrected_outline.txt" path="swap_v2_corrected_outline.txt" size="67767" stream="swap_v2_corrected_outline.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="CLIC_bds_swap_from_ysp1.eps" attr="" comment="A diagram showing locations of components along the beam line. The betratron spoilers are omitted." date="1271413076" name="CLIC_bds_swap_from_ysp1.eps" path="CLIC_bds_swap_from_ysp1.eps" size="98788" stream="CLIC_bds_swap_from_ysp1.eps" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM    
< <  Files 7 and 8 13th April 2010  > >  Files 7 and 8 13th April 2010  INCORRECT APERTURES
ALL APERTURES WERE 8mm APART FROM THE COLLIMATORS  
The same as File 4 but with an improved swapped collimation sections beam delivery system layout (layout produced by Rogelio Garcia). The files are in two different formats. Format 1 is the same format as Files 3 and 4. Format 2 is the same format as Files 5 and 6 and contains extra data columns (z0, weight).  
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.37 +/ 0.05) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 27 +/ 1 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~98% reduction compared to file 3.  
> > 
Files 9 and 10 14th April 2010
Like files 7 and 8 but with the correct apertures.
The number of primaries used to generate this file was N_p = 18600
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.25 +/ 0.11) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 25 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~98% reduction compared to file 3.
====================================  
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1" date="1269960724" name="muons_e_30_03.txt" path="muons_e_30_03.txt" size="1398208" stream="muons_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03_format2.txt" attr="" comment="extra data z0, weight" date="1271156461" name="muons_swap_e_30_03_format2.txt" path="muons_swap_e_30_03_format2.txt" size="541816" stream="muons_swap_e_30_03_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_12_04_format1.txt" attr="" comment="Improved swapped BDS layout (layout produced by Rogelio Garcia). Format 1." date="1271171969" name="muons_swap_e_12_04_format1.txt" path="muons_swap_e_12_04_format1.txt" size="15654" stream="muons_swap_e_12_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_12_04_format2.txt" attr="" comment="Improved swapped BDS layout (layout produced by Rogelio Garcia). Format 2." date="1271171999" name="muons_swap_e_12_04_format2.txt" path="muons_swap_e_12_04_format2.txt" size="18754" stream="muons_swap_e_12_04_format2.txt" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_swap_e_14_04_format1.txt" attr="" comment="Apertures correction" date="1271249850" name="muons_swap_e_14_04_format1.txt" path="muons_swap_e_14_04_format1.txt" size="35169" stream="muons_swap_e_14_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_14_04_format2.txt" attr="" comment="Apertures correction." date="1271249886" name="muons_swap_e_14_04_format2.txt" path="muons_swap_e_14_04_format2.txt" size="42144" stream="muons_swap_e_14_04_format2.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM    
> >  Files 7 and 8 13th April 2010
The same as File 4 but with an improved swapped collimation sections beam delivery system layout (layout produced by Rogelio Garcia). The files are in two different formats. Format 1 is the same format as Files 3 and 4. Format 2 is the same format as Files 5 and 6 and contains extra data columns (z0, weight).
The number of primaries used to generate this file was N_p = 14912
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.37 +/ 0.05) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 27 +/ 1 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~98% reduction compared to file 3.  
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1" date="1269960724" name="muons_e_30_03.txt" path="muons_e_30_03.txt" size="1398208" stream="muons_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03.txt" attr="" comment="Same as file 3 but with 'swapped' collimation sections" date="1270814365" name="muons_swap_e_30_03.txt" path="muons_swap_e_30_03.txt" size="452646" stream="muons_swap_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_30_03_format2.txt" attr="" comment="extra data z0, weight" date="1271156425" name="muons_e_30_03_format2.txt" path="muons_e_30_03_format2.txt" size="1675495" stream="muons_e_30_03_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03_format2.txt" attr="" comment="extra data z0, weight" date="1271156461" name="muons_swap_e_30_03_format2.txt" path="muons_swap_e_30_03_format2.txt" size="541816" stream="muons_swap_e_30_03_format2.txt" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_swap_e_12_04_format1.txt" attr="" comment="Improved swapped BDS layout (layout produced by Rogelio Garcia). Format 1." date="1271171969" name="muons_swap_e_12_04_format1.txt" path="muons_swap_e_12_04_format1.txt" size="15654" stream="muons_swap_e_12_04_format1.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_12_04_format2.txt" attr="" comment="Improved swapped BDS layout (layout produced by Rogelio Garcia). Format 2." date="1271171999" name="muons_swap_e_12_04_format2.txt" path="muons_swap_e_12_04_format2.txt" size="18754" stream="muons_swap_e_12_04_format2.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
 A problem with the interface between the HTGEN output and BDSIM has been resolved.
 The width of the samplers has been increased.
 
< <  The file format and cross section biasing are the same as for file 3.  > >  The file format and cross section biasing are the same as for file 2.  
The number of primaries used to generate this file was N_p = 30789   The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (9.77 +/ 0.11) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 195 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~84% reduction compared to file 3.
 
> >  Files 5 and 6 13th April 2010    
> >  These are identical to files 3 and 4 but with additional columns:    
> >  z0[m] weight (see File 1 for explaination).
~1% of the muons are produced by gamma > mu+ mu from gammas emitted by muons and therefore have a weight of 1e4*1e4 = 1e8.
 
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1" date="1269960724" name="muons_e_30_03.txt" path="muons_e_30_03.txt" size="1398208" stream="muons_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03.txt" attr="" comment="Same as file 3 but with 'swapped' collimation sections" date="1270814365" name="muons_swap_e_30_03.txt" path="muons_swap_e_30_03.txt" size="452646" stream="muons_swap_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_e_30_03_format2.txt" attr="" comment="extra data z0, weight" date="1271156425" name="muons_e_30_03_format2.txt" path="muons_e_30_03_format2.txt" size="1675495" stream="muons_e_30_03_format2.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03_format2.txt" attr="" comment="extra data z0, weight" date="1271156461" name="muons_swap_e_30_03_format2.txt" path="muons_swap_e_30_03_format2.txt" size="541816" stream="muons_swap_e_30_03_format2.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM    
< <  x'[rad] y'[rad] z'[rad] x[mum] y[mum] z[m] charge[e] energy[GeV]  > >  x' y' z' x[mum] y[mum] z[m] charge[e] energy[GeV]  
Energy is the energy of the particle in G eV. x and y are the positions of the particle from the reference trajectory in mum. x' y' and z' are the normalised components of the momentum vector along the three axes. 

META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
File 4 30th March 2010  
> >  ===CORRECTION 9th April 2010===   * muons_swap_e_30_03.txt: Muons at the exit of magnet QF1 from 1.5 T eV halo electrons hitting first vertical spoiler ysp1. Betatron and energy collimation section ordering is reversed.  
> > 
 
This file was created under the same conditions as file 4, with the exception that the energy and betatron collimation sections are swapped. Therefore, muons created in the betatron collimation section have further to travel in order to reach the detector.  
The number of primaries used to generate this file was N_p = 30386  
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.95 +/ 0.01) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 390 +/ 4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~70% reduction compared to file 3.  > >  ===CORRECTION 9th April 2010===
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (9.77 +/ 0.11) X 10^(6). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 195 +/ 2 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~84% reduction compared to file 3.
 
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1" date="1269960724" name="muons_e_30_03.txt" path="muons_e_30_03.txt" size="1398208" stream="muons_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
 
< < 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1. Betatron and energy collimation section ordering is reversed." date="1269961373" name="muons_swap_e_30_03.txt" path="muons_swap_e_30_03.txt" size="1398208" stream="muons_swap_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
 > > 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03.txt" attr="" comment="Same as file 3 but with 'swapped' collimation sections" date="1270814365" name="muons_swap_e_30_03.txt" path="muons_swap_e_30_03.txt" size="452646" stream="muons_swap_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.616 +/ 0.012) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 323.2 +/ 2.4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  
< <  File 3 30th March 2010 UNDER CONSTRUCTION  > >  File 3 30th March 2010    
< <  There are several changes and bug fixes. Firstly, the deck is now based on the latest MAD deck, v_10_01_25. A problem with the interface between the HTGEN output and BDSIM has been resolved. The width of the samplers has been increased.  > > 
 muons_e_30_03.txt: Muons at the exit of QF1 (~3m upstream of the entrance to the final quadrupole QD0) from 1.5 T eV halo electrons hitting YSP1.
There are several changes and bug fixes.
 The beam line is now based on the latest MAD deck, v_10_01_25.
 A problem with the interface between the HTGEN output and BDSIM has been resolved.
 The width of the samplers has been increased.
 
The file format and cross section biasing are the same as for file 3.
 
< <  The number of primaries used to generate this file was N_p =  > >  The number of primaries used to generate this file was N_p = 30789
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (5.98+/0.04) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 1196 +/ 8 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
File 4 30th March 2010
* muons_swap_e_30_03.txt: Muons at the exit of magnet QF1 from 1.5 T eV halo electrons hitting first vertical spoiler ysp1. Betatron and energy collimation section ordering is reversed.
This file was created under the same conditions as file 4, with the exception that the energy and betatron collimation sections are swapped. Therefore, muons created in the betatron collimation section have further to travel in order to reach the detector.
To swap the collimation sections the following line in the MAD file is changed:
noentrcolsys: line:=(sentr,trans1,nlcecoll,trans2,etbcoll, sexit, trans3,nlcbcoll,trans4,btff, trans5);
is changed to    
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is () X 10^(). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  > >  noentrcolsysswap: line:=(sentr,trans1,etbcoll,trans2, nlcbcoll,sexit,trans3,nlcecoll,trans4,btff, trans5);    
> >  This keeps approximately the correct beam size at the IP (sigma x 39 nm > 45 nm, sigma y remains at 1nm) while swapping the ordering of the betatron collimation section (nlcbcoll) and the energy collimation section (nlcecoll).    
< <  File 4 30th March 2010 UNDER CONSTRUCTION    
< <  This file was created under the same conditions as file 4, with the exception that the ordering of the energy and betatron collimation sections have been reversed. Therefore, muons created in the betatron collimation section have further to travel in order to reach the detector.  > >  The number of primaries used to generate this file was N_p = 30386    
> >  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.95 +/ 0.01) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 390 +/ 4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean). This is a ~70% reduction compared to file 3.    
< <  The number of primaries used to generate this file was N_p =    
< <  The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is () X 10^(). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1" date="1269960724" name="muons_e_30_03.txt" path="muons_e_30_03.txt" size="1398208" stream="muons_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_swap_e_30_03.txt" attr="" comment="Muons at the exit of magnet QF1 from 1.5 TeV halo electrons hitting first vertical spoiler ysp1. Betatron and energy collimation section ordering is reversed." date="1269961373" name="muons_swap_e_30_03.txt" path="muons_swap_e_30_03.txt" size="1398208" stream="muons_swap_e_30_03.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
Overview  
< <  BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 T eV electrons and positrons as the primary particles (halo distribution files generated by H. Burkhardt at CERN using htgen).  > >  BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 T eV electrons and positrons as the primary particles (halo distribution files generated by H. Burkhardt at CERN using htgen). Files with known problems have "BUGS" in the title, and should not be used.  
Data Files  
< <  File 1  > >  File 1  BUGS  
 muons_e_1500GeV.dat: Muons at the entrance to QD0 from 1500 G eV halo electrons hitting YSP1. File format:
Energy[GeV] x[m] y[m] x' y' partID z0[m] weight  
 Set MYTITLE = CLIC Muon Background Simulation Using BDSIM
>  
< <  File 2 18th March 2010  > >  File 2 18th March 2010  BUGS    
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.616 +/ 0.012) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 323.2 +/ 2.4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  
> >  File 3 30th March 2010 UNDER CONSTRUCTION
There are several changes and bug fixes. Firstly, the deck is now based on the latest MAD deck, v_10_01_25. A problem with the interface between the HTGEN output and BDSIM has been resolved. The width of the samplers has been increased.
The file format and cross section biasing are the same as for file 3.
The number of primaries used to generate this file was N_p =
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is () X 10^(). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
File 4 30th March 2010 UNDER CONSTRUCTION
This file was created under the same conditions as file 4, with the exception that the ordering of the energy and betatron collimation sections have been reversed. Therefore, muons created in the betatron collimation section have further to travel in order to reach the detector.
The number of primaries used to generate this file was N_p =
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is () X 10^(). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM   BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 T eV electrons and positrons as the primary particles (halo distribution files generated by H. Burkhardt at CERN using htgen).
Data Files  
> >  File 1  
 muons_e_1500GeV.dat: Muons at the entrance to QD0 from 1500 G eV halo electrons hitting YSP1. File format:
 
< <  Energy[GeV] x[m] y[m] xp yp partID z0[m] weight  > >  Energy[GeV] x[m] y[m] x' y' partID z0[m] weight    
< <  Energy is the energy of the particle in G eV. x and y are the positions of the particle from the reference trajectory in metres. xp and yp are the normalised components of the momentum vector along the two axes. partID is the PDG particle code (for muons, partID=13, for antimuons partID=13). z0 is the position along the z axis of the last interaction of the particle. weight is the weight factor, which depends upon the cross section biasing factor of the process in which the particle was generated and the weight of the parent particle.  > >  Energy is the energy of the particle in G eV. x and y are the positions of the particle from the reference trajectory in metres. x' and y' are the normalised components of the momentum vector along the two axes. partID is the PDG particle code (for muons, partID=13, for antimuons partID=13). z0 is the position along the z axis of the last interaction of the particle. weight is the weight factor, which depends upon the cross section biasing factor of the process in which the particle was generated and the weight of the parent particle.  
At 1.5 T eV, the dominant process is gamma> mu mu+ and electron positron annihilation can be ignored. Therefore electrons incident and positrons incident produce similar numbers of muons.  
 Set MYTITLE = CLIC Muon Background Simulation Using BDSIM
>  
> >  File 2 18th March 2010
x'[rad] y'[rad] z'[rad] x[mum] y[mum] z[m] charge[e] energy[GeV]
Energy is the energy of the particle in G eV. x and y are the positions of the particle from the reference trajectory in mum. x' y' and z' are the normalised components of the momentum vector along the three axes.
At 1.5 T eV, the dominant process is gamma> mu mu+ and electron positron annihilation can be ignored. Therefore electrons incident and positrons incident produce similar numbers of muons.
The number of primaries used to generate this file was N_p = 46569, with the cross sections weighted by the following factors:
gamma > muons: 1e4
annihilation > muons: 1e4
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.616 +/ 0.012) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 323.2 +/ 2.4 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).  
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 
 
> > 
META FILEATTACHMENT 
attachment="muons_3m_upstream_qd0_e_1500GeV.txt" attr="" comment="Muons 3m upstream of the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268910989" name="muons_3m_upstream_qd0_e_1500GeV.txt" path="muons_3m_upstream_qd0_e_1500GeV.txt" size="1092563" stream="muons_3m_upstream_qd0_e_1500GeV.txt" user="Public.LawrenceDeacon" version="1" 


META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM  
Overview  
< <  BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 TeV electrons and positrons as the primary particles.  > >  BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 T eV electrons and positrons as the primary particles (halo distribution files generated by H. Burkhardt at CERN using htgen).    
< <  Preliminary Results and Data  > >  Data Files
 muons_e_1500GeV.dat: Muons at the entrance to QD0 from 1500 G eV halo electrons hitting YSP1. File format:
Energy[GeV] x[m] y[m] xp yp partID z0[m] weight
Energy is the energy of the particle in G eV. x and y are the positions of the particle from the reference trajectory in metres. xp and yp are the normalised components of the momentum vector along the two axes. partID is the PDG particle code (for muons, partID=13, for antimuons partID=13). z0 is the position along the z axis of the last interaction of the particle. weight is the weight factor, which depends upon the cross section biasing factor of the process in which the particle was generated and the weight of the parent particle.
At 1.5 T eV, the dominant process is gamma> mu mu+ and electron positron annihilation can be ignored. Therefore electrons incident and positrons incident produce similar numbers of muons.
The number of primaries used to generate this file was N_p = 51232, with the cross sections weighted by the following factors:
gamma > muons: 1e4
annihilation > muons: 1e6
The number of muons/antimuons per primary halo particle hitting the sampler at QD0 is (1.949 +/ 0.033) X 10^(5). Assuming 2 X 10^(10) particles per bunch, and a halo population factor of 10^(3), there are 389.8 +/ 6.6 muons/antimuons per bunch (here +/ is the statistical uncertainty in the estimate of the mean).
<
Settings just to customise this page
>
META FILEATTACHMENT 
attachment="muons_e_1500GeV.dat" attr="" comment="Muons at the entrance to QD0 from 1500 GeV halo electrons hitting YSP1." date="1268668406" name="muons_e_1500GeV.dat" path="muons_e_1500GeV.dat" size="3441073" stream="muons_e_1500GeV.dat" user="Public.LawrenceDeacon" version="1" 


> > 
META TOPICPARENT 
name="BdSim" 
CLIC Muon Background Simulation Using BDSIM
This is an ongoing project to simulate the muon flux into the CLIC detector due to beam halo collimation. All data presented here are provisional.
Overview
BDSIM gmad files were generated from the v_09_04_01 MAD decks, including all apertures. Cross checks were performed using core electron and positron distibutions. A tunnel geometry was created including a tunnel floor, beam line offset, concrete walls and surrounding soil. A tapered spoiler geometry was created. Relevant physics processes were turned on and cross section biased to reduce required computing time. The simulation was run on the RHUL grid farm with 1.5 TeV electrons and positrons as the primary particles.
Preliminary Results and Data 
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