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File 2 18th March 2010  BUGS 
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File 1  BUGS
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. 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).
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File 2 18th March 2010  BUGS
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
There are several changes and bug fixes.
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
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
Files 5 and 6 13th April 2010These 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.
Files 7 and 8 13th April 2010  BUGS  INCORRECT APERTURES  INCORRECT LOW ENERGY CUTOFFALL 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 CUTOFFLike 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 CUTOFFCORRECTION 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
Files 13 and 14 16th April 2010CORRECTION 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).
Files 15 and 16 27th April 2010Swapped 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.
