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Results from PP/JAI web retrieved at 18:39 (+0100)

BPM requirements in CLIC This page will discuss the CLIC BPM requirements from Beam Dynamics. The CDR states an accuracy / resolution of 5 ...
Beam position monitors BPM introduction Stewart`s BPM handbook BPM paper library Other online resources to cavity BPMs (A. Lyapin) waveform processing...
Connecting to the technical network ssh XY username #64;lxplus.cern.ch ssh XY username #64;cs ccr dev1.cern.ch Acquisition Scripts It is best to open the signals...
Cavity A BPM A Reference Position Frequency /GHz 15.3099 14.9809 Internal Q 1235 1362 External Q 2156 2236 Loaded Q...
Average Position Measurement When the multibunch signal reaches a steady state, a phase advance is seen every sample that is proportional to the bunch separation....
Theoretical Investigation of Multiple Bunch Signals The multiple bunch signal was simulated from simply adding decaying complex oscillators at the separation of the...
Pictures of BPM installation in CLEX Close up of joint of stainless steel and copper BPM
CERN Network Links These links can only be accessed from the CERN network. eLogbook FEC Sync
Clic BPM electronics First electronics design for CTF3 tests electronics as per CDR components shortlist LO source Attenuator control board BPMDigitallyControlledAt...
Cavity A Summary BPM A Reference Position Frequency /GHz 15.3099 14.9809 Internal Q 1235 1362 External Q 2156 2236...
Cavity B BPM A Reference Position Frequency /GHz 15.182 14.980 Internal Q 1133 1338 External Q 1851 2341 Loaded Q...
Cavity C Summary BPM A Reference Position Frequency /GHz 15.265 14.987 Internal Q 1212 1218 External Q 1885 2725 Loaded...
Cavity D Summary BPM A Reference Position Frequency /GHz 15.327 14.983 Internal Q 1161 1259 External Q 1762 2110 Loaded...
Reference Cavity The BPM was connected to 2 ports of the VNA and S parameters were measured. Vacuum seals were used this time. Monopole Mode S Parameter...
CTF3 Cavity Pick up to Waveguide Spacing Cross Coupling The separation between the pick up in port number 2 and the wall of the waveguide was varied. The curve for...
Digitiser Measurements Noise measurements taken over time while changing the sensitivity of the digitiser: This suggests a minimum measurable noise of...
RF Diode Detector Measurements Diode Power Output Power sweeps for the two Schottky diode detectors, 201S (left) and 301S (right). The sweeps were performed...
Electronics Inventory Component Description Distributer Manufacturer Quantity ordered Quantity arrived Tested 130450 HMC941LP4E Digitally controlled...
Full Down Converter Measurements Time Domain Summary From top left: 20 dB coupler output after the mixer; time domain output after IF; output...
Electronics Measurements Low noise Amplifiers The frequency response of the low noise amplifier was measured. The response with 200 MHz was also measured. The...
Feedthrough Simulations The results of the RF measurements showed that the external Q of the BPM was much higher than anticipated. A study was done to reduce...
Preliminary Simulation The geometry below was simulated with CST, where the return loss was monitored and the level and the resonant frequency of the signal was...
Compression Measurements The following measurements where taken on channel 1 of protoype box 1. The attenuation of the cables is taken into account, 5....
Systematic Downconverter Measurements The attenuation of the cables, both RF and IF parts, has been removed from the following plots. At 15 GHz the attenuation...
IF Filter Design Information This bandpass filter design is based on a LP321010 prototype which has maximum ringing of 1% outside the defined time and frequency...
2013/02/14 First Signals 2013/02/15 Vertical Corrector Scan 2013/02/18 Horizontal, Vertical and Pulse Length Scans 2013/02/19 Pulse Scans...
Metrology Reports Body (Position Cavity) Body (Position Cavity) Radius Body (Position Cavity) Body (Position Cavity) Radius Body (Reference...
Metrology Results from DMP Technical drawings contain the relevant number for each metrological measurement. Position Cavity Upstream Body piece 1...
Numerical Analysis of the Fundamental Frequencies This is a method of measuring the frequency with higher resolution than with just a standard discrete fourier transform...
Clock Jitter limit on resolution. The 75 MHz clock signal at CTF was measured for it`s clock jitter using a spectrum analyser with a phase noise measurement function...
Electronics Stock Check Component Description Distributer Manufacturer Quantity ordered Quantity arrived Tested CBPF 15000 300 4 R...
Reference Cavity The dimensions of the first copper prototype were known to be incorrect. Predicting a frequency drop of ~330 MHz and a loaded Q drop of 160....
Position Cavity Waveguide Geometry To improve simulation time, the coaxials were ignored and the waveguide end cut short with ports added at the end of the waveguide...
Measurement of RF Generator for PLL NOTE 18.04.2016: Fermilab electronics are configured for LSB rejection, so for normal operation RF LO !!! RF...
Signal Processing Simulation Parameters General Parameter Value Bunches per train 150 Bunch separation/ns 0.667 Multiple bunch charge/nC/bunch...
Feedthrough Antenna Design with Bead The coupler was redesigned so that the antenna is now in the middle of the waveguide. Other dimensions are: Dimension Design...
Coupler Position Simulations The full geometry of the position cavity was used in a lossy eigenmode computation to simulate the effects of moving the coupler. The...
Electronics Simulation RF Filter Sweeps of the RF filter bandwidth were simulated to see the effect on the signal to noise ratio, the signal rise time and the maximum...
Support Stock Check Drawing No. Description Quantity Received Comments CLIBPMMA0013 Targets Support 3 Checked Quantity CLIBPMMA...
CTF3 layout layout beam schematic girder layout (details of available space) CALIFES Beam Parameters The following parameters are taken from et al...
Measurements of the Brazed Assembly The assembly was brazed and the feedthroughs were fitted with dowel pins and vacuum seals. The following measurements were then...
Modified Reference Cavity Measurements at CERN The signal was excited using a weakly coupled probe and measured from the output feedthroughs. We only had one spacer...
Dipole mode measurement Unloaded Port4 antenna Port3 coupler 2 All other ports covered with foil %$Q$% 310 %$f 0$% 14995 BW...
Design Notes Mechanical design Cavity is split in two which could create problems in terms of alignment of the two halves Simulations may be required in...
Cavity Sensitivity Estimates Position Cavity The dipole mode sensitivity was estimated from the following formula, the measured external quality factor of 617 and...
15 GHz CLIC Cavity BPM Second Generation First Generation Drawings and models Assembly STEP File Mechanical drawings of the second prototype Manufacture...
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Results from PP/Public web retrieved at 18:39 (+0100)

My Pages CLIC Cavity BPM CLIC Cavity BPM Second Generation Logbooks Logbook
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Physics WebpagesRHUL WebpagesCampus Connect • Royal Holloway, University of London, Egham, Surrey TW20 0EX; Tel/Fax +44 (0)1784 434455/437520

 
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