RHUL Physics Department TWiki> PP/JAI Web>RFLab>BeamPosition>AtfBpmDigital>AtfBpmNewLogBook>AtfBpmNewLogBook_20130424 (24 Apr 2013, JsnuverinkSnuverink)
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ATF2 twiki

http://atf.kek.jp/twiki/bin/view/ATFlogbook/Log20130423d

Present: Young-Im, Stewart, Jochem

Plan: Wakefield study with new ref setup (1 ref. cavity) + BPM calibration

intensity scan with ref cavity

charge file streak pulses comment
0.4-0.5e10 bpmAllMoverCalibration_20130423_232901.dat.gz streakLog_20130423_233420.dat 100 charge not very stable
0.15-0.3e10 bpmAllMoverCalibration_20130423_234519.dat.gz streakLog_20130423_235030.dat 100 charge not very stable
0.07-0.15e10 bpmAllMoverCalibration_20130423_235347.dat.gz streakLog_20130423_235903.dat 100 charge not very stable
0.4-0.5e10 bpmAllMoverCalibration_20130424_000226.dat.gz streakLog_20130424_000747.dat 200 charge not very stable

00:20 Calibration of BPMs

wrong calibrations (some examples, to be checked)

QM16FFy bpmAllMoverCalibration_20130424_012959.dat.gz bad mover reading?
QM15FFy bpmAllMoverCalibration_20130424_014753.dat.gz bad mover reading
QM14FFx bpmAllMoverCalibration_20130424_015536.dat.gz bad mover reading
SF6FFy bpmAllMoverCalibration_20130424_035656.dat.gz mover releases trim before settling. sleep put into code. more permanent solution needed
SF1FF & SD0FF bpmAllMoverCalibration_20130424_063927.dat.gz no clear orbit subtraction due to sband system shifted one pulse wrt cband

orbit response

corrector file orbit
ZV1X bpmFs_20130424_073222_ZV1X.dat bpmAllLog_20130424_073756.dat

resolution data (500 pulses): bpmAllLog_20130424_075021.dat.gz

calibrate BPM with quadrupole on and off QM14FF (original current -70.036A) switch off QM14FF, which has large current (70A), and recalibrate. Orbit seems not too much affected.

BPM magnet on file rotation angle pos scale comment
QM14FFy on bpmAllMoverCalibration_20130424_075326.dat.gz -2.02 93.1  
QM14FFx on bpmAllMoverCalibration_20130424_075759.dat.gz -1.3975 67.34  
QM14FFy off bpmAllMoverCalibration_20130424_080311.dat.gz -2.03 76.89  
QM14FFx off bpmAllMoverCalibration_20130424_080800.dat.gz -1.3683 81.86  
QM14FFy on bpmAllMoverCalibration_20130424_081438.dat.gz -2.0011 93.34  
QM14FFx on bpmAllMoverCalibration_20130424_082354.dat.gz -1.3738 68.49  

long ref. cavity scan (9 steps, 300 pulses, +- 4mm)

bpmAllMoverCalibration_20130424_082948.dat.gz

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Topic revision: r5 - 24 Apr 2013 - JsnuverinkSnuverink

 
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