222012 Goal monitor clock jitter during ramping BEAM1 clock more than 10 ramps done different CORDE delay ranging from 44ns to 10ns PbPb 2011 delays were 44ns 67ns also blowup applied a slow change of frequency roughly in the middle of the ramp ID: 546713
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Slide1
Clock jitter tests
2.2.2012Goal: monitor clock jitter during ramping BEAM1 clock more than 10 ramps done different CORDE delay ranging from 4.4ns to 10ns. PbPb 2011 delays were 4.4ns - 6.7ns. also blow-up applied (a slow change of frequency roughly in the middle of the ramp)
13.2.2012Goal: repeat test with magnetic field, blow-ups not applied now several ramps without magnetic field or during ramping magnets CORDE delay: 6670ps solenoid on (-) from 12:50, dipole on (-) from 13:28 last 2 ramps with both magnets on (negative) CORDE: 4390ps from 12:35 CORDE: 8000ps from 13:53
Clock jitter, monitored with scope in persistence mode all the time, was not observed.Slide2
Clock jitter tests