Difference between revisions of "Detailed High current plan"
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#*5uA (review) (10-20min) | #*5uA (review) (10-20min) | ||
#*20uA (review) (10min) | #*20uA (review) (10min) | ||
| + | #*access to remove shutter | ||
| + | #*(FFB ON at 40-50uA check gains SAT). | ||
| + | #*40-50 uA (1hr) (hel mags?) | ||
| + | #(*calibration scan FFB ON: detectors, cavs, sams, check not 12X SAT) | ||
| + | #(*calibration scan 2 Gains OFF: Compton BPMs ) | ||
| + | #(*PITA scan - check det linearities) | ||
| + | #Compton | ||
| + | #BMW | ||
| + | #*tune + low current | ||
| + | #*ready for high current | ||
| + | #*(sams? 2-3uA? target?) | ||
Revision as of 16:49, 27 June 2019
Beamline instrumentation calibration
- Sieve in VDC on
- 1uA 0.2% Carbon
- Access to convert DET
- All HV off except quartz
- High current - no target
- (FFB ON OPS commission - Eric Foreman)
- Ramp to HI-CURRENT ON (commission target, raster?)
- Lead
- RASTER!
- (Aq feedback on. SAMs, DETs HVs on. Online Analyzer going. Slow locks on HallATGTlock (4eX,Y=0.6,0.4 or -0.25,-0.25), HallAComLock?)
- 5uA (review) (10-20min)
- 20uA (review) (10min)
- access to remove shutter
- (FFB ON at 40-50uA check gains SAT).
- 40-50 uA (1hr) (hel mags?)
- (*calibration scan FFB ON: detectors, cavs, sams, check not 12X SAT)
- (*calibration scan 2 Gains OFF: Compton BPMs )
- (*PITA scan - check det linearities)
- Compton
- BMW
- tune + low current
- ready for high current
- (sams? 2-3uA? target?)
- Check the following has been performed
- 50uA-70uA beam current, through Compton (backgrounds on fingers and Compton photon detector) with no target
- Establish 4x4 raster. Insert lead target. (low current, ramp up. check collimator water, vary raster size 4x6?)
- Set Detector and SAM voltages (Dustin M)
- Check Conditions OK
- collimator water
- thermocouple temperatures
- radiation monitors
- ion chamber stability
- Setup Locks (these are necessary for main detectors and SAM calibration)
- Slow Target Lock on 4A, 4E (jmenu->"slow locks"-> Orbit Locks Expanded View -> HallATGT)
- Fast feedback for HallA on (iocse9)
- If beam is going through Compton, HallAComLock should probably be on
- Should HallAMolLock be on?
- Coordinate
- Should Compton and Moller DAQ be running during calibration?
- Dustin and Devi examining SAMs and Detectors with online analyzer during calibration
- Juan Carlos/Amali/Adam monitor Compton background rates and run the DAQ?
- Ye puts Cavity BPMs in high current mode (opsl01 -> menubar->EDM->BPM->BPM Diagnostics DR(12GeV)->HallA BCMs B,C,D -> button -> Expert Controls -> HWReg button -> DACSL1 = 0x1 / 0x1 and DACSL2 = 0x1 / 0x1 -> back out to previous screen XVGA2 = 0 and YVGA2 =0 (for low current do 0x0 and VGA2=30). Do for all 3 BPM Cavs.
- Calibration Procedure A: with UNSER
- start at 70uA for 1min (scandata1==value in BCM0l02)
- beam off
- wait for 5sec(for unser to equilibrate), take unser pedestal data point for 30sec (scandata1=0)
- beam on at 75uA
- check slow target lock is in position
- check FFB on for HallA
- check no bpms are saturated on iocse9
- wait for 5sec(for unser to equilibrate), take next data point for 1min
- repeat for 65uA,60uA,55uA,50uA,40uA,30uA,20uA,10uA
- Calibration Procedure B: with pre-calibrated Hall BCM (analog upstream bcm)
- start at 70uA for 1min (scandata1==value in BCM0l02)
- change current to 75uA
- check slow target lock is in position
- check FFB on for HallA
- check no bpms are saturated on iocse9
- take next 1min data point
- repeat for 65uA,60uA,55uA,50uA,40uA,30uA,20uA,10uA
- Calibration Procedure C: for BPMs (Compton bpms not yet calibrated)
- at 70uA, set gains off for iocse9,iocse10 (Hall) iocse11,iocse12,iocse19,iocinse4 (Inj)
- perform Calibration Procedure B with pre-calibrated Hall BCM
