Detailed High current plan

Beamline instrumentation calibration

• (x,y) = (0,0)4a and (0.6,0.4)4e

1. 1uA cavity lock to X=0.6, Y=0.4
2. XXXAccess to insert sieve
3. Check detector alignment and pulse height
   • XXXSieve in.
   • 0.2% Carbon
   • 20 nA, cavity locks on and cavities in low current mode
   • VDC on.
   • Check rates, verify pulse height spectra and alignment
   • Modify DAQ to include GEMS. 10 minute run with GEMS.
4. C-Hole target, verify spot
   • 2 uA, spot ++ verify raster size
   • harp scan 4e, verify intrinsic size at target
5. High current - no target
   • FFB ON - (If before 11, try to get Eric Foreman)
   • verify compton rates, Compton lock?
6. Ramp to HI-CURRENT SAM test
   1. Insert Lead Target.
   2. 20 nA.
      • Raster 10x10.
      • Cav locks on
      • spot++ verify not seeing edges
      • Set raster ?x? (to get (x.y) = 4x6 real)

1. 1. • All HV off in HRS hut
   2. (remove SAM shutters?)
   3. 5uA (review) (10-20min)
      • Target lock (0.6mm, 0.4mm), FFB (monitor bpm SAT)
      • cavity bpm back to high current mode
      • Collimator water temp
      • beamline temperatures
      • Ion chamber (stability)
      • SAM yields and widths
      • BCM and BPM yields, widths.
   4. access (remove SAM shutters?)
   5. 20uA (review) (10min)
      • Target lock, FFB (monitor bpm SAT)
      • Collimator water temp
      • beamline temperatures
      • Ion chamber (stability)
      • SAM and DET yields and widths
      • BCM and BPM yields, widths.
   6. Access to convert detectors (remove SAM shutters?)
   7. 40-50A(1hr)
      • Target lock, FFB (monitor bpm SAT)
      • Aq feedback
      • Collimator water temp
      • beamline temperatures
      • Ion chamber (stability)
      • SAM and DET yields and widths
      • BCM and BPM yields, widths.
2. Calibration scan FFB ON
   1. • to 40-50uA
      • SAMs HVs set
      • DETs HVs set
      • PITA scan at end to check det linearities later
3. BMW
   1. • tune beam, slow lock on (ad FFB on?), exercise BMW, check no ion chamber trips, check pauses locks and FFB
      • low current 2-3uA, exercise BMW, check BPM signals, check no ion chamber issues
      • target in, low current 2-3uA,exercise BMW, check BPM signals, check no ion chamber issues
      • "ready for high current"

1. 1. • verify beam position (x,y) = (0,0)4a and (0.6,0.4)4e

1. • (rate study?)
   1. 1. Target lock, FFB
      2. Collimator water temp
      3. beamline temperatures
      4. Ion chamber (stability)
      5. SAM yields and widths
      6. BCM and BPM yields, widths.

1. Re-establish high current - no target
3. Ramp to HI-CURRENT ON (commission target, raster?)
   • Lead
4. 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?)
5. (*calibration scan FFB ON: detectors, cavs, sams, check not 12X SAT)
6. (*calibration scan 2 Gains OFF: Compton BPMs )
7. (*PITA scan - check det linearities)
8. Compton
9. BMW
   • tune + low current
   • ready for high current
   • (sams? 2-3uA? target?)

1. 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)
2. Check Conditions OK
   • collimator water
   • thermocouple temperatures
   • radiation monitors
   • ion chamber stability
3. 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
4. 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.
5. 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
6. 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
7. 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