Difference between revisions of "Detailed High current plan"

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== Beamline instrumentation calibration ==
 
== Beamline instrumentation calibration ==
 +
* (x,y) = (0,0)4a and (0.6,0.4)4e
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# Access to insert sieve
 +
# Check detector alignment and pulse height
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#* Sieve in.
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#* 0.2% Carbon
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#* 1 uA
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#* VDC on.
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#* Check rates, verify pulse height spectra and alignment
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#* Modify DAQ to include GEMS. 10 minute run with GEMS.
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# C-Hole target, verify spot
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#* 2 uA, spot ++ verify raster size
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#* harp scan 4e, verify intrinsic size at target
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# High current - no target
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#* FFB ON - (If before 11, try to get Eric Foreman)
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#* verify compton rates, Compton lock?
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#Ramp to HI-CURRENT septum test
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## Insert Lead Target.
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### 1 uA. Raster 10x10.
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###* spot++ verify not seeing edges
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## Set raster ?x?  (to get (x.y) = 4x6 real)
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## verify beam position (x,y) = (0,0)4a and (0.6,0.4)4e
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## 5uA (review) (10-20min)
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### Collimator water temp
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### Ion chambers
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##20uA (review) (10min)
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##*
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−
#Sieve in VDC on
 
−
#* 1uA 0.2% Carbon
 
 
#Access to convert DET
 
#Access to convert DET
 
#*All HV off except quartz
 
#*All HV off except quartz

Revision as of 17:20, 27 June 2019

Beamline instrumentation calibration

  • (x,y) = (0,0)4a and (0.6,0.4)4e
  1. Access to insert sieve
  2. Check detector alignment and pulse height
    • Sieve in.
    • 0.2% Carbon
    • 1 uA
    • VDC on.
    • Check rates, verify pulse height spectra and alignment
    • Modify DAQ to include GEMS. 10 minute run with GEMS.
  3. C-Hole target, verify spot
    • 2 uA, spot ++ verify raster size
    • harp scan 4e, verify intrinsic size at target
  4. High current - no target
    • FFB ON - (If before 11, try to get Eric Foreman)
    • verify compton rates, Compton lock?
  5. Ramp to HI-CURRENT septum test
    1. Insert Lead Target.
      1. 1 uA. Raster 10x10.
        • spot++ verify not seeing edges
    2. Set raster ?x? (to get (x.y) = 4x6 real)
    3. verify beam position (x,y) = (0,0)4a and (0.6,0.4)4e
    4. 5uA (review) (10-20min)
      1. Collimator water temp
      2. Ion chambers
    1. 20uA (review) (10min)


  1. Access to convert DET
    • All HV off except quartz
  2. High current - no target
    • (FFB ON OPS commission - Eric Foreman)
  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
    • Should HallAMolLock 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
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