Difference between revisions of "Detailed High current plan"

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[[CREX_Detailed_High_current_plan|CREX version]]
 
== Beamline instrumentation calibration ==
 
== Beamline instrumentation calibration ==
−
* (x,y) = (0,0)4a and (0.6,0.4)4e
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#<font color=blue> Check detector alignment and pulse height</font> (Done)
−
# XXXAccess to insert sieve
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#* 1uA cavity lock
−
# Check detector alignment and pulse height
 
−
#* XXXSieve in.
 
 
#* 0.2% Carbon
 
#* 0.2% Carbon
 
#* 20 nA, cavity locks on and cavities in low current mode
 
#* 20 nA, cavity locks on and cavities in low current mode
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#* Check rates, verify pulse height spectra and alignment
 
#* Check rates, verify pulse height spectra and alignment
 
#* Modify DAQ to include GEMS. 10 minute run with GEMS.
 
#* Modify DAQ to include GEMS. 10 minute run with GEMS.
−
# C-Hole target, verify spot  
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#<font color=blue> C-Hole target, verify spot </font> (Done)
−
#* 2 uA, spot ++ verify raster size
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#* 20 nA, spot ++ verify raster size
 
#* harp scan 4e, verify intrinsic size at target
 
#* harp scan 4e, verify intrinsic size at target
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# High current - no target  
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#<font color=blue>  High current - no target </font> (Skip it tonight)
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#* FFB ON - (If before 11, try to get Eric Foreman)
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#* verify compton rates
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#* verify compton rates, Compton lock?
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#<font color=blue>  Ramp to SAM Shutter test </font>
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#Ramp to HI-CURRENT septum test  
 
 
## Insert Lead Target.  
 
## Insert Lead Target.  
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### 1 uA. Raster 10x10.  
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##*Raster 10x10.  
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###* spot++ verify not seeing edges
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##*  20 nA.  (Atten 107, slit 15)
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## Set raster ?x?  (to get (x.y) = 4x6 real)
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##* Cav locks on
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## verify beam position (x,y) = (0,0)4a and (0.6,0.4)4e
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##* spot++ verify not seeing edges
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## All HV off in HRS hut
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##* Set raster ?x?  (to get (x.y) = 4x6 real)
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##(remove SAM shutters?)
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## go up in current 1uA  (5min)
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## 5uA (review) (10-20min)
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##* All HV off in HRS hut
 +
##* Target lock (0.6mm, 0.4mm)
 +
##* Collimator water temp
 +
##* beamline temperatures
 +
##* Ion chamber (stability)
 +
##* SAM yields
 +
##* BCM and BPM yields, widths.
 +
#<font color=blue>  access to remove SAM shutters, detector to integrate mode.</font>
 +
#<font color=blue> Ramp to hi current test. </font>
 +
##* cavity bpm back to high current mode
 +
##* All HV off in HRS hut, except quartz
 +
##* Target lock (0.6mm, 0.4mm)
 +
## 5uA (review) (10min)
 
##* Target lock, FFB (monitor bpm SAT)
 
##* Target lock, FFB (monitor bpm SAT)
 
##* Collimator water temp
 
##* Collimator water temp
 
##* beamline temperatures
 
##* beamline temperatures
 
##* Ion chamber (stability)
 
##* Ion chamber (stability)
−
##* SAM yields and widths
+
##* SAM and DET yields and widths
 
##* BCM and BPM yields, widths.
 
##* BCM and BPM yields, widths.
−
## access (remove SAM shutters?)
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## 20uA (review) (10min)
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##20uA (review) (10min)
 
 
##* Target lock, FFB (monitor bpm SAT)
 
##* Target lock, FFB (monitor bpm SAT)
 
##* Collimator water temp
 
##* Collimator water temp
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##* SAM and DET yields and widths
 
##* SAM and DET yields and widths
 
##* BCM and BPM yields, widths.
 
##* BCM and BPM yields, widths.
−
##Access to convert detectors (remove SAM shutters?)
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## 40-50A(1hr)
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##40-50A(1hr)
 
 
##* Target lock, FFB (monitor bpm SAT)
 
##* Target lock, FFB (monitor bpm SAT)
 
##* Aq feedback
 
##* Aq feedback
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##* SAM and DET yields and widths
 
##* SAM and DET yields and widths
 
##* BCM and BPM yields, widths.
 
##* BCM and BPM yields, widths.
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#Calibration scan FFB ON  
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#<font color=blue>Calibration scan </font>
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##*FFB ON  
 
##* to 40-50uA  
 
##* to 40-50uA  
 
##* SAMs HVs set
 
##* SAMs HVs set
 
##* DETs HVs set
 
##* DETs HVs set
 
##* PITA scan at end to check det linearities later
 
##* PITA scan at end to check det linearities later
−
#BMW  
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#<font color=blue>BMW </font>
 
##*tune beam, slow lock on (ad FFB on?), exercise BMW, check no ion chamber trips, check pauses locks and FFB
 
##*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
 
##*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
 
##*target in, low current 2-3uA,exercise BMW, check BPM signals, check no ion chamber issues
 
##*"ready for high current"
 
##*"ready for high current"
−
 
−
 
−
### Target lock, FFB
 
−
### Collimator water temp
 
−
### beamline temperatures
 
−
### Ion chamber (stability)
 
−
### SAM yields and widths
 
−
### BCM and BPM yields, widths.
 
−
 
−
# Re-establish high current - no target
 
−
#
 
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#Ramp to HI-CURRENT ON (commission target, raster?)
 
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#*Lead
 
−
#RASTER!
 
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#*(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?)
 
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#*5uA (review) (10-20min)
 
−
#*20uA (review) (10min)
 
−
#*access to remove shutter
 
−
#*(FFB ON at 40-50uA check gains SAT).
 
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#*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
 
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#*tune + low current
 
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#*ready for high current
 
−
#*(sams? 2-3uA? target?)
 
−
 
−
 
  
  

Latest revision as of 13:18, 8 December 2019

CREX version

Beamline instrumentation calibration

  1. Check detector alignment and pulse height (Done)
    • 1uA cavity lock
    • 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.
  2. C-Hole target, verify spot (Done)
    • 20 nA, spot ++ verify raster size
    • harp scan 4e, verify intrinsic size at target
  3. High current - no target (Skip it tonight)
    • verify compton rates
  4. Ramp to SAM Shutter test
    1. Insert Lead Target.
      • Raster 10x10.
      • 20 nA. (Atten 107, slit 15)
      • Cav locks on
      • spot++ verify not seeing edges
      • Set raster ?x? (to get (x.y) = 4x6 real)
    2. go up in current 1uA (5min)
      • All HV off in HRS hut
      • Target lock (0.6mm, 0.4mm)
      • Collimator water temp
      • beamline temperatures
      • Ion chamber (stability)
      • SAM yields
      • BCM and BPM yields, widths.
  5. access to remove SAM shutters, detector to integrate mode.
  6. Ramp to hi current test.
      • cavity bpm back to high current mode
      • All HV off in HRS hut, except quartz
      • Target lock (0.6mm, 0.4mm)
    2. 5uA (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.
    3. 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.
    4. 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.
  7. Calibration scan
      • FFB ON
      • to 40-50uA
      • SAMs HVs set
      • DETs HVs set
      • PITA scan at end to check det linearities later
  8. BMW
      • 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. 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
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