Difference between revisions of "Start-up plan"

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** Check online replay plots. Experts will be at the CH to check.
 
** Check online replay plots. Experts will be at the CH to check.
 
** scaler rates: post snapshots to halog
 
** scaler rates: post snapshots to halog
* Optics calibrations (Experts: Bogdan, John, Vardan, ...)
+
* Optics calibrations (Experts: Bogdan, John, Vardan, ...):
 
** You may need to cycle the quads  
 
** You may need to cycle the quads  
 
** Set the spectrometer magnets: [https://hallaweb.jlab.org/wiki/index.php/How_to_set_HRS_magnets]
 
** Set the spectrometer magnets: [https://hallaweb.jlab.org/wiki/index.php/How_to_set_HRS_magnets]
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   Q2: 1.1 GeV - 449.218 Amps
 
   Q2: 1.1 GeV - 449.218 Amps
 
   Q3: 1.1 GeV - 528.000 Amps
 
   Q3: 1.1 GeV - 528.000 Amps
 
 
** Start with RHRS. Set LHRS (positive polarity) RHRS (negative polarity)
 
** Start with RHRS. Set LHRS (positive polarity) RHRS (negative polarity)
 
** Once the right arm is finished, move on to the LRHS. Set LRHS (neg) RHRS (pos). Leave the polarity as it is for the production.
 
** Once the right arm is finished, move on to the LRHS. Set LRHS (neg) RHRS (pos). Leave the polarity as it is for the production.
 
   
 
   
 +
 
* BPM calibration. Instruction: [[BPM]]
 
* BPM calibration. Instruction: [[BPM]]

Revision as of 13:33, 8 February 2019

Start-up run plan

Item 1-4 to be done by the MCC. RC will be at the MCC and help communicating with the shift crew.

  • Beam and target alignment
 1. Beam to the dump. Septum off, no target.
 2. ion chamber calibrations. Yves has a special target to insert.
 3. Beam and target alignment (1x1 raster, carbon hole target, wire target, S3 scintillator. setting ready for Yves).
 4. Set corrector magnets with septum on. Beam to dump. Will be done quickly. 

Once Yves is done and MCC is ready to deliver CW beam to Hall A:

  • Detector checkout:
    • do in parallel with optics runs.
    • Check online replay plots. Experts will be at the CH to check.
    • scaler rates: post snapshots to halog
  • Optics calibrations (Experts: Bogdan, John, Vardan, ...):
    • You may need to cycle the quads
    • Set the spectrometer magnets: [1]
    • initial tune: p0: 1.1 GeV, polarity: LHRS (pos), RHRS (neg)
 Left Arm:
 Q1: 1.1 GeV - 152.823 Amps
 Q2: 1.1 GeV - 449.460 Amps
 Q3: 1.1 GeV - 528.275 Amps    
 Right Arm:
 Q1: 1.1 GeV - 146.762 Amps
 Q2: 1.1 GeV - 449.218 Amps
 Q3: 1.1 GeV - 528.000 Amps
    • Start with RHRS. Set LHRS (positive polarity) RHRS (negative polarity)
    • Once the right arm is finished, move on to the LRHS. Set LRHS (neg) RHRS (pos). Leave the polarity as it is for the production.


  • BPM calibration. Instruction: BPM