Difference between revisions of "Tuesday, Mar. 08: DAY Shift"

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  - 8:30 AM:
 
  - 8:30 AM:
 
     Elastic Angle Calibration:
 
     Elastic Angle Calibration:
−
     DVCS Trigger s0 only in HRS trigger, Elastics with Calo in current Kin_048_3 setting [[https://hallaweb.jlab.org/wiki/index.php/Run_Plan_%28DVCS3%29 here]], 15 microAmp
+
     DVCS Trigger s0+s2m only in HRS trigger, Elastics with Calo in current Kin_048_3 setting [[https://hallaweb.jlab.org/wiki/index.php/Run_Plan_%28DVCS3%29 here]], 15 microAmp
  
 
  - 9:30 AM  <B>Escorted Access</B>: Move Calo to 6 m, 14.0 deg     
 
  - 9:30 AM  <B>Escorted Access</B>: Move Calo to 6 m, 14.0 deg     
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*** <b>Back to Production run, Kin48_2 </b>
 
*** <b>Back to Production run, Kin48_2 </b>
 
** After Alex's work, Compton laser will be turned OFF !
 
** After Alex's work, Compton laser will be turned OFF !
−
* Polarized beam at 15 uA on LH2 15 cm! (out of chicane ? )
+
* Polarized beam at 9 uA on LH2 15 cm!
 
* DVCS is running kin_48_2 [[https://hallaweb.jlab.org/wiki/index.php/Run_Plan_%28DVCS3%29 here]]
 
* DVCS is running kin_48_2 [[https://hallaweb.jlab.org/wiki/index.php/Run_Plan_%28DVCS3%29 here]]
 
* LHRS is partially detuned: [[https://logbooks.jlab.org/entry/3384965 here]]
 
* LHRS is partially detuned: [[https://logbooks.jlab.org/entry/3384965 here]]
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<b>Please check more info on the white board in the Counting House ~!! </b>
 
<b>Please check more info on the white board in the Counting House ~!! </b>
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<b>MCC Beam Team Meeting on Tuesday 1:30PM</b>
 +
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** Julie note from Beam Team Meeting at 1:30PM, Mar.8, 2016 at MCC.
 +
 +
* <b>Purpose</b>: Plans to run at 60uA
 +
 +
* <b>Current issues</b>:
 +
- There is no consensus on why the beam is limited at 30 uA.
 +
 +
* <b>Ideas</b>:
 +
- 1/ The limitation is in the injector
 +
- 2/ In the RF separator
 +
 +
* <b>Attempt</b>:
 +
- 1/ Removing/Changing Wien filter (horizontal-> vertical) ??
 +
- 2/ Run with a magnetic separation ??
 +
 +
* <b>Problem foresee</b>:
 +
 +
- 1/  ??
 +
- 2/ Compatible with Hall D taking data
 +
 +
* <b>GMp expert inform</b>:
 +
- 1/ Polarization is not matter
 +
- 2/ High current 60 uA should be deliverable for calibration and production both 4pass and 5pass
 +
 +
* <b>Concluded Plan</b>:
 +
- Try 60 uA Thursday morning up to noon

Latest revision as of 11:45, 9 March 2016

Go back to Daily Run Plan Daily Run Plans


Previously...

  • Production data (Kin48_3)



Specific mission

      • Elastic measurement during DAY
- 6:30 AM:
     Beam Off, Call MCC to put Hall A in Controlled Access
     Starting Ramping HRS-L magnets to 0

- 7:30 AM:Controlled Access:
    Tech in Hall, Change HRS-L Polarity, Move Angle to 40.0 deg, Set Momentum = 2.5106 GeV/c, Q1 = 1900 Amp

- 8:30 AM:
   Elastic Angle Calibration:
   DVCS Trigger s0+s2m only in HRS trigger, Elastics with Calo in current Kin_048_3 setting [here], 15 microAmp

- 9:30 AM  Escorted Access: Move Calo to 6 m, 14.0 deg    
   
- 10:00 AM Elastic Energy Calibration data  20 microAmp

- 10:30 AM Escorted Access: Move Calo to 13.1 deg

- 11:00 AM Elastic Energy Calibration data

- 11:30 AM Escorted Access:   Move Calo to 12.25 deg

- 12:00 PM Elastic Energy Calibration data

- 12:30 PM Escorted Access: Move Calo to Kin_48_2 setting:    15.184 deg, D=2.0 m,   10 micro Amp

- 01:00 PM Angle Calibration Data
   (This puts the central elastic 7.1 GeV electrons 2.0 blocks from the physical edge of the calorimeter.)

- 02:00 PM Controlled Access?
        Ramp down HRS-L
        Polarity, Angle change HRS-L to 20.244 deg to p = 3.996 GeV/c, Q1 = 1900 Amp

- 03:00 PM Production DVCS at KIN_48_2[here]


      • Back to Production run, Kin48_2
    • After Alex's work, Compton laser will be turned OFF !
  • Polarized beam at 9 uA on LH2 15 cm!
  • DVCS is running kin_48_2 [here]
  • LHRS is partially detuned: [here]
- LHRS=3.996GeV, Q1/Q2/Q3=1916.640(readout:1900)/1600/1600 (Q1 regul.OFF)

- PreScaleR : PS1=PS2=PS3=1, && PS8=200

- PreScaleL : PS9 =1, + DVCS config.
  • beam locks: no position lock, energy lock in Arc 2: [here]
  • DVCS daq configuration is [this one], we are measuring about 2% DT at 15uA.







BPM/Spot++ Check

  • After beam lost for considerable time (like beam study, pass change,...)
  • Ask MCC to run 5uA wth carbon hole target and make sure you can see the hole through Spot++




Please check more info on the white board in the Counting House ~!!










MCC Beam Team Meeting on Tuesday 1:30PM

    • Julie note from Beam Team Meeting at 1:30PM, Mar.8, 2016 at MCC.
  • Purpose: Plans to run at 60uA
  • Current issues: 
- There is no consensus on why the beam is limited at 30 uA.
  • Ideas:
- 1/ The limitation is in the injector 
- 2/ In the RF separator
  • Attempt:
- 1/ Removing/Changing Wien filter (horizontal-> vertical) ??
- 2/ Run with a magnetic separation ??
  • Problem foresee:
- 1/  ?? 
- 2/ Compatible with Hall D taking data
  • GMp expert inform:
- 1/ Polarization is not matter
- 2/ High current 60 uA should be deliverable for calibration and production both 4pass and 5pass
  • Concluded Plan:
- Try 60 uA Thursday morning up to noon
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