Difference between revisions of "RC Meeting and Run Plan, Wed, January 15th 2020"

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= Current Run Plan =
 
= Current Run Plan =
  
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*Tuesday: 1-pass data with longitudinal asymmetries (https://hallcweb.jlab.org/wiki/index.php/1-pass_calibration_for_A1n_(Jan_2020) ).
+
*Wednesday evening: Finish taking asymmetries data. Open the target enclosure, remove collimators, do a local EPR and close the panels. Transition to 5-pass. The run plan is here: (https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n ).  
−
*Wednesday: Finish taking asymmetries data. Open the target enclosure, remove collimators, do a local EPR and close the panels. Transition to 5-pass. The run plan is here: (https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n ).  
+
**Beam checkout [https://hallcweb.jlab.org/wiki/index.php/Beam_and_Raster_Checkout_for_A1n/d2n_(Short_Procedure) Short procedure]
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**Beam checkout
+
*** Want beam sigma between 100-300um.
−
**Rate study with Ref 3He Cell: 2 hours at high momentum setting, 2 hours at the low momentum setting.
+
**Glass cell Commissioning (1 hr each on two glass cells):[https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Glass_Cell_Current_Scan.2FCheckout_and_Commissioning Run plan]
−
**Can do beam energy measurement, meanwhile we cycle the magnet to high momentum setting
+
**If target polarization is close to maximum, we go straight to
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**Either: Vent the 3He from Ref Cell, take Empty, H2 and N2 (1-2 hours each) OR Polarized 3He longitudinal production, until Moller measurement Thursday Day.
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***A3) production: [https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Large_Angle_.2830-degree.29_Polarized_3He_Asymmetries_High_Momentum_Setting_.28Kine_4.2CB.29 Run Plan]
 +
**If not, do some "filler" runs. At any point within B3,B4 and B5, if target polarization is high enough, go back to A3) above.
 +
***B3) Rate study with Ref 3He Cell: 2 hours at high momentum setting, 2 hours at the low momentum setting.[https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Large_Angle_.2830-degree.29_Rate_study_with_3He_Reference_Cell_or_Polarized_3He_Cell Run Plan]
 +
***B4) Cycle the magnet to high momentum setting. If this happens during day/swing, ask MCC to perform an energy measurement;
 +
***B5) Vent the 3He from Ref Cell, take Empty, H2 and N2 (1-2 hours each), [https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Large_Angle_.2830-degree.29_Reference_Cell_H2_and_N2_Runs_.2820_hours_total.29 Run Plan]
 
*Thursday: TO class + Moller measurement.
 
*Thursday: TO class + Moller measurement.
  

Revision as of 16:58, 15 January 2020

RC Meeting Information

RC Daily Meetings are at 4:15 PM, 2nd floor Counting House Meeting Room

  • Bluejeans remote connection information:
 To join the Meeting:
 https://bluejeans.com/861439920
 To join via Room System:
 Video Conferencing System: bjn.vc -or-199.48.152.152
 Meeting ID : 861439920
 To join via phone :
 1)  Dial:
   +1.408.740.7256 (US (San Jose))
   +1.888.240.2560 (US Toll Free))
   +1.408.317.9253 (US (Primary, San Jose))
   (see all numbers - http://bluejeans.com/numbers)
 2)  Enter Conference ID : 861439920

Useful Links

General updates

  • Finished 1 pass at around 3:20am.
  • Target changeover to 5pass.
  • TO class on Thursday in the Hall C counting room from 2:30 pm - 4:00 pm.

Current Run Plan

  • Wednesday evening: Finish taking asymmetries data. Open the target enclosure, remove collimators, do a local EPR and close the panels. Transition to 5-pass. The run plan is here: (https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n ).
    • Beam checkout Short procedure
      • Want beam sigma between 100-300um.
    • Glass cell Commissioning (1 hr each on two glass cells):Run plan
    • If target polarization is close to maximum, we go straight to
    • If not, do some "filler" runs. At any point within B3,B4 and B5, if target polarization is high enough, go back to A3) above.
      • B3) Rate study with Ref 3He Cell: 2 hours at high momentum setting, 2 hours at the low momentum setting.Run Plan
      • B4) Cycle the magnet to high momentum setting. If this happens during day/swing, ask MCC to perform an energy measurement;
      • B5) Vent the 3He from Ref Cell, take Empty, H2 and N2 (1-2 hours each), Run Plan
  • Thursday: TO class + Moller measurement.

Notices in Effect for Shift Crew

  • Policy for CANS-related hall status change: Make a logbook entry when the hall goes in, or comes out of laser-controlled access.
  • Magnet policies
    • HMS Q1 must be ramped down in 50A steps in all cases
    • Do not ramp HMS Q2 to zero, only go to 10A and then switch off power.
  • Inform the RC of any access that the Target Team requires. The RC will coordinate with RadCon to make everything run smoothly.
  • The operators have been somewhat careful with our beam orbit locks. Please make sure that the orbit locks are enabled and the beam does not drift from its nominal position.
  • Ramp rate lock instructions are here and added to checklist[1]
  • Temporary Laser instructions can be found here [2]

Ongoing Work in the Hall

Planned Accelerator Configuration Changes

Special Requests

  • Keep target expert schedule filled out on whiteboard
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