Difference between revisions of "RC Meeting and Run Plan, Tues, January 21st 2020"

From HallCWiki
Jump to: navigation, search
(Created page with "= RC Meeting Information = <b> RC Daily Meetings are at 4:15 PM, 2nd floor Counting House Meeting Room </b> * Bluejeans remote connection information: To join the Meeting:...")
 
(Current Run Plan)
Line 29: Line 29:
  
 
= Current Run Plan =
 
= Current Run Plan =
* Take NMR every 2 hours
+
* Take NMR every 5-6 hours
 
* Always take 120Hz of EDTM
 
* Always take 120Hz of EDTM
 
+
* After beam comes back we have two options:
== Friday Swing/Owl ==
+
1.If the target polarization is good
*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]
+
*we will continue with the present kinematics with the polarized target. [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.2C_511_PAC_hours_total.29 Run plan for high momentum 30 deg polarized helium]
 
+
2.If the target polarization needs time to increase
 
+
* We will do the cross section study with 3He reference cell
== Saturday Day ==
+
**See [https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Large_Angle_.2830-degree.29_Reference_Cell_H2_and_N2_Runs_.289_PAC_hours_total_not_including_magnet_change.29 Run Plan]
*Moller measurement will start around 8am.
+
**This is about 5 hours of 30uA beam
**Start with Moller setup and measurement at present Wien angle (last about 4 hours).
+
** Will need to cycle magnets to go back to  HMS/SHMS at -3.5/-3.4 GeV/c.
 +
*If the target polarization still needs time to increase
 +
**we will do part of the reference cell empty,N2 and H2 running for HMS/SHMS at -3.5/-3.4 GeV/c.
 +
**See [https://hallcweb.jlab.org/wiki/index.php/5-pass_production_for_A1n#Large_Angle_.2830-degree.29_Reference_Cell_H2_and_N2_Runs_.289_PAC_hours_total_not_including_magnet_change.29 RUn plan]
 +
**This is about 6 hours of 30uA beam
 +
* Otherwise more data with the polarized target. [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.2C_511_PAC_hours_total.29 Run plan for high momentum 30 deg polarized helium]
  
 
= Special Requests =
 
= Special Requests =

Revision as of 14:40, 21 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

  • Over Thursday Swing and Owl, beam off or low current.
  • Friday morning MCC did RF recovery for 1 hour and worked on reduce BLM trips at 9S.

Current Run Plan

  • Take NMR every 5-6 hours
  • Always take 120Hz of EDTM
  • After beam comes back we have two options:

1.If the target polarization is good

2.If the target polarization needs time to increase

  • We will do the cross section study with 3He reference cell
    • See Run Plan
    • This is about 5 hours of 30uA beam
    • Will need to cycle magnets to go back to HMS/SHMS at -3.5/-3.4 GeV/c.
  • If the target polarization still needs time to increase
    • we will do part of the reference cell empty,N2 and H2 running for HMS/SHMS at -3.5/-3.4 GeV/c.
    • See RUn plan
    • This is about 6 hours of 30uA beam
  • Otherwise more data with the polarized target. Run plan for high momentum 30 deg polarized helium

Special Requests

  • Keep target expert schedule filled out on whiteboard
  • Andy Kenyon has parts ready for the nitrogen for the cooling jets.= Ongoing Work in the Hall


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]


Planned Accelerator Configuration Changes