Run plan/To do list - Tuesday, December 19 2017 - owl shift

From HallCWiki
Jump to: navigation, search

Notices

  1. SHMS DIPOLE MAX CURRENT IS 2100 A
  2. Do not rotate either SHMS or HMS if the HMS dipole current is above 2500 A
  3. The SHMS angle is currently 7.5 degrees. ONLY ROTATE TO LARGER ANGLES.
    1. Once we have rotated to larger angle, the minimum angle will be 10 degrees.
    2. Smaller SHMS angles will require an access and assistance from Steve Lassiter/Mike Fowler
  4. Nominal beam positions (for now): x=-1.0, y=-0.75 at IPM3H07C
  5. Be sure to fill out the beam time accounting - edit the form as necessary. The values "auto-filled" from EPICS are not always accurate.

Runplan

  • Overview
 Continue swing shift program as needed:
 Check SHMS tune with carbon elastics at 7.5 degrees. Take data in HMS "parasitically" to check scintillator and PID thresholds in trigger.
  • SHMS carbon elastics at 7.5 degrees - will check/establish SHMS tune
 SHMS settings: P=2.214 GeV, Theta=7.45 degrees 
  • HMS threshold scan
 HMS settings: P=1.0 geV, Theta=14.01 degrees
 Take 15 minutes runs at 10 muA with HMS Hodoscopes discriminator thresholds at: 30 mV, 20 mV, 40 mV and 50 mV. (Expert: Simona M.)
 Trigger Threshold Scan: Insert target 0.5% Carbon and take 15 minutes runs at 10 muA with various thresholds for the CER and PRESHOWER/SHOWER PID legs of the trigger (Expert: Eric P.)
     HMS Threshold Scan
     Run 1) CER 40, PRSH-LO 40, PRSH-HI 60, SH-LO 40 ---> These are the initial settings
     Run 2) CER 30, PRSH-LO 30, PRSH-HI 50, SH-LO 30
     Run 3) CER 25, PRSH-LO 25, PRSH-HI 40, SH-LO 25
     Run 4) CER 20, PRSH-LO 20, PRSH-HI 30, SH-LO 20
     Run 5) CER 15, PRSH-LO 15, PRSH-HI 20, SH-LO 15
     Run 6) CER 10, PRSH-LO 10, PRSH-HI 10, SH-LO 10
     SHMS Threshold Scan
     Run 1) HGCER 40, PRSH-LO 40, PRSH-HI 60 ---> These are the initial settings
     Run 2) HGCER 30, PRSH-LO 30, PRSH-HI 50
     Run 3) HGCER 25, PRSH-LO 25, PRSH-HI 40
     Run 4) HGCER 20, PRSH-LO 20, PRSH-HI 30
     Run 5) HGCER 15, PRSH-LO 15, PRSH-HI 20
     Run 6) HGCER 10, PRSH-LO 10, PRSH-HI 10