RC meeting and Run Plan, Wednesday November 23rd

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RC Meeting Information

Time:at 3:30pm today

  • Location: Counting house conference room

RC Updates

Summary of Swing 11/22 - Day 11/23

  • RadCon assisted to have preliminary assessment of target yesterday https://logbooks.jlab.org/entry/4089408
  • David Hamlette informed in the yesterday afternoon that they cleaned up the target enclosure from one side
  • To be on safe-side, hall was elevated to power permit after RadCon completed their work yesterday
  • RadCon cleaned up the contaminated area more in this morning
  • Bill moved the target ladder to evaluate the status of reference cell and carbon foil, after David allowed to do so
  • Reference cell was okay, but some carbon foils were damaged
  • Bill and Arun are replacing the damaged foils with new foils in presence of RadCon

Short term run plan

  • Complete ongoing target work (carbon foil replacement and reference cell alignment) in presence of RadCon
  • Establish beam to the hall (following the procedure) if ongoing work is completed
  • Integration of SBS GEMS to Main DAQ, and GEMs luminosity scan
  • Take data on H2 reference cell
  • Take run with lower BBCAL threshold (~1 GeV) to accept pions
  • Sieve slit installation on Saturday and then optics (need RadCon??)
  • Prepare to install another cell (target group)


  • Shift schedule unfilled for next week
  • Dump right Ion chamber cabling needs to be changed (Jerry Kowal is aware of it)
  • Two channels of hodoscope have issue https://logbooks.jlab.org/entry/4087074

Hall Access

  • RadCon personnels, William Henry and Arun Tadepalli (target)
  • Carlos Ayerbe (GRINCH)
  • Anuruddha Rathnayake (SBS GEMs)

Summary of GEn data taking

  • 59 out of 141 days (41.84%)
  • Uncorrected accumulated charge on He3: 34.75C out of 232C (14.98%)