RC meeting and Run Plan, Tuesday November 22nd
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Contents
RC Meeting Information
Time:at 3:30pm today
- Location: Counting house conference room
- Join ZoomGov Meeting
- https://jlab-org.zoomgov.com/j/1619032184?pwd=aWhTVWxya1ZZQzA1K2ZPSTd2ZX...
- Meeting ID: 161 903 2184
- Passcode: 260715
- Dial by your location
- +1 646 828 7666 US (New York)
- 833 568 8864 US Toll-free
RC Updates
Summary of swing 11/21 - day 11/22
- Maintenace in South linac scroll/turbo pumps and then 2L17 HV issues [opportunistic EPR calibration completed around 5 pm] yesterday
- Beam checkout completed around 10 pm yesterday, and then continued production run on polarized He3 target @45uA beam current with prescale: ps3=0, ps5=3 and all other -1
- TO reported the issue of fiber temp above alarm limits around 6:30 am today
- Arun and Bill tried to fix target issue remotely
- TO did NMR while Bill was working on oven temperature with his approval
- Target Polarization was only 1.6% after NMR, so contacted Bill again
- Bill and Arun believed that there is some issue with target, so decided to go to controlled access (around 10 am)
- RadCon assisted to have preliminary assessment https://logbooks.jlab.org/entry/4089408
- We are still controlled access and shift crews (day and swing swift) are standby
Short term run plan
- Access the conditions inside the target enclosure, and install another cell
- Integration of SBS GEMS to Main DAQ
- GEMs luminosity scan
- Change in coincidence window size
- Take run with lower BBCAL threshold (~1 GeV) to accept pions
Issues
- 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 Request
- William Henry (target)
- Sean Jeffas (GEMs)
- Jiwan Poudel (trigger)
- Anuruddha Rathnayake (GEMs)
- Carlos Ayerbe (GRICH)
Summary of GEn data taking
- 58 out of 141 days (41.13%)
- Uncorrected accumulated charge on He3: 34.75C out of 232C (14.98%)
