RC meeting and Run Plan, Thursday, November 17th

Return to the RC Meeting Calendar

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 11/16 - day 11/17

• Continued production run with polarized He3 target @45uA current (last production run in this morning has polarization 43.9%).
• Eric and Don started Moller measurement starting from 8:30am today. SBS and BB were turned off, and magnetic field in target is adjusted using Helmholtz coil.
• Issue with BCM x10 during Moller Measurement, work around swapping cables (with the help from Simona).
• During beam downtime, Gordon measured the NMR turning on both BB and SBS magnets (around 13:15 and new polarization is 47.8%).
• Gordon also accessed hall to optimize the target during longer beam downtime (around 13:45)

Short term run plan

• Complete the Moller measurement and mini spin dance with 30 mins data taking on -20 and +20 deg in addition to current 0 deg Wien angle.
• Continue production data taking

1. 45uA of beam current | Use ps3=0, ps5=3, ps2=15, rest =-1 | One hour long runs
2. Move the target to the pickup coil position, and do NMR sweep around every 3 hours
3. Return to step 1

Current Issues

• Dump right Ion chamber cabling needs to be changed (Jerry Kowal is aware of this)