RC meeting and Run Plan, Wednesday Oct. 17
From HallCWiki
Status
- Beam Quality Bottom line:
- Yesterday, accelerator had issues getting a good beam back after RF recovery. They finally settled on 50uA as maximum stable current, and we requested 45uA to limit the SHMS singles rate to below 700kHz in the current setting.
- Today around noon accelerator went down to fix some more Hall B related issues, as well as do some work on the accelerator.
Issues: Resolved
Issues: Requiring attention
Ongoing
Requests
- Hall D needs opportunistic 1shift of HallC down for beam studies, not pressing right now (needs to be done before end-of-run)
- Might be possible when need access for deuterium target.
- Dave Meekins needs access to work on deuterium target Monday starting 8am
- It will take ~4 hours
- Swapping out aerogel will be Tuesday during RF recovery
Plans - Physics
- Run 2-3 more shifts with Q2=5.5. W=3.02 x=0.40 theta_Shms=6.49
- Currently collected 26% of statistics + Al data in 3.25 shifts
- Can run up to 45uA in this setting
- Wednesday-Friday: Run 5 shifts with Q2=5.5. W=3.02 x=0.40 theta_Shms=9.56
- Collect at least 50% of statistics goal
- Friday-Saturday: Run 4-5 shifts with Q2=5.5. W=3.02 x=0.40 theta_Shms=12.56
- Match statistics for the theta_Shms=6.49 point
- FINALLY: 4-6 shift buffer
- Is this enough buffer?
- Wishlist of settings to revisit?
