Run Planning Meeting Notes, Jan 23-Jan 29, 2020

Trigger Spreadsheet

Trigger Counter

Wednesday, January 29 at 08:45

1. Last 24 hours
   • Beam chopper amplifier replacement, recovery at 11pm
   • Solenoid recovery [1], [2], reached nominal current shortly after midnight
   • New microscope discriminator thresholds [3], [4], [5]
2. Issues
   • DIRC was off [6]
3. Reports
   • Noisy tagger hits solved [7]
4. Plans for today
   • Harp scan
   • Production
   • Diamond alignment?
   • Hall B is down for 3 days for installation starting Thursday morning, possibility for TAC run with our own slit?

Tuesday, January 28 at 08:45

1. Last 24 hours
   • First day of production with 350nA beam current!
   • PS timing window reduced [8]
   • 11:30 Solenoid trip [9], [10], [11], recovered after reset of cryo compressor
   • 03:50 Solenoid trip [12], [13], instability on power supply, investigation ongoing
   • Issues with chopper → almost no beam loss
2. Issues
   • TOF point disappearance after window shift [14], [15]
   • Missing DIRC blocks [16]
   • Event size increase due to CCal [17]
3. Reports
   • Rates [18] (Alexandre)
   • Trigger rates and dead time at 350nA [19] (Sasha)
   • PS multiplicity and timing [20] (Sasha)
4. Plans for today
   • Work on RF instability (~hours) [21]
   • Start diamond alignment afterwards

Monday, January 27 at 08:45

1. Last 72 hours
   • Mostly Production with 250nA beam current
   • Empty target runs with 250nA (71533) and 350nA (71532) on Friday
   • Harp Scan on Sunday [22]
   • CCal Anode Tests on Sunday evening (Sasha) [23]
2. Issues
   • TOF HV [24], [25]
   • Coherent edge at 0deg [26]
   • FDC HV IOC [27]
3. Reports
   • Rates: [28]
   • Energy: [29]
   • TPOL Reference and Converter [30]
4. Tasks for the today
   • Increase beam current to 350nA
     • Switch off low-energy TagH counters (new EPICS configuration file) [31]
   • No beam study / RF recovery planned
   • Diamond alignment later this week

Friday, January 24 at 08:45

1. Last 24 hours
   • Production with 250nA beam current
   • Beam current and position [32], [33]
2. Issues
   • Frozen total PS/FCal rates fixed (Hovanes)
   • Goniometer image missing [34]
3. Reports:
   • Updated sigmas for harp fitting tool [35]
   • Monitoring Plots
   • HOSS Training (David)
4. Tasks for the today and the weekend:
   • Empty target run after the meeting if beam is taken away
   • PS Timing Studies (Friday)?
   • Production
   • CCAL anode study (Saturday)?
5. Monday:
   • Increase beam current to 350nA

Thursday, January 23 at 08:45

1. Last 24 hours
   • Various accelerator problems: Arc PS, Injector, Cavity HV [36]
   • Check-out of PS, TagM, TagH, ST after timing window shift [37], [38]
   • Harp Scan [39]
   • Continue production with 250nA beam current
2. Issues
   • Timing shifts after firmware update: [40]
   • PS Timing Window? [41], [42]
   • CDC inner region [43], [44]
   • DIRC@Rootspy glitches [45],[46]
   • Frozen PS/Main trigger rates [47], [48]
   • Update reference plots! [49], [50]
3. Reports:
   • Transmission [51]
4. Tasks for today
   • Production
   • DOE tour in Hall B/C (8:00 - 12:00?)
   • Spin dance (12:00?)
5. Plan for later
   • CCAL anode study?
   • Alternative diamond alignment
   • ST trigger?