Run Planning Meeting Notes, Feb 06-Feb 12, 2020

Wednesday, February 12

1. Last 24 hours
   • Production runs @350nA
   • Harp scans
   • Re-calibration of Hall D ion chamber for AMO (see reports)
   • 5.1B evts collected
   • No beam since ~08:00
     • Hall currently in controlled access
     • Beni went into hall to work on CDC boards
2. Issues
   • During owl shift: CDC: channel H:24 tripping -> Turned it off and ramped it up again
   • CDC hot channel[1] (-> Meant to discuss yesterday, but forgot to include into agenda)
   • Noisy channels in CDC [2]
   • FDC Occupancy x=17 [3]
3. Reports
   • Harp scans: 5C11, 5C11B, HALO:T:electron:tag
   • Re-calibration Hall D ion chamber [4], [5]
4. Plans for today
   • When beam is back: Production runs @350nA
5. RC weekly report (coming soon)
6. Acknowledgements: Thanks to the hall D crew (staff, operators, shift takers, ..), MCC and RadCon

Tuesday, February 11

1. Last 24 hours
   • Beam taken away at 08:30
     • Work in hall
     • Walkthrough
   • Beam was availabe at 12:30 -> Continued production runs @350nA
   • 3.8B evts collected

1. Issues
   • FDCHit Wire time ([6]) -> Observed only in runs: 71774-71777

1. Reports
   • DIRC water leak ([7])
   • PS Enhancement Spring 2020 ([8])
2. Plans for today
   • Harp scans
   • Production runs @350nA
   • Wednesday during day shift: Polarization change for Hall A ([9])

Monday, February 10

1. Last 72 hours
   • Friday
     • Beam sent to hall around 08:30
     • Harp scans
     • Prodcution runs @350nA until 23:50 -> no beam until the next morning
   • Saturday
     • Beam sent to hall around 12:00
     • Harp scans (requested by MCC)
     • Prodcution runs @350nA
     • Found high rates in high photon tagger counter (see issues)
     • Had to request beam tune -> Unusal tagger rates + ION chamber trips (see: [10])
   • Sunday
     • Prodcution runs @350nA
     • Harp scans
   • Collected ~6.5B evts over the weekend
2. Issues
   • Variation in PS and main trigger rates over the weekend ([11],[12],[13])
   • High rates in high photon tagger counters (energy distribution, harp scan electron, harp scan gamma, epics after tune)
3. Reports
   • Coherent edge postion vs time [14]
   • Initial PS enhancement [15], [16]
   • Beam downtime due to ioc (see: [17] for details)
   • Harp scan results:
     • Friday: 5C11, 5C11B,HALO:T:electron
     • Saturday: 5C11,5C11B, HALO:T:electron
     • Sunday: 5C11, 5C11B, TAGH:A:3
4. Plans for today
   • Beam off, starting 08:30
   • Continue production runs once beam is back

Friday, February 7

1. Last 24 hours
   • Production runs @350nA until 14:00
   • Hovanes worked on diamond position for JD70-105 0/90 (see reports)
   • Continued data taking until 18:15
   • Connection issues with rocDIRC -> Bill, Sergey and network expert on call had to work until late night to fix the problem
   • Accelerator crew was having network issues too
   • Hall went into beam permit around 1:15am
   • Accelerator crew having trouble with control system (see issues)
2. Issues
   • DIRC cart leaking (see: [18])
   • Problems with 1L12 and 2L24 (see: [19])
   • Accelerator site having problems with IOCs in alarm handler (see: [20])
3. Reports
   • New diamond position for JD70-105 0/90 (see: [21],[22])
   • Communication problems with rocDIRC (see: [23],[24],[25])
   • Network problems on accelerator site (see: [26],[27])
4. Plans for today
   • Production runs
   • Access to hall ?
5. Plan(s) for next week
   • Monday: Hall A will change setup for pol. meas. -> No beam from ~ 8:00 on (see: [28])
6. No meeting this weekend -> Next meeting: Monday, Feb 10

Thursday, February 6

1. Last 24 hours
   • Beam was sent to hall at 19:51
   • Harp scans (see reports for details)
   • Production runs @ 350nA
   • Collected 1.8B events
2. Issues
   • DIRC temperature alarm (resolved, see: [29])
   • Swing shift reported coherent peak for JD70-105 0/90 PARA to be unusually wide -> No such observations for other settings
3. Reports
   • Harp scan results: acc: 5C11,acc: 5C11B, Hall D: TAGH
   • Test of DIRC communication algorithm (see: [30])
   • Missing optical links in DIRC (see: [31])
4. Plans for today
   • Production runs