Difference between revisions of "Run Planning Meeting Notes, Jan 30-Feb 05, 2020"

Latest revision as of 09:39, 5 February 2020

Trigger Spreadsheet

Trigger Counter

Wednesday, February 5

1. Last 24 hours
   • After RF separator and network issues yesterday morning, a good beam returned at 9:30am.
   • No beam 2:30pm-6:30pm (two vacuum pump failures) [1], [2], [3], [4], [5]
   • HOSS restarted at 6am [6]
   • Production: 3.0B triggers.
2. Issues
   • The last spare turbo pump [7]
   • Easy recovery for the frozen gluon05 didn't work and led to hard reboot. [8]
   • Noisy hodoscope channel [9]
   • HV on FDC:hv:3:c4:4p had to be lowered.
   • BTA from 4pm to 6:30pm: is it BANU or BNA? [10]
3. Reports
4. Plans for today
   • Maintenance day until ~2pm, including 2hrs of NL access - a good opportunity for opportunistic access.
   • Harp scan
   • Production

Tuesday, February 4

1. Last 24 hours
   • No beam: 11pm - 2:30am (beam tunning)
   • Bad beam: since 5am - unstable and shifted by 3mm at AC (5th path separator issues).
   • 9:30am: The latest harp scan [11]
   • About 3.2B production triggers.
2. Changes
   • 2pm: Same AMO reference in RootSpy as in cohbream gui [12]
   • 4pm: A change in the data-taking procedure [13]:
     • MCC should insert a dumplette before each no-beam goniometer movement
     • Two production runs in a row for each radiator configuration.
3. Issues
   • Display dumplette location on goniometer GUI
   • Problems with coherent peak at the start of the swing shift. [14],[15]
   • At 8pm, a number of IOC and DAQ stopped working for about 10 minutes. A network glitch is suspected. [16]
   • Issue with EPICS archiving [17]
4. Reports
   • Ratio of rates from HOSS [18]
   • More on ratio of rates [19]
   • Drifting beam energy [20]
5. Plans for today
   • Production, production and more production.

Monday, February 3

1. Last 72 hours
   • Friday:
     • No beam 10am-12pm (BLA calibration). Opportunistic Hall access.
     • No beam 3pm-4pm (MCC software update).
     • No beam 4pm-11pm (lost vacuum in Hall C transport [21]).
   • Saturday:
     • Goniometer stopped moving sometime between 5am and 3pm. The problem was only noticed at 3pm [22]. As a result, a few runs have unknown diamond orientation [23],[24]
     • Repair work on goniometer from 4pm till 7:30pm (no beam) [25]
     • At 10pm, lost HV on TAGH 121-127 and beam halo. HV crate T8-1-BOT has died and wouldn't boot. Repairs were postponed until next morning [26], [27]
   • Sunday:
     • Night shift took data with TAGH hole [28]
     • No beam 8:15am-9:15pm (ARC8 magnet overheating)
     • 9:30am-10:30am Controlled tagger access by Nick to repair T8-1-BOT [29]
     • Beni conducted ST counter SiPMT tests [30] and raised TOF HV.
     • Finally, beam came back at 9:15pm.
   • Production
     • In all the chaos over weekend, we managed to collect 7.9B triggers. However, 1.9B events have an unknown diamond orientation, and 1.7B tirggers have beam energy hole.
2. Changes
   • Change in TPOL readout [31], [32]
   • New DIRC SiPM TDC reference timing [33] - apparently, it's still not in ccdb.
   • New TOF high voltages [34]
3. Issues
   • TAGM is "immobilized" to keep goniometer moving.
   • TPOL slot 13 channel 3 is always saturated [35]
   • Remote reset cable for T8-1-BOT needs to be repaired.[36]
   • FDC HV channel 2:c4:4p was in constant trip loop and was set to lower HV [37], [38]
   • TOF T:45 20V difference between HV setpoint and readback.
   • Gluon05 needs to be rebooted almost daily.
   • As ususal, new DIRC holes require DAQ reboots.
   • Do we need a dumplette inserted for all goniometer movements? [39]
4. Noteworthy
   • MCC sees our radiator IN & OUT at the same time [40]
5. Reports
   • Ratio of rates [41]
   • Vertex plots for empty target [42]
6. Plans for today
   • Harp scan
   • Production

Friday, January 31

1. Last 24 hours
   • JD70-106 47um diamond alignment till 4pm [43], [44]
   • Ion chambers had to be masked for alignment [45], [46]
   • Production since 4pm (~3.5B triggers)
2. Issues
   • JD70-105 keeps degrading [47]
   • Periodic holes in DIRC occupancy [48]. Any way to recover without full DAQ reboot?
   • "Disappeared" DIRC SiPM TDC [49] - its timing recalibration is not done yet
   • Oh yes, Great Battle of the Mouse for 3 hrs :) [50]
3. Reports
   • More on initial PS enhancement [51]
4. Plans for today
   • We may (or may not) have ~30min for access at 10am
   • Production

Thursday, January 30

1. Last 24 hours
   • Harp scan (~9am) [52]
   • Alignment of JD70-106 47um diamond (9:30am till 6pm) [53]
   • Production at 350nA (since 6pm). About 2.6B triggers collected.
2. Issues
   • DIRC N-board lost connectivity for 30 minutes [54]
   • Gamma radiation at the racks [55]
   • Uncoupling of DIRC and FCAL light censors [56],[57]
   • Online monitoring issues [58] and fixed calibrations [59], [60]
3. Reports
   • Initial PS enhancement Spring 2020 [61]
4. Plans for today
   • Any more work on diamond alignment?
   • Production