Commissioning and running of sPHENIX

[Stefan Bathe <stefan.bathe AT baruch.cuny.edu>]

Minutes shift change 2023-04-16

evening:  Oliver
- ODH alarm in tunnel (not sPHENIX), false alarm due to sensor damage b/c of water leak some weeks ago, b/c of that MCR switched to safety access mode, after that back to restricted access mode (during shutdown can just go in and out), MCR operation coordinator (Ian) came over to check out the associated Access Control alarm we got; he said that should have cleared again -> talk to Lee/Joel tomorrow regarding that alarm

night:  Ejiro
- no real incident except for mouse -> get mouse traps tomorrow

day:  Virginia
- MBD people were working in IR

- power cycled 2E2 per request of HCal expert

- MVTX DAQ1 chiller hot, turned off as per Cameron’s instructions

MBD/ZDC (Mickey)
- HV rack released to experts

- checked noise

- just as bad as before

- cables were sitting on HV cables, split apart, kept grounding separate

- still 10 noisy cables

- did look directly at detector (w/o cables):  then signals fine

- cables going into S parallel to power cable

- also too much tension

- need to re-arrange cables tomorrow with help of cable pullers

  - that will hopefully fix noise issues

HCal (Virginia)
- took cosmics today at lower rate than had been b/c busy not working

- busy not working on forced accept (that’s a bug)

- switched to clock triggers, but busy apparently still not working

EMCal (Dan L, John H)
- Dan was helping Tim with channel mapping yesterday, still working on that

  - on verge of being done, expect more detailed report tomorrow

- all DCM2 groups can be read out save two fiber inputs
- John working on controls of EMCal, unobtrusive as far as data goes

- Sean came in to work on plugging in cables in bore

TPOT (John K)
- DAQ move to final server, ready for Hugo for tomorrow

TPC (John K)
- nothing new, cooling still flowing 2gal/min to South, no leaks, Rob still has to play with North

INTT (no report)
- experts left at 11pm (no status update)

MVTX (no report)

sEPD (no report)

DAQ

- busy doesn’t seem to be working even for clock triggers

- busy has to be implemented also for forced accepts so that detectors can commission independently
- Dan L investigating XMIT group with too large packet

Magnet (no report)

Gas/cooling water (no report)
- noticed that ECW flow dropped from 370 to 270 rpm after rebalancing last Thursday —> ask Peter tomorrow

Plan of the day
- DAQ development

- EMCal work

- no more HCal cosmics data taking until we can solve busy problem

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---------------------------------------------------------------------------------
Stefan Bathe
Professor of Physics
Baruch College, CUNY
and RIKEN Visiting Scientist

Baruch:                                     BNL:
17 Lexington Ave                      Bldg. 510
office 940                                  office 2-229
phone 646-660-6272                phone 631-344-8490
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---------------------------------------------------------------------------------
Stefan Bathe

Professor of Physics
Baruch College, CUNY
and RIKEN Visiting Scientist

Baruch:                                     BNL:
17 Lexington Ave                      Bldg. 510
office 940                                  office 2-229
phone 646-660-6272                phone 631-344-8490
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