Commissioning and running of sPHENIX

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

Minutes shift change 2023-05-12

general
—————
- RICH schedule delayed by one day
  - expect sweep later today
  - first beam tonight:  bias off for MVTX, INTT, EMCal
  - first collisions Thursday morning (subject to change)
 
- Cameron:  chiller panel has updated elogging info

- Kin:  approval to operate:  waiting for Mike Clancy, asked for ORE 
document, Cindy sent him, ORE chair had to send another memo to Mike Clancy 
 
- WCC (Chris):  nothing

evening (Raghav)
- TPC air compressor failed last night, fixed this morning by Rob
  - wasn’t obvious where to silence alarm, called Joel

night (Brennan)
- all quiet

Day (Ben)
- mostly quiet
- planned PLC update this morning unexpectedly crashed all racks

MBD (Mickey)
- nothing

HCAL (Virginia)
- Martin successfully ran last night
- today took data for long periods of time
- still issues where DAQ gets stuck or crashes
  - 129,000 events
- other issue:  connect to slow control:  only one connection at a time
  - interference between db and changing things

EMCal (Anthony)
- two issues
  - one MPOD channel tripping with bias voltage:  went away
  - one IB in sector 20:  cannot get to supply bias
    - next time access:  use Sean’s portable sector tester
     - need techs (day shift)

TPOT (Hugo via email)
- There is nothing to report for TPOT operations
- Focusing on LV/HV monitoring and control for shift crew and experts, as 
well as online monitoring.

TPC (Takao)
- HV cable problem was at rack-end connector:  fixed
  - holds 2,000V (awaits test with full voltage (4.5 kV) once we have 
operating gas in detector)
- readout:  Jin took noise data, had TPC meeting an hour ago, Tom suggested 
whether pulsing caused noisy events
  - will investigate tomorrow

INTT (Itaru)
- continuing work on RC_DAQ

MVTX (Cameron)
- mainframe problem fixed by switching to two-phase power (220 V) instead of 
phase-neutral (110 V)
  - problem must be in neutral line
- turned on entirety of MVTX
- checked temperature:
- will turn off at end of day for beam

sEPD nothing

DAQ (Martin)
- first event corrupt problem didn’t occur last night
- GL1 and GTM had priority, confirmed that LL1 working as advertised
  - expectation:  won’t need LL1 lemo cable, will use fiber
- John H:  DAQ fest starting Monday
  - goal:  all detectors running together (GTM global mode) from trigger 
generated in GL1

Trigger (Jamie)
- MBD can provide trigger:  Dan/Mickey
- cosmic trigger:  all trigger boards are in back of ADC crate for HCAl
- test next week:  Dan, Joey
- Chi will do firmware change
- single hit trigger run intermittently
- entire HCal in one board for cosmic trigger
- half of iHCal and half of oHCal in one board:  jet trigger (so that energy 
can immediately be summed)
- could be ready in a couple weeks

ZDC 
- checked coincidences
- with Eric:  fiber connected to rack room

background counters
- Sal working on power supplies
- should finish with panel next week
- have what we need
- then go tunnel
- Damon finished signal cables in tunnel 

- 
---------------------------------------------------------------------------------
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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