Commissioning and running of sPHENIX

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

Minutes shift change 2023-05-03

general

—————

- Begin-Run party Friday noon. Come hungry.

- updated expert list

- any PLC work:  go through Joel, do not go directly to Lee

- still waiting for Alex Tulio for IRR approval

- Cindy forwarded documentation to Mike Lancy, which is next step

- magnet testing should finish late today

evening:  Xuan

- quiet shift

- INTT 2W1 and 2W3 work

- checked flow rates MVTX 1.5 l/m

- durachill notifications 

  - Lee is working on this

- Eric:  EMCal bias voltage on for stability test 

night:  Hanpu

- water leak in INTT chiller

  - with instructions from Joel and Rob turned off machine

  - caused by leak in flow meter

- LV was off, bias was off

  - turned off INTT racks

- 3 audio alarms from EMCAl chillers, old problem, no reason

day:  Sookhyun

- Rachid:  INTT flow meter fixed

  - tested interlock system, LV worked, bias didn’t 

- EMCal 1E1 was off by Cameron for work in MVTX right above

- chiller alarm now tells you where it comes from (thanks to Lee)

MBD (Abdul)

- timed in laser (FPGA card)

- next: fine delay scan to get signal into exact time window 

- then going to replace laser splitter

HCal (Hanpu)

- took cosmic run

EMcal (Sean)

- detector development work (Anthony, Tim): bias

TPOT (Hugo)

- waiting for vGTM (John K:  mapping problem in GTM)

TPC (Jin)

- new firmware and new driver version installed

- TPC pedestal taking, taking data now

INTT

- cooling issue has been fixed (the leaking flow meter)

- data taken with full bias

- interlock system tested and working (L1 interlock system for bias)

- data taken with RCDAQ yesterday

- JH: what fraction of the INTT is on? Rachid: all of it

MVTX 

- PLC system work, no spare for this one, getting it repaired

- broken connection in the cooling on DAQ-1, fixed

- persistent alarm, persistent false alarm (power)

- access request for Friday, not sure if this will be ready (scaffold etc)

DAQ 

- MLP working on a new version of the DCM2 readout (warning: this

will be disruptive! There is no way to make a gentle transition, so it

will take some hand-holding for emcal (I'm using HCal as guinea pig)

- 

---------------------------------------------------------------------------------
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
—————————————————————————————————————————