Commissioning and running of sPHENIX

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

Minutes shift change 2023-05-02

general

—————

- yesterday have submitted for approval to IRR, still with IRR: question regarding electrical connectors

- scaffolding boards have been painted on one side, now drying

- paint other side tomorrow (We)

- dry by Th evening

- plan was to put scaffolding back on Friday morning

- but now CAD wants to keep scaffolding out until BHSO approval:  does not sound like a good idea to me b/c of indefinite time scale

- magnet inspection Fr 11-12

- liquid nitrogen will come Friday to fill dewar

access to bore wait list

———————————————

iHCal, EMCal, INTT, TPOT, MVTX (not available Friday)

evening:  Genki

- busy shift

- four audio alarms, three of those triggered by EMCal dura chillers, low reservoir level

  - contacted Joel and Lee

  - solution at the time was to acknowledge with vision application (not obvious)

  - Lee worked on a fix today

  - fourth alarm racks 1W1, 1W2

    - acknowledged

    - couldn’t turn on 1W2
    - breaker was off

    - according to Joel already off

night:  Hanpu

- 5:00am TPC/TPOT coolant empty alarm

  - outgoing shift crew confirmed not a serious problem

- 6:00am EMCal filter removed alarm

  - acknowledged

- EMCal SiPM voltage question

  - Cameron:  will be updated in checklist

  - Sean:  currently still in expert mode

day:  Sookhyun

- quiet morning

- 10:00am INTT work on 2W1 and 2W3 and bias testing North and South side

- 11:30am plug door test

- same chiller alarm, acknowledged

- tested audible INTT alarms

MBD (Abdul)

- finished HV GUI, will pass to shift crew soon

- Sal finished FEM boards

- plugged in FEM boards

- working on stabilizing laser time

HCal (Hanpu)

- Dan Richford fixed sector 31, ch 5 which had no LED signal, changed backplane

  - still need to check after we get HCal back from Martin

  - Martin:  tested what he was working on yesterday, not there yet, need another evening, hopefully will hand to Hanpu before his shift

Emcal (Sean)

- waiting for access to bore to fix channels

- Anthony working on bias voltage

- Rob working on insulating SiPM cooling lines

TPOT (John K)

- waiting for bore access

TPC (Jin)

- consistently taking pedestal data also with TPOT

- Takao updated automated FEE recovery

- Martin updated decoder, on github

- server updates, 24 GTM connections

- plan for next 24 h:  expect operation in remote expert mode

- shift crew check usual safety items (like temperatures, flow rate) 

INTT (Genki)

- interlock system upgraded filter system for bias

  - tested, working

- debugged LV GUI

 - waiting for rcdaq migration (in progress)

- interlocks not tested yet, not in hands of shift crew yet

MVTX (Cameron)

- rewiring flow switches for remote I/O monitor

  - several flow switches active, others not

  - flow rate has dropped to 1.5 l/m (alert:  at 1.4 l/m)

    - will reach out to manufacturer (stave cooling)

  - investigating wiring of pressure sensors (4/6 stopped working)

  - rack 2E1(currently yellow) hopefully back after that

  - waiting for access 

DAQ

- working on re-write of server that gives us access to DCM2s and partitioners

  - unless you configure system every single time you are not able to start second run

  - related to management of hold and busy

  - will have self diagnostics

- Mickey and Dan L got Lvl1 to produce triggers from laser pulser

  - Dan will try to read out laser data from forced accepts

- 

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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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