sPHENIX HCal discussion

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

Dear All,

Here are the minutes from today’s meeting, including the link to the new calorimeter wiki page (also on Indico).  The next meeting will be in two weeks.

Best regards,

Stefan

—

Sean:  SiPM temperature study

- single pixel peak analysis upcoming (UIUC student)

- would be nice to chill ECW going through EMCal from 18 C down to 10 C; independent system?

From Eric:

- bias modules hopefully back soon from manufacturer

- bent pins one digitizer crate:  they were going to install it; Eric out tomorrow, power up boards

  - Dan Lis:  test

- Anthony's talk

  - dead areas are ADCs; Eric is working on this with Anthony and Sean; will reach out to HCal group if they need more help

Emma:  meeting with Chi to repair electronics

mostly to learn how to run different tests for electronics boards

- compile spare board that are available

- compile list of hot channels and decide what needs to be replaced

Hanpu:  gain balancing

- machinery exists for HCal and has been successfully tested last run

- Blair:  do with 1-h cosmics run

  - iHCal:  Hanpu will analyze recent cosmics data to see how much data would be needed

  - EMCal:  gain balancing should be based on pi0 peak position; this can be combined with HCal software to find bias offset

  - goal is to balance gains of both calorimeters next run

Martin:

- should take stock of what we believe and what we actually know

- e.g., "bit flip is configuration issue" (Martin thinks it's not.)

- come up with compendium of slides for documentation

- analysis note or rather wiki page

- created "Calorimeter" wiki page and linked to it from HCal page:

https://wiki.sphenix.bnl.gov/index.php/Calorimeter

- 

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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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On Oct 16, 2023, at 10:53, Stefan Bathe <stefan.bathe AT baruch.cuny.edu> wrote:

Dear All,

Just a reminder that we are meeting today right after the calibrations meeting.

Select an authentication source indico.bnl.gov

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Best regards,

Stefan

- 

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

On Oct 11, 2023, at 12:43, Stefan Bathe <stefan.bathe AT baruch.cuny.edu> wrote:

Dear All,

Here are the minutes from today’s meeting (also on indico).
We decided to have the meetings after the calibrations meeting, starting next Monday with two talks already on the agenda:  https://indico.bnl.gov/event/20840/

Best regards,
Stefan
----

Minutes Oct 11 Calo Commissioning Meeting
   • Meeting after calibrations meeting (maybe bi-weekly?), separate agenda
   • Only calo experts, not EMCal vs HCal
   • HCal support during shutdown to assist TPC
       • Sharing among experts
   • Invite sEPD, ZDC/SMD, MBD
   • ADC repair re hot towers:  meeting:  Columbia, Colorado, Chi
   • LED:  Silas, Munir (see Monday’s calibration meeting), JaeBeom in touch with Munir regarding hot towers in LED → analysis discussion in calibrations meeting; link to Munir's talk from Oct 9:  https://indico.bnl.gov/event/20787/contributions/81778/attachments/50288/86003/LED%20Analysis%20Oct%209th.pptx
       • Also talk by Emma from Sep 25:  https://indico.bnl.gov/event/20659/contributions/81211/attachments/49967/85510/hcal_hot_towers_9_25.pdf
       • Find references and add to this agenda
   • Regular running of LED, TP, pedestal for both HCal and EMCal once per week (starting once ADC repair is done?) and discuss hardware health in this meeting
   • HCal hardware in good shape, no repairs needed (modulo ADC)
   • Hardware related pathologies in EMCal→future presentation by Anthony
   • EMCal South High Rapidity:  plan for instrumentation?
       • Eric:  sEPD order coming in, but not sure whether there will be enough boards
           • Coming in mid to late October (see Eric’s summary to DAQ list)
           • sEPD needs 12 boards, probably ordered 16, have 8 spares (makes total of 24), need 16 to complete high eta region, so should have enough; so the question is about repairs/replacements/spares
       • No contract in place to build more boards
       • Bill:  should be available for Run 3, but not Run 2
   • Eric:  EMCal:  one ADC crate with broken backplane (3C1, crate 3; i.e. NorthEast) will be replaced
   • Sean analyzing controller data (temperature)-->present
   • Anthony:  lowered SiPM cooling as a test to see whether single pixel peak can be re-gained→need analyzer (have code):  UIUC
   • Gain balancing→talk to Hanpu
   • Track task link from previous meetings:  https://docs.google.com/spreadsheets/d/1PGq8SnaneIhQNIBq1VYVCAOdVe7QmQVXHvgQtjheojg/edit#gid=0
   •  
-
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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
----------------------------------------------------------------------------------

On Oct 10, 2023, at 20:00, Stefan Bathe <stefan.bathe AT baruch.cuny.edu> wrote:

Dear All,

As announced last week, we are brining back the calorimeter commissioning meeting tomorrow at 9:00am.  Let me know if you’d like me to create an agenda item for you.

Best regards,
Stefan

https://indico.bnl.gov/event/20789/

https://indico.bnl.gov/event/20789/



Topic: sPHENIX calorimeter commissioning
Time: This is a recurring meeting Meet anytime
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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
----------------------------------------------------------------------------------