sPHENIX HCal discussion

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

Dear All,

Here the minutes of last week’s meeting (also on indico):

Regards,

Stefan

Workfest update—Saif (verbal update)

———————————————

- implemented LED code that has been used by Dan into sPHENIX framework

- goal:  simulate LED calibration data

Hanpu—LED fitting and T dependence (see slides)

———————————————

LED fitting

- observed non-gaussian tail in some cases

 T dependence

- T dependence more stable for cosmics runs than for LED runs

- determined new temperature coefficient from cosmics runs:  -3.87 %

- EMCal result was - 3.125 % (based on plot from John Haggerty

- Jingyu had found -3.38 % based on cosmics tests at GSU

   => check with John Haggerty

- Edward:  investigate outliers

Shuhang—LED data analysis  (see slides)

————————————————

- pre- and post-burn-in LED data narrowly correlated

- distribution narrows after T correction

- no strong correlation between LED and cosmics data

  - Stefan:  as expected since LED peak varies a lot channel by channel

- will look into Test Pulse data as well

- will update T correction with Hanpu’s new coefficient

Edward:

- we are now in a position to do gain matching using the LED position and should develop the code for this

- Stefan:  that’s a project of its own

- 

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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 11, 2021, at 13:41, Stefan Bathe <stefan.bathe AT baruch.cuny.edu> wrote:

Dear All,

We’ll have our next HCal Calibration Meeting tomorrow, Tuesday, Oct. 11, after the regular HCal Meeting:

https://indico.bnl.gov/event/13532/

Please let me know if you’d like to present something, and I’ll make an entry for you on the agenda page.

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