sPHENIX HCal discussion

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

Dear All,

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

Regards,

Stefan

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PR and temperature correction--Hanpu (see slides)

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- tile PR distribution significantly narrower for inner than for outer HCal

- run temperature distribution wider for inner than outer HCal

  - Stefan speculated this is b/c oHCal sectors were calibrated in the summer while iHCal sectors in the winter

  - in the summer there is no air conditioning in the 912; so the inside temperature is similar to the outside temperature

  - in the winter there is heating at fixed power (not controlled), so the inside temperature is very different from the outside temperature

  - therefore, when the large roll-up door is opened, the temperature can be changed much more in the winter than in the summer

- sector 29 has no calibration data in the South (retaken since)

- sector 5 has its first run marked as questionable in the elog (verified as good since)

Rotation test--Shuhang (see slides)

————————————————————————

- sector 12 was rotated 45 degrees to take calibration data (see figure)

- similar energy cut needed also in this position to remove low energy peak

- previous week’s plot had bug; now peak position in rotated position higher (not lower), but peak still narrower

iHCal simulation—Ejiro (verbal update)

—————————————————————————

- started to work on simulation

- going to give update at next meeting

 

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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 Jan 10, 2022, at 11:53, Stefan Bathe <stefan.bathe AT baruch.cuny.edu> wrote:

Dear All,

(Please excuse the late announcement.  I was hoping we’d have settled on a time slot for the new joint meeting by now.)

We’ll have our next HCal Calibration Meeting today at 4:00pm:

https://indico.bnl.gov/event/14117/

(Zoom info below)

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

Regards,

Stefan

ZOOM INFO:

Stefan Bathe is inviting you to a scheduled Zoom meeting.

Topic: HCal Calibration
Time: This is a recurring meeting Meet anytime

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Meeting ID: 817 4933 0526
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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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