sPHENIX HCal discussion

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

Dear All,

Here the minutes of the commissioning meeting today (also on indico):

Best,

Stefan

Justin:

- would be good to take pedestal data

- Anthony, Silas:  that is the plan

Martin:  mapping

- Sean has the mapping of fibers

- Martin will reach out to Tim to get mapping from packets to towers (Action Item)

EMCal start-up---John (see slides)

———————————————————————

- no temperature dependence in the detector

- but with leakage current increasing, bias voltage will change

- capability exists to change bias on the fly depending on current and temperature

- modest annealing observed (as expected)

- evaporation (telnet issue -> error handling)

- Sasha:  is zero suppression fixed threshold or dynamical?

- Martin:  file gets loaded when ADCs are being configured

- John:  future presentation on zero suppression

HCal start-up and health checks—Silas (see slides)

———————————————————————————

- gain balancing and cosmics:  Hanpu is going to present next week

Hanpu:  one towers flip bits only when bias is on and in High Gain

Stefan:  there was an attempt to change preamp board last year, but maybe wrong board was changed.  Will try to change preamp board once more.

- 

---------------------------------------------------------------------------------
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 Feb 26, 2024, at 08:33, Stefan Bathe <stefan.bathe AT baruch.cuny.edu> wrote:

Hello,

After the calibrations meeting, we’ll also have a commissioning meeting:

Select an authentication source indico.bnl.gov

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It would be good to get updates on any commissioning efforts.

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 Feb 23, 2024, at 15:18, Hodges, Anthony <ahodges4 AT illinois.edu> wrote:

* This email originates from a sender outside of CUNY. Verify the sender before replying or clicking on links and attachments. *

Good afternoon folks, 

This upcoming Monday we'll have our next, regularly-scheduled Calorimeter Calibrations meeting at the usual time and place, 11:00AM ET at the following zoom coordinates:

https://bnl.zoomgov.com/j/1617635022?pwd=WmlVME9tcnlTYnlkUC9nU3crNTdRdz09

And the agenda can be found here:

https://indico.bnl.gov/event/22518/

Already on the agenda we have a contribution from Virgile on a study of the EMCal calibration constants and their behavior over the course of the run, but there is still plenty of time for other contributions. So, as always, if you have something you'd like to present, please send Blair or me an email, and we'll add you to the agenda. 

Best, 

-Anthony and Blair

Anthony Hodges, PhD (he/him/his)

High Energy Experimental Nuclear Physics

Postdoctoral Researcher, NSF MPS-Ascend Fellow

University of Illinois Urbana-Champaign

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