sPHENIX HCal discussion

[Martin Purschke <purschke AT bnl.gov>]

Hi Blair,

the last point 3b) (it reads a) twice...) doesn't look right to me. You 
would apply the gain correction as you process the data to write DSTs, 
so those would already have your best shot at DST production time in them.

It is possible or perhaps even likely that you then later get a 
2nd-order correction that you do apply to the DSTs then 
("afterburner"), as long as those are unlikely to make really dramatic 
changes.

It is important that you have the bulk corrections right on the DST 
because a large gain factor variation will affect the initial clustering 
outcome, so you need to do it then. The assumption is that any 
afterburner applied is a small delta that shifts the cluster energy a 
bit but leaves the cluster in itself intact. (And yes, if one was too 
far off, it is better to re-produce the DSTs to avoid that clustering 
going awry).

(As I need to run another track at the workshop it is unlikely that I 
will be able to do more than say what I think needs to happen ahead of 
time... so...)

Best,
        Martin
        

On 11/11/22 14:06, Blair Daniel Seidlitz via sPHENIX-HCal-l wrote:
> Dear Calo Calib Group,
>
> I had some problem with the versioning of the task list and accidentally 
> sent out an old version.  The below link is up to date.  I also 
> subscribed to more lists so you might be seeing this for the first time. 
> See the below emai, if this is the case.
>
> Google Doc:
>
> https://docs.google.com/document/d/16hXvhAFfUnakmuDpn5t2IB00yqS6V2vqB0cKQELvFoQ/edit?usp=sharing
>  
> <https://urldefense.com/v3/__https://docs.google.com/document/d/16hXvhAFfUnakmuDpn5t2IB00yqS6V2vqB0cKQELvFoQ/edit?usp=sharing__;!!P4SdNyxKAPE!Ho-ifDFKQTD0QOfPcxzmeuYDdjBn8ijR87MN1RVoH8T0mOtLR5gRXqq7NgKTvt8RAEDeRtR0Dx24-bIZVIaKHrQkVM_cDuupQiwy1-E$>
>
> Best,
>
> Blair
>
> *From:* Blair Daniel Seidlitz
> *Sent:* Thursday, November 10, 2022 12:08 PM
> *To:* 'sphenix-emcal-l AT lists.bnl.gov' <sphenix-emcal-l AT lists.bnl.gov>; 
> 'sphenix-hcal-l AT lists.bnl.gov' <sphenix-hcal-l AT lists.bnl.gov>; 
> 'sphenix-calibration-l AT lists.bnl.gov' <sphenix-calibration-l AT lists.bnl.gov>
> *Subject:* Commisioning workfest planning for the "calibrations" track
>
> Dear Calo Calib Group,
>
> As discussed during this week’s meeting, I am compiling the task list 
> for the “calorimetry calibrations” track for the commissioning 
> workfest.  I would like your input on this via this google doc that can 
> be edited by anyone.  Feel free to send comments or edit the document 
> directly.  I am hoping you can comment on this in the next few days.
>
> This list is fairly brief due to the narrow scope of this track and also 
> some items/tasks (LED and DB storage of SiPM voltages) will be generated 
> after discissions are made during planned meetings.
>
> Google Doc:
>
> https://docs.google.com/document/d/16hXvhAFfUnakmuDpn5t2IB00yqS6V2vqB0cKQELvFoQ/edit?usp=sharing
>  
> <https://urldefense.com/v3/__https://docs.google.com/document/d/16hXvhAFfUnakmuDpn5t2IB00yqS6V2vqB0cKQELvFoQ/edit?usp=sharing__;!!P4SdNyxKAPE!Ho-ifDFKQTD0QOfPcxzmeuYDdjBn8ijR87MN1RVoH8T0mOtLR5gRXqq7NgKTvt8RAEDeRtR0Dx24-bIZVIaKHrQkVM_cDuupQiwy1-E$>
>
> Thanks,
>
> Blair
>
>
> _______________________________________________
> sPHENIX-HCal-l mailing list
> sPHENIX-HCal-l AT lists.bnl.gov
> https://lists.bnl.gov/mailman/listinfo/sphenix-hcal-l

--
Martin L. Purschke, Ph.D.        ;   purschke AT bnl.gov
                                 ;   http://www.phenix.bnl.gov/~purschke
                                 ;
Brookhaven National Laboratory   ;   phone: +1-631-344-5244
Physics Department Bldg 510 C    ;   fax:   +1-631-344-3253
Upton, NY 11973-5000             ;   skype: mpurschke
-----------------------------------------------------------------------