sPHENIX HCal discussion

[Stefan Bathe <bathe AT bnl.gov>]

Hi John,

Yes, Jamie asked me about this last week and suggested to bring up the cosmics trigger question at today’s meeting.  Jamie’s/Dennis’s student Dan Lis was at the meeting today.

Regards,

Stefan

On May 18, 2021, at 5:40 PM, Lajoie, John G [PHYSA] <lajoie AT iastate.edu> wrote:

Folks, 

 

A question that has come up before is “does sPHENIX have a cosmics trigger”? I don’t know if this will require a special version of the trigger firmware for the oHCAL or if the thresholds be set low enough that the physics trigger will work well enough. 

 

I pitched this to Jamie and he has a grad student looking into this with simulations similar to what Ejiro is doing, so we should certainly bring them into the calibrations discussions.

 

John

 

John Lajoie

he, him, his

Professor of Physics

Iowa State University

 

(515) 294-6952

lajoie AT iastate.edu

 

From: sPHENIX-HCal-l <sphenix-hcal-l-bounces AT lists.bnl.gov> On Behalf Of W.A. Zajc via sPHENIX-HCal-l
Sent: Tuesday, May 18, 2021 2:47 PM
To: Stefan Bathe <bathe AT bnl.gov>
Cc: sphenix-hcal-l AT lists.bnl.gov
Subject: Re: [Sphenix-hcal-l] HCal muon calibration meeting Tuesday, May 18, 11:00am

 

Hello all:

 

Thanks for the very informative discussion and presentations today.

 

On the topic of cosmic triggers / calibrations for the assembled detector:

 

1) Brian Cole said this was valuable/essential for ATLAS pre-commissioning and calibration.

 

2) Tony Frawley just posted a message to sPHENIX-tracking-l , Subject “Tracking system alignment” where he summarized discussion at today’s software meeting. In particular, he wrote

 

 

———————————————————————————————————————————————————————

B) I think we agreed that:

Experts from the three subsystems should implement the scheme to de-align their detector.

--- Decide which elements will be moved from their ideal position, and in what coordinates.

--- implement the alignment map, and use it in construction of the detector model in simulations.

Tracking experts will develop code that can be used to align the detectors.

--- Using cosmics.

--- Using collision data.

———————————————————————————————————————————————————————

 

Please note that “de-align” their detector is referring to simulations ;-)

 

Best regards,

Bill 

—————————————————

W.A. Zajc
I.I. Rabi Professor of Physics
Columbia University
New York, NY 10027

 

https://blogs.cuit.columbia.edu/waz1/
—————————————————

 

On May 18, 2021, at 10:03 AM, Stefan Bathe via sPHENIX-HCal-l <sphenix-hcal-l AT lists.bnl.gov> wrote:

 

Hello,

 

Just a reminder for the meeting today.

The zoom info is in the previous email and on the indico page (hover over the location icon).

 

Regards,

Stefan

 

 

On May 13, 2021, at 9:54 AM, Stefan Bathe <bathe AT bnl.gov> wrote:

 

Dear All,

 

A few weeks ago, several of us have started to get together informally to work on the HCal muon calibration.  To make this more inclusive, we decided to announce this on the list.  We will try to meet regularly in the HCal meeting time slot on Tuesdays, 11:00am, on the off weeks—at least for the near future.  So we’ll meet again next Tuesday, May 18, at 11:00am:

 

https://indico.bnl.gov/event/11854/

 

The purpose of this effort is two-fold:

 

1) Analyze the cosmics calibration data taken in 912 and see if we can understand them, and also use them for detector QA before the HCal installation.

2) From those data, translate the ADC response of the detector to cosmic muons to energy with help of a Geant simulation. 

 

Regards,

Stefan

 

--

 

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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