sPHENIX HCal discussion

[Xiaochun He <xhe AT gsu.edu>]

Dear Bill,

You got one step ahead of me as many times before. I was about to make a comment since Tony didn't include hcal-list in his message. 

I also think that HCal is the best device for providing the cosmic trigger. 

Best,
Xiaochun

Xiaochun He

Regents Professor

Department of Physics & Astronomy

Georgia State University

Atlanta, GA 30303

Email: xhe AT gsu.edu

---

From: sPHENIX-HCal-l <sphenix-hcal-l-bounces AT lists.bnl.gov> on behalf of W.A. Zajc via sPHENIX-HCal-l <sphenix-hcal-l AT lists.bnl.gov>
Sent: Tuesday, May 18, 2021 3:46 PM
To: Stefan Bathe <bathe AT bnl.gov>
Cc: sphenix-hcal-l AT lists.bnl.gov <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.

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