sPHENIX EMCal discussion

[woody <woody AT bnl.gov>]

Hi Jin,
  I think your wishlist for the standalone EMCAL runs is very good. The only thing I would change is that we should make the EMCAL position scan (item 3 on your list) HIGH priority (actually VERY HIGH priority) since this will tell us how the position dependence affects our energy resolution. I think it's also particularly important to scan both regions of the detector with the two different light guides and study the difference between the two. We will need this information in order to know how to proceed with building the next full scale prototype and what type of light guides we will use on it, which will affect the mechanical design and also presumably determine the performance of the final calorimeter. I think this is one of the most important things we need to measure in this test beam run.
  My only other question is regarding item 5 which you list as a scan with negatively charged hadrons. We won't have the Cherenkovs in the trigger so we'll collect both electron and hadron data at the same time, so the hadron data should be included in item 4. Also, when you say tilt angle, do you mean to tilt the detector in the vertical direction ? Otherwise, this item looks nearly identical to the item 4 where the detector is rotated in the horizontal plane.  However, for the new 2D projective prototype, it's not possible to rotate the detector in the vertical direction since it's fixed in its frame with no rotation motor. Did you perhaps mean this scan was for the old 1D projective prototype ? If not, we should also add that to the list. The 1D prototype now only rotates in the vertical direction (there is no "lazy susan" in the horizontal direction), so we can tilt it 10 degrees in the vertical plane, but unfortunately all of our data from the last run was with a 10 degree horizontal rotation. Nevertheless, I think if we want to further study the position dependence of the old prototype, this will be the only way we can do it.

Cheers,
Craig   

On 1/18/2017 4:51 PM, Huang, Jin wrote:

Hi, Everyone

 

In the HCal meeting today, John Haggerty asked Abhisek and I to come up with a wish list for key measurements for the on-going beam test.

 

Please find a draft EMCal data wish list at this link: https://wiki.bnl.gov/sPHENIX/index.php/2017_calorimeter_beam_test#EMCal_Standalone_Data . Seven data set was rated high, mid and low. Welcomed to give suggestions or edit the list on wiki.

 

Cheers,

 

Jin

 

______________________________

 

Jin HUANG, Ph. D.

 

Associate Physicist

Brookhaven National Laboratory

Physics Department, Bldg 510 C

Upton, NY 11973-5000

 

Office: 631-344-5898

Cell:   757-604-9946

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From: sphenix-hcal-l-bounces AT lists.bnl.gov [mailto:sphenix-hcal-l-bounces AT lists.bnl.gov] On Behalf Of John Lajoie
Sent: Tuesday, January 17, 2017 5:54 PM
To: Lynch, Don <dlynch AT bnl.gov>; sphenix-hcal-l AT lists.bnl.gov
Subject: Re: [Sphenix-hcal-l] HCAL bi-weekly meeting

 

Hi Don,

    Thanks for the update!  I certainly appreciate that you want to keep the engineering meeting tight, but I'll look forward to poking through the slides.

John

 

On 1/17/2017 4:51 PM, Lynch, Don wrote:

Hi John,

 

We won’t have any Engineering input for tomorrow’s meeting, as we are meeting with Walt Sondheim on MAPS parameters at the same time. We do have a BNL internal Calorimeter engineering meeting on Friday to go over Anatoli’s latest analyses, Rich’s current light collection design status and general engineering issues for finalizing HCal mechanical design (steel, light collection, etc., inner and outer) and advancing the EMCal mechanical design.

 

We are not putting this on bluejeans, as we want to keep the engineering discussion tight, but we will post some slides on Indico.

 

- Don Lynch

 

From: <sphenix-hcal-l-bounces AT lists.bnl.gov> on behalf of John Lajoie <lajoie AT iastate.edu>
Date: Tuesday, January 17, 2017 at 3:11 PM
To: "sphenix-hcal-l AT lists.bnl.gov" <sphenix-hcal-l AT lists.bnl.gov>
Subject: [Sphenix-hcal-l] HCAL bi-weekly meeting

 

Dear HCAL'ers:

    It's been a while, but we will resume our bi-weekly HCAL meetings this coming Wednesday, Jan 18th, at 2:30PM BNL time.   The agenda is evolving here at:

https://indico.bnl.gov/conferenceDisplay.py?confId=2762

I'm hoping we can get an update on the test beam, and maybe some additional contributions.

Regards,
John

--

John Lajoie

Professor of Physics

Iowa State University

 

(515) 294-6952

lajoie AT iastate.edu

Contact me: john.lajoie

 

--

John Lajoie

Professor of Physics

Iowa State University

 

(515) 294-6952

lajoie AT iastate.edu

Contact me: john.lajoie

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