sPHENIX EMCal discussion

["Huang, Jin" <jhuang AT bnl.gov>]

Hi, Craig

Thank you for the immediate response. 

> the EMCAL position scan (item 3 on your list) HIGH priority (actually VERY 
> HIGH priority)

Sure. Updated. 

It take some time to do the scan, therefore, I thought get a resolution curve 
of 2-D projective towers can be done first, which is first of its kind.


> 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. 

The request was to perform scan column 2 to 7 and row from 2 to 7, which 
covers both regions. 


> 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.

Correct. Item 5 adds more statistics to item 4 in three energy points to 
bring additional statistics in hadron sample. We run out of statistics in the 
last beam test. 


> when you say tilt angle, do you mean to tilt the detector in the vertical 
> direction ?

I meant horizontal direction rotation by 10 degree. Difference between items 
5 and 4 are statistics. 


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
______________________________

From: woody [mailto:woody AT bnl.gov] 
Sent: Wednesday, January 18, 2017 6:17 PM
To: Huang, Jin <jhuang AT bnl.gov>
Cc: sphenix-hcal-l AT lists.bnl.gov; sphenix-emcal-l AT lists.bnl.gov
Subject: Re: [Sphenix-hcal-l] Test beam data wish list

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
______________________________
 
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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