sPHENIX EMCal discussion

[John Haggerty <haggerty AT bnl.gov>]

Jin and Abhisek,

Thanks for putting this together, after last week's beamline scare I 
thought maybe we better have a plan that would get us some of what we 
want in short order in case the septa failed completely.

Looking over the list and thinking what we need to get done this weekend 
to confirm that we have everything connected and working to the best of 
our knowledge, I think we should spend most of our time this weekend at 
-8 GeV and take data at

- sweet spot of EMCAL3
- PbGl
- HCAL only
- sweet spot of EMCAL2

in that order, which will debug/verify the hodoscope, the Cerenkov 
counters, our own detectors, and give us some experience with the wire 
chamber data, and would let us exercise new analysis necessary for the 
EMCAL3 (the channel map is new).  It seems to me that ideally, we could 
then produce, albeit with unit calibration constants, resolutions for 
the two EMCAL's and the HCAL alone which could be directly compared with 
last year.

In looking at what we've installed and done, I think it would better 
than trying to start with a big calibration scan, before we have fully 
established that everything is works and we can analyze it as we did at 
the end of the last beam test, and we'll be lucky to get through this in 
a weekend.  Also, it doesn't require a lot of beam development, and 
since the beam has been off for so long, there may be startup hiccups 
when we ask for changed conditions.  -8 GeV seems like a good way to 
start for that reason, and because we have a lot of data from last time 
there.  If we take this, have time to study it, and are ready to go on, 
I think the next thing would be an energy scan in the PbGl.  I didn't 
understand the suggestion in the PbGl item in the wiki to "make sure 
timing peak of the lead glass data is stable with in one BCO."  As far 
as I know, there is no way to synchronize the ADC clock with beam 
events, and I hope that nothing we did in the past relied on the peak 
being in any particular sample.

Also, we will be sharing time for the next few days with T-1068, which I 
believe is development of an SVX4-based Si telescope by groups from KEK 
and Osaka for tests of ATLAS pixel and strip detectors, I would guess 
they'll want 120 GeV protons, and if we wanted to run parasitically with 
them (not sure we have the person-power to do that), we could in 
principle take MIP calibration data with them in the beam, they should 
be pretty low mass.

To make this data widely useful, we'll need to run the production and 
look at it--that can be done remotely if we update the wiki with runs 
that we deem worth analysing.  We'll have to exercise some care in 
changing EMCAL's, since the geometry and channel map are different, but 
the data will look exactly the same unless we do something to identify 
it.  We could change the packet id, I suppose, but that would take the 
HCAL and hodoscope with it.  Also, we have to make some changes to the 
database to account for two emcal's and changes to the hcal controller.

On 1/18/17 3:51 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
>     <mailto:sphenix-hcal-l-bounces AT lists.bnl.gov>> on behalf of John
>     Lajoie <lajoie AT iastate.edu <mailto:lajoie AT iastate.edu>>
>     *Date: *Tuesday, January 17, 2017 at 3:11 PM
>     *To: *"sphenix-hcal-l AT lists.bnl.gov
>     <mailto:sphenix-hcal-l AT lists.bnl.gov>" <sphenix-hcal-l AT lists.bnl.gov
>     <mailto: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 <mailto:lajoie AT iastate.edu>
>
>     Facebook <http://www.facebook.com/john.lajoie.5>LinkedIn
>     <http://www.linkedin.com/pub/john-lajoie/9/a9/bba/>
>     Contact me: Skypejohn.lajoie
>
>
>
> --
>
> *John Lajoie*
>
> Professor of Physics
>
> Iowa State University
>
>
>
> (515) 294-6952
>
> lajoie AT iastate.edu <mailto:lajoie AT iastate.edu>
>
> Facebook <http://www.facebook.com/john.lajoie.5>LinkedIn
> <http://www.linkedin.com/pub/john-lajoie/9/a9/bba/>
> Contact me: Skypejohn.lajoie
>
>
>
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--
John Haggerty
email: haggerty AT bnl.gov
cell: 631 741 3358