sPHENIX EMCal discussion

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

Hi, John and Martin

 

Thanks for the lots of work initiating the test. 8-GeV scan sounds like a good plan. And I think Martin's marker packet in PRDF will be very useful for analysis too (good to have a copy in numerical format too).

 

> 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." 

 

Hmm. I guess I should say move the PbGL signal earlier in the sample train. In the past run 2016, the PbGL was recorded with peak around sample 15-21. Almost for all events, the tail of ADC spectrum just fall off the cliff beyond max sample of 24. Although one can still fit for the max, this prevented us to perform an analysis of 1100V to 1200V comparison by just integrate the ADC count (although signal shape could change between two HV settings, presumably the ADC integral remain the same.). Example 2016 data shown below.

 

Therefore, the request I meant is to move the PbGL trigger to come 100-150ns later, so we could sample the whole curve. Wiki updated.

 

 

> 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 analyzing. 

 

A wiki run list will be useful. Just chat with Chris, that we will setup a new code base for prototype-3 analysis and decouple it with prototype-2. A channel map will be useful in setting up the PRDF unpacker. Most other infrastructure should be similar. When production is setup, I also need to work on the analysis tutorial ...

 

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

______________________________

 

 

> -----Original Message-----

> From: sphenix-hcal-l-bounces AT lists.bnl.gov [mailto:sphenix-hcal-l-

> bounces AT lists.bnl.gov] On Behalf Of John Haggerty

> Sent: Friday, January 20, 2017 6:18 AM

> To: sphenix-hcal-l AT lists.bnl.gov; sphenix-emcal-l AT lists.bnl.gov

> Subject: Re: [Sphenix-hcal-l] Test beam data wish list

>

> 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#EMC

> al_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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> > Sphenix-hcal-l AT lists.bnl.gov

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> >

>

>

> --

> John Haggerty

> email: haggerty AT bnl.gov

> cell: 631 741 3358

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