[Primexd] [EXTERNAL] Re: BCAL calibration status

Tue Mar 17 17:40:26 EDT 2020

Thank you, it is noted.

tks ig.
________________________________
From: Gan, Liping <ganl at uncw.edu>
Sent: Tuesday, March 17, 2020 5:30 PM
To: Igal Jaegle <ijaegle at jlab.org>; gasparan at jlab.org <gasparan at jlab.org>
Cc: primexd at jlab.org <primexd at jlab.org>
Subject: Re: [Primexd] [EXTERNAL] Re: BCAL calibration status

Hi, Igal,

I would require the same precision as GlueX.

Liping
________________________________
From: Primexd <primexd-bounces at jlab.org> on behalf of Igal Jaegle <ijaegle at jlab.org>
Sent: Tuesday, March 17, 2020 4:48 PM
To: gasparan at jlab.org <gasparan at jlab.org>
Cc: primexd at jlab.org <primexd at jlab.org>
Subject: Re: [Primexd] [EXTERNAL] Re: BCAL calibration status

Liping & Ashot,

Thank you for your explanations. Could you define the precision of the calibration needed? pi0 peak at  134.97 MeV/c^2 +/- 1%, 2%, 3% ...

tks ig.
________________________________
From: gasparan at jlab.org <gasparan at jlab.org>
Sent: Tuesday, March 17, 2020 4:24 PM
To: Igal Jaegle <ijaegle at jlab.org>
Cc: primexd at jlab.org <primexd at jlab.org>
Subject: Re: [Primexd] [EXTERNAL] Re: BCAL calibration status

  Hi Igal,

 We are using the BCAL calorimeter to veto any recoiled particle
 that are in time with the two photon timing. That is to minimize
 the any possible inelastic production of eta-meson from the target
 4He nuclei. The elastically recoiled 4He nucleus can not pass the
 target and reach the BCAL (very low energies).
 So, in order to make a reasonable cut level the BCAL has to have some
 level of calibration. It can even be a very rough calibration but, it
 needs to be calibrated.

 Ashot

> Spokespersons,
>
> We need your inputs to answer the question of Zizis (see below). Basically
> why do we need BCAL calibrated ie all pi0 and eta at the correct mass +/-
> 1 %(?) and for all momenta(?) and for all
> PrimEX-D phase I physics runs?
>
> tks ig.
> ________________________________
> From: Zisis Papandreou <Zisis.Papandreou at uregina.ca>
> Sent: Tuesday, March 17, 2020 9:25 AM
> To: sdobbs at fsu.edu <sdobbs at fsu.edu>; Mark-Macrae Dalton <dalton at jlab.org>;
> Elton Smith <elton at jlab.org>; Igal Jaegle <ijaegle at jlab.org>; Jonathan
> Zarling <jzarling at jlab.org>; Alexander Somov <somov at jlab.org>;
> ksv656 at uregina.ca <ksv656 at uregina.ca>
> Subject: [EXTERNAL] Re: BCAL calibration status
>
> Hello Igal et al:
>
> yes, work is being done: jobs are running on the calibration and MC
> studies are also being carried out.  While we wait for those, this is a
> good time to get "organized".
>
> In our group, we are not sure of what the objectives and priorities are
> for the Primex runs, particularly as they pertain to the BCAL
>
> Igal, can you or Sasha, perhaps make a few slides or write a one-pager,
> explaining those objectives?  It would be good if there were timelines (of
> what you are trying to extract from the data) or the tasks listed in order
> of priority.  We could then go over those at this Thursday's Calorimetry
> meeting.
>
> The reason we ask for this is that the Regina crew has other tasks on
> their plates and we should optimize our collective operations.  In
> parallel, Karthik and Varun are studying to take their Ph.D. Comprehensive
> exams in May.
>
> Thanks and best regards, Zisis...
>
>
>
> Dr. Zisis Papandreou
> Head, Department of Physics
> Professor of Physics, Ph.D, P.Phys.
> ---------------------------------------------------------
> Department of Physics
> University of Regina
> 3737 Wascana Parkway
> Regina, SK  S4S 0A2     CANADA
>
> Phone: (306) 585-5379
> Fax: (306) 585-5659
> Email:  zisis at uregina.ca<mailto:zisis at uregina.ca>
> Website:
> https://www.uregina.ca/science/physics/people/faculty-research/zisis-papandreou/<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.uregina.ca_science_physics_people_faculty-2Dresearch_zisis-2Dpapandreou_&d=DwMFaQ&c=CJqEzB1piLOyyvZjb8YUQw&r=09G0_vNCJcXuzy4NWhn5xA&m=U7L4cM9ddlQCq5yqk3vWCpavDnycdGhqcrxMlnEog30&s=J7USysbdKiCvthhYBk41ZwOhIoOL__BaE74kfELv1zQ&e=<https://urldefense.proofpoint.com/v2/url?u=https-3A__nam05.safelinks.protection.outlook.com_-3Furl-3Dhttps-253A-252F-252Fwww.uregina.ca-252Fscience-252Fphysics-252Fpeople-252Ffaculty-2Dresearch-252Fzisis-2Dpapandreou-252F-25253Chttps-253A-252F-252Furldefense.proofpoint.com-252Fv2-252Furl-253Fu-253Dhttps-2D3A-5F-5Fwww.uregina.ca-5Fscience-5Fphysics-5Fpeople-5Ffaculty-2D2Dresearch-5Fzisis-2D2Dpapandreou-5F-2526d-253DDwMFaQ-2526c-253DCJqEzB1piLOyyvZjb8YUQw-2526r-253D09G0-5FvNCJcXuzy4NWhn5xA-2526m-253DU7L4cM9ddlQCq5yqk3vWCpavDnycdGhqcrxMlnEog30-2526s-253DJ7USysbdKiCvthhYBk41ZwOhIoOL-5F-5FBaE74kfELv1zQ-2526e-253D-26data-3D01-257C01-257Cganl-2540uncw.edu-257C5278944e0d474988491b08d7cab49dac-257C2213678197534c75af2868a078871ebf-257C1-26sdata-3D6Aj9AN5yvajqUEld5I65XgjWvnqTzrK0rTv4noCaYQo-253D-26reserved-3D0&d=DwMFAg&c=CJqEzB1piLOyyvZjb8YUQw&r=09G0_vNCJcXuzy4NWhn5xA&m=Lqc-jKZh59Qe1rbJh-xatlQ-CAQZ6Vj5KNVZCgTO1lE&s=TMLrSm8x1ON0VVRaNMiyGYaxt6XvhMAYdmsc25SAC-s&e=>>
>
>>>> Igal Jaegle <ijaegle at jlab.org> 03/17/20 3:59 AM >>>
> BCAL colleagues,
>
> Do you have any news for the BCAL calibration of the PrimEX-D
> measurements?
>
> tks ig.
> _______________________________________________
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>

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