[PRad] HyCal test plan this week

gasparan at jlab.org gasparan at jlab.org
Tue Jul 25 05:35:17 EDT 2023

  Hi Eugene,

 What I wanted to say in my previous email is the following (in a more
 opened up manner:
 1) the Hycal "repair" work needs very specific knowledge of all elements
    of the detector. The last three experiments reached the highest
    accuracy since we did prepare the HyCal in a perfect form with
    minimizing any risk of harming the detector.
 2) The first question on our way is to (a) identify the HyCal upgrade
    level (not the FADC and DAQ). From this depends what and WHEN we
    have to start work on HyCal (example, if we get funds for PbWO4 then
    Hycal will need to disassemble and reassemble again); (b) what is the
    sequence of running the approved experiments? This can be done only
    in this Fall with the Hall B and Physics Division leaders.

 Just to remind the HyCal needs for our experiments:
    a) PRad-II, needs HyCal upgrade (partial or full);
    b) X17_search, does not need HyCal upgrade (it was designed like that
       to run earlier. Will benefit fron the upgraded HyCal, for sure).
    c) pi0 TTF, different statements on HyCal, needs a final statement)
    d) DRad (if approved today), can run with the current HyCal, will
       benefit highly from upgraded HyCal.

 I hope, it is clear that in this condition the decision from the Physics
 Division and Hall B.
 If No HyCal upgrade then testing HyCal modules from cosmic rays needs
 few months of time only. If UPGRADE, then we need to start from tomorrow.
 (wait any signal from NSF).

 Hope I made myself clear on this part.

> Ashot,
> I am not going to do anything with the calorimeter. I just started looking
> for a place where we could work on it. At the location where it is sitting
> now, we cannot do any work on it
> What I am pushing for is a meeting about preparations for all the
> experiments. There are many other things to be done besides the HyCal
> repair/testing. We need to get going on this.
> -Eugene
> ________________________________
> From: gasparan at jlab.org <gasparan at jlab.org>
> Sent: Monday, July 24, 2023 17:00
> To: Eugene Pasyuk <pasyuk at jlab.org>
> Cc: Jingyi Zhou <jingyi.zhou at duke.edu>; pi0tff at jlab.org <pi0tff at jlab.org>;
> prad at jlab.org <prad at jlab.org>
> Subject: Re: [PRad] HyCal test plan this week
>   Hi Eugene,
>  As you know, Hycal is not a standard colorimeter, it is designed and
> build
>  up by several visiting groups under my direct supervision. So, it is a
>  user colorimeter belonging to University.
>  As I stated several times in our recent meetings, I am planning to visit
>  JLab to discuss the HyCal work and other PRad related other experimental
>  issues with Patrick.
>  So, before my meeting with Patrick PLEASE DO NOT move or open the HyCal
>  colorimeter.
>  Ashot
>> Hi Jingyi,
>> I went to ESB today to see HyCal. It is impossible to work on it at its
>> current location. We have to move it somewhere where we have enough
>> space
>> to open it and also put a rack with electronics and a computer nearby.
>> So,
>> we need to solve this logistical problem before starting any work on it.
>> I
>> started working on it.
>> Meanwhile, we need to define the scope of work that needs to be done and
>> how we will do that, and equipment we need, manpower...
>> We should have a dedicated meeting(s) about preparations for the
>> experiemnts. Maybe next week?
>> -Eugene
>> ________________________________
>> From: Jingyi Zhou <jingyi.zhou at duke.edu>
>> Sent: Monday, July 24, 2023 09:54
>> To: Eugene Pasyuk <pasyuk at jlab.org>
>> Cc: Chao Peng <pengc2010 at gmail.com>
>> Subject: [EXTERNAL] HyCal test plan this week
>> Hi Eugene,
>> I am at JLab and will be available anytime when there is no PAC session.
>> What can we do with the HyCal test?
>> Chao will also come to the lab later this week if we can work on the
>> test.
>> Best,
>> Jingyi
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