[Primexd] [Revised Logentry] CCAL occupancy plots

[Gan, Liping]

HI, all,

The outer edge of Compton distributions on CCAL should be defined by the exist window of FCAL pipe. I agree with Justin that it seems some misalignment between FCAL and CCAL.

Liping

From: Justin Stevens <jrsteven at jlab.org>
Sent: Thursday, February 28, 2019 12:53 PM
To: Gan, Liping <ganl at uncw.edu>
Cc: primexd at jlab.org
Subject: Re: [Primexd] [Revised Logentry] CCAL occupancy plots

Hi All,

Please see my comment to Drew’s log entry https://logbooks.jlab.org/comment/20469#comment-20469<https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flogbooks.jlab.org%2Fcomment%2F20469%23comment-20469&data=02%7C01%7Cprimexd%40jlab.org%7C0c5c4811147746a608b708d69dba9c39%7Cb4d7ee1f4fb34f0690372b5b522042ab%7C1%7C0%7C636869822152138936&sdata=%2F1hG9SISQpX%2BVkz%2BNVKV13OEG%2F%2BrGBw0E34aV4dHX7w%3D&reserved=0>, crudely comparing Liping’s simulated distribution to the monitoring plots from data.  Unless I’m missing something (which is certainly possible), this looks more like a shift in the acceptance region than an unexpected hole.  Please correct me if there’s some reason I should be comparing these two distributions directly.

Following up on my earlier suggestion, this would be much easier to compare if we had some simulated event samples that could be run through the same reconstruction path as the data…

-Justin


On Feb 28, 2019, at 11:10 AM, Justin Stevens <jrsteven at jlab.org<mailto:jrsteven at jlab.org>> wrote:

Hi Liping,

Thanks for the plots.  Just to be clear, are these simulated distributions with the CompCal in it’s current (as-built) position and all upstream material included?

Also, do we have this compton event generator in the Hall D simulation framework where we can simulate these events compton events and run them through our full simulation: hdgeant(4), mcsmear, reconstruction, etc.?  It would be really useful to have some MC samples to compare with the compton data samples being collected now.

-Justin


On Feb 27, 2019, at 11:27 PM, Gan, Liping <ganl at uncw.edu<mailto:ganl at uncw.edu>> wrote:

Hi, all,

Attached file is simulated Compton event distributions on CCAL.

Liping

________________________________
From: Primexd <primexd-bounces at jlab.org<mailto:primexd-bounces at jlab.org>> on behalf of Ilya Larin <ilarin at jlab.org<mailto:ilarin at jlab.org>>
Sent: Wednesday, February 27, 2019 10:54 PM
To: gasparan at jlab.org<mailto:gasparan at jlab.org>; Alexander Somov
Cc: primexd at jlab.org<mailto:primexd at jlab.org>
Subject: Re: [Primexd] [Revised Logentry] CCAL occupancy plots


  One of the possible options is exactly what we had in Primex-1 in 2004
with the missing HyCal square: Low energy hits occupancy looks uniform,
while high energy ones show missing column, as it would be no info going
to the trigger sum. But my assumption can be wrong: still investigating.

 Ilya

________________________________
От: Primexd <primexd-bounces at jlab.org<mailto:primexd-bounces at jlab.org>> от имени gasparan at jlab.org<mailto:gasparan at jlab.org> <gasparan at jlab.org<mailto:gasparan at jlab.org>>
Отправлено: 27 февраля 2019 г. 21:58
Кому: Alexander Somov
Копия: primexd at jlab.org<mailto:primexd at jlab.org>
Тема: Re: [Primexd] [Revised Logentry] CCAL occupancy plots


  Looks not bad!, so what was wrong in Drew's plots?

 Ashot


>
> Logentry Text:
> --
> Just to follow up our discussions about Compton reconstruction and
> performance of the CCAL
>
> Below are some occupancy plots for triggered events (trigger bit 1)
>
> Fig. 1 Run 61321 (first Compton production run) 02/26, 1 am
> Fig. 2 Run 61331 (middle of production) 02/27, 1 am
> Fig. 3 Run 61340 (run recently taken) 02/27, 20 pm
>
> CCAL Occupancy from DigiHits       (top left)
> Energy weighted occupancy from DigiHit   (top right)
>
> The same for Hit factory        (middle plots)
> (calibration applied)
>
> FADC time in the readout window for all CCAL channels  (bottom plot)
>
> The occupancies are relatively uniform (except for a few cells, minor
> effect)
>
>
>
>
>
>
> ---
>
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