[Sbs_gems] [EXTERNAL] Re: Cosmic data for INFN J3

[Ezekiel Wertz]

Hi Kondo and Sean,

Thanks for the feedback. I will carefully look over the mapping file I am
using for the analysis and try to find the problem.

Zeke

On Thursday, December 9, 2021, Gnanvo, Kondo (kg6cq) <kg6cq at virginia.edu>
wrote:

> Hi Zeke,
>
> Looks like you have a 2D reconstruction problem rather than a detector
> problem.
>
> Your 1D cluster looks fine, 2D hitmap have a regular wrong pattern so it
> is a X/Y mapping problem that you have
>
>
>
> Best regards
>
> Kondo
>
>
>
> *From:* Sbs_gems <sbs_gems-bounces at jlab.org> *On Behalf Of *Ezekiel Wertz
> *Sent:* Thursday, December 9, 2021 2:45 PM
> *To:* Sbs_gems at jlab.org
> *Subject:* [Sbs_gems] [EXTERNAL] Cosmic data for INFN J3
>
>
>
> Hi GEM folks,
>
>
>
> So recently Holly and I manipulated some readout electronics for INFN J3.
> We then took cosmic data. I have attached the results. But I have also
> attached an annotated version, describing what I think is going on with all
> 3 modules. Take note in these plots that Module 0 is the bottom. Module 1
> is the middle, and module 2 is the top. Take note in the last plot which
> shows the cluster map for the entire layer that the left is the top module
> and the right is the bottom module.
>
>
>
> Any comments and questions are welcome. Throughout some of this cosmic
> data we were varying the latency and we think that a latency of 26 is ideal
> for the current Test Lab setup.
>
>
>
> cluster_1028: Taken on 11/13/2021. Layer 0 is J1, ignore that for now.
> Layer 1 is J3, we will be comparing to this. ~1M events taken. Latency is
> 20, so not the best.
>
>
>
> cluster_1092: Taken on 12/7/2021. Layer 0 is J3. ~1M events taken. Latency
> is 26, which is better. Maybe not best.
>
>
>
> I have included an annotated version describing what I think is going on.
> In reference to that annotated version the only things that don't make
> total sense to me are the regions outlined in magenta and turquoise. I
> think the region in turquoise is simply an artifact of the location of the
> scintillators. I could carefully and slightly move the GEM layers so that
> way this portion is more towards the middle and take more cosmics. If it's
> a readout problem the answer to that is less clear, as these APVs have not
> really been manipulated. Feedback from Evaristo, Nilanga, or Kondo would be
> greatly appreciated.
>
>
>
> Best,
>
> Zeke
>


-- 
Ezekiel Wertz
Graduate Assistant
Department of Physics
College of William and Mary
ewertz at email.wm.edu
Mobile: +1 (717)-269-6488
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