[Rgc_analysis] [EXTERNAL] Re: RGC Beam Charge Asymmetry & Scaler Bank QA

[Gregory Matousek]

One more word,

The analysis can be expanded upon by not just looking at file-by-file scaler bank observables (for example, what was the fcup accumulation for file 'n') , but entry-by-entry observables. In that case, we could ask "how does the fcup accumulation evolve within the recon file itself?". Perhaps this could help us isolate more outliers or anomalies in the data. If any one has an idea of what we could investigate, feel free to let me know.

Gregory
________________________________
From: Gregory Matousek <gregory.matousek at duke.edu>
Sent: Tuesday, September 13, 2022 6:31 PM
To: rgc_analysis at jlab.org <rgc_analysis at jlab.org>
Cc: Anselm Vossen, Ph.D. <anselm.vossen at duke.edu>
Subject: [Rgc_analysis] [EXTERNAL] RGC Beam Charge Asymmetry & Scaler Bank QA

Hello all,

>From today's RGC meeting, we were talking about putting in more effort into understanding the beam charge asymmetries from the faraday cup charge accumulation. I put together a presentation here which shows some work on just that (https://cc.jlab.org/system/files/users/gmat%40jlab.org/Presentations/Scaler%20Bank%20QA%20for%20Target%20Polarization%20%40%20RGC.pdf<https://urldefense.com/v3/__https://cc.jlab.org/system/files/users/gmat*40jlab.org/Presentations/Scaler*20Bank*20QA*20for*20Target*20Polarization*20*40*20RGC.pdf__;JSUlJSUlJSUl!!OToaGQ!poBSft7q1QE-VjblFkLfXh9HGcjN1frfU9VC6AYrvF5WWO1CO_fCjHLu0CxfWhleR5s-DA8btLudX_LpgJ-8PlunFRdZ-sWwLy3v$>)

In this presentation, I look into the HEL::scaler and RUN::scaler banks for Run 16889 and Run 16918 , the former having an apparent 0.6% BCA and the latter -0.02% BCA (slide 16 reports +0.02% but this is because FC+ is defined by beam/target spins parallel, where in fact it should just be helicity = +1, accounting for just HWP status). We can see anomalies in the scaler banks for both runs, which needs discussing.

Please feel free to ask any questions!

Gregory
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