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

[Gregory Matousek]

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)

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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