[Sbs_gems] [EXTERNAL] Question on pedestal plots

[Gnanvo, Kondo (kg6cq)]

Hi Andrew,
I was looking at some pedestal plots and I noticed two things,

1-) The difference between sorting and Danning method has this curve-like shape for the U-V strip layer that is not seen for the X-Y layers and the difference is quite significant compare to the common mode fluctuation itself. I looked at some earlier plots (run 13394) when we had all 4 U-V layers as well as the most recent one and it seems quite consistent.

https://logbooks.jlab.org/files/2022/01/3975625/summaryPlots_13455_BBGEM_ped_and_commonmode_50k_printme.pdf

https://logbooks.jlab.org/files/2022/01/3974078/summaryPlots_13394_BBGEM_ped_and_commonmode_50k_printme.pdf

2-) I also see for the V stripe of layer#1, the difference is more pronounced and I am thinking this might partly explain the lower efficiency we are seeing with this layer

I was wondering if there is any explanation for the discrepancy. Maybe there is something here that we can learn something from

Best regards
Kondo
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