[Clas12_calcom] [EXTERNAL] RG-D Pass0 Timelines

[Daniel Carman]

Lamiaa,

For the most part things are in decent shape carrying over the calibration constants from RG-C in November 2022
and projecting them into the RG-D run range. What is see is very much what I expected. There are some things to
note from my perspective looking at things quickly:

1) DC - residual means relative constant vs. run number but shifts up to 300 microns. sigmas are already in spec.
2) FTOF - energy calibration needs adjustment. panel-1b timing within +/-40 ps of nominal. Resolution out of spec
due to poor energy calibration (which affects time walk correction).
3) r18360-18369 - S2 problem needs investigation
4) CTOF - timing is a mess. Is this because of event selection not associated with the electron trigger?
5) EC- empty plots for r18432-18474. Why? Otherwise sampling fraction is reasonable. Timing shifted by 250 ps
before r18401.
6) HTCC - gain and timing pretty good. However, S2 is missing in a lot of the plots.
7) CND - timing within 100 ps with a slow worsening drift vs. run number.

Seems S2 is a significant problem across a sizeable fraction of the run range. We can talk about this tomorrow at
CALCOM.

Regards,
Daniel

On Oct 19, 2023, at 6:48 PM, Lamiaa El Fassi via Clas12_calcom <clas12_calcom at jlab.org<mailto:clas12_calcom at jlab.org>> wrote:

Dear Detectors/Calibration Experts,

Thanks to Nathan and Mikhail, we finally have the first RG-D Pass 0 timelines up and running; please see this link:

https://clas12mon.jlab.org/rgd/pass0.1/tlsummary/

Please check your subsystem and let us know what you think about the quality of the first online calibration of RG-D inbending and outbending runs. I believe some subsystems are in better shape than others, but I am eager to hear your opinion and make a plan for the step forward.

Best,

Lamiaa

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* Dr. Daniel S. Carman                  e-mail : carman at jlab.org<mailto:carman at jlab.org>
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