[Clas12_calcom] [EXTERNAL] Latest RGA Sp19 pass(2)-0 timelines

[Hayward, Timothy]

Dear CALCOM,

The latest pass-0 timelines, sp19_v0.05_qa, for the RGA Sp19 calibrations are available at https://clas12mon.jlab.org/timelines/?rg=rga. I would appreciate if you could give us your thoughts on your subsystems as soon as possible.

Some observations,

HTCC & LTCC: both runs 6704 and 6722 seem to have bad sec3 results. We cooked the full run 6722 as an extra run for Valerio and as he said "The ADC histograms of all LTCC channels look normal for the all the files. We cannot understand why those 2 runs on the timelines appears as missing/wrong.” 6722 is a very low statistics runs so it’s possibly related to that, but 6704 isn't. Production run 6620 is also slightly out of specs for the LTCC.

FTOF: As expected, the extra two calibration points seem to have improved the spread we were seeing in the last pass-0.

CTOF: edep QA has many runs outside of the spec lines but the timing timelines look good.

EC: The expected sector 6 loss is visible but not recoverable. I wonder if the pip time mean is shiftable with a universal constant?

[cid:B2A15CD0-5CC1-4C35-9459-39E59CBEF6B9]

FT: all looks good. The runs that stand out are the low statistics 6722 and the two empty targets.

CND: this looks very messy. I think we may need to redo these with more calibration points?

There is a round-table discussion about central AI this afternoon and during the RGA meeting this morning we agreed to wait until after that to decide on possible inclusion of the central tracking AI in the 30 full runs we wish to start as soon as possible. If someone could update me on how that goes after the meeting, I’d appreciate it. I have to head to a dentist appointment now.

Best,
Timothy


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