[Clas12_calcom] [EXTERNAL] RGA Spring 2019 Pass(2)-0 timeline after all calibrations tentatively completed

[silvia at jlab.org]

Hi Timothy,
I don't agree in your analysis of the CND timelines. The time offset
(which is the most important timeline for the CND) sees all runs within
specs (aside from one, for which the histograms appear all empty).
The outliers in the edep and vdiff timeline are mainly bad fits.
Before diving blindly into more calibrations, I propose you to do the same
thing we did in RGB: run the timelines using 20 files/run. You'll see that
a lot of apparent outliers will get back into specs, as the higher
statistics helped to improve the fits. If the fits still fail but plots
look ok, we can look into the timeline code and see if there is something
wrong with the way some initial parameters are given, or things like that.
Best regards,
Silvia


> Hi all,
>
> We have produced what, in theory, could be the final qa timelines for
> pass(2)-0. Please have a detailed look at your subsystems and let me and
> CALCOM know what you think. I have some individual thoughts below, but
> some big notes: 6722 is an extremely low statistics run that basically
> looks “off” in all of the QA timelines because the histograms are
> empty. It was cooked for pass-1 but possibly we should just skip it now.
> Another big issue is run 6704 which seems to have missing information in
> sector 3, which causes issues in lots of subsystems. Additionally, the
> HTCC timelines are not currently appearing online because of a typo in the
> newest GitHub code that has been corrected. It should get fixed sometime
> in the next day or so, but I wanted to go ahead and send around the
> versions that were working since it’s almost close-of-business. When
> it’s fixed I’ll make sure the url is the same but if you happen to
> click on clas12mon and nothing at all is loading you probably caught me in
> the ~30 minute window where the change to the fixed version was
> happening.
>
> https://clas12mon.jlab.org/rga/pass2/sp19/pass0/sp19_v0.11_qa/tlsummary/
>
> RF - 6722 has extreme outlier for rftime electron FD mean cause by
> seemingly empty histogram due to low statistics. Low lumi run. Is this
> okay?
>
> LTCC - still empty histogram for run 6704 and 6722. 6722 is very low
> statistics, as said above, but 6704 is a full run?
>
> HTCC - Timelines appear not to be loading for this system. Looking into
> it.
>
> FTOF - More 6722 problems. Maybe we should just drop that run, but it was
> included in pass-1... Run 6728 has a randomly extra large sigma on p1a
> sector 6. The fit looks good. The p2 vertex t appears to be blank.
>
> FT - 6724, 6725 are both empty target runs and have double peaks in the
> pi0 mass spectrum, causing the average mass to be very low (it fit the
> first peak). Is this okay? I know we wanted to focus on the special runs
> being produced well for pass 2.
>
> Forward - 6704 is empty in sector 3 (same issue as LTCC?) for electron vz,
> but not for "negatives" (or positives?)
>
> EC - 6704 empty in sector 3. ec pip time mean is all right on the edge and
> shifted from 0. Is that okay? the ec pim is centered at 0.
>
> DC - lots of sl residual outliers but mostly due to imperfect fits that
> we've discussed at length. Fit is underestimating the peak.
>
> CTOF - a few outliers on edep but the fits look better...
>
> CND - There are still a lot of outliers and to be honest, in the places
> where the timeline shows a good result, the fits are actually really poor
> (e.g., and zdiff sigma QA has lots of extremely underestimated sigmas in
> the fits). I differ to detector expert’s opinions.
>
> Best regards,
> Timothy
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