[Rgc] [EXTERNAL] Re: [clas_members] [New Comment] All online monitoring histograms for run number 16134

Sun Jun 19 15:58:48 EDT 2022

Hi All,

The DC sector-dependence is not the only anomaly. Nathan noticed that, since yesterday, the helicity-related histograms show an abnormal population of the different states.

I ran mon12 on a file from the same run 16134 and all these anomalies go away (see below). It seems there is something awkward going on with the ET ring. 

When beam is back, can we stop all other applications reading from ET ring (rastermon), run mon12 only, and see if that makes a difference?

Raffaella

> On 19 Jun 2022, at 15:14, Florian Hauenstein <hauenst at jlab.org> wrote:
> 
> I agree with Mac. 
> DC occupancies do not look right, way too much sector dependence. 
> This was not the case yesterday during DC HV scan (run 16107 https://logbooks.jlab.org/entry/4004436 <https://logbooks.jlab.org/entry/4004436> ) or in the evening 16122 (https://logbooks.jlab.org/entry/4004411 <https://logbooks.jlab.org/entry/4004411>). 16123/4 are random trigger runs.
> Issue seems also be present in the monitoring histograms from the night 16125 (https://logbooks.jlab.org/entry/4004551 <https://logbooks.jlab.org/entry/4004551>)  and 16128 (https://logbooks.jlab.org/entry/4004578 <https://logbooks.jlab.org/entry/4004578>)
> 
> Beam was shifted at 2H01 from (-0.6,0.3) https://logbooks.jlab.org/entry/4004552 <https://logbooks.jlab.org/entry/4004552>  to (-1.4,0.6) https://logbooks.jlab.org/entry/4004618 <https://logbooks.jlab.org/entry/4004618> during the night. However, run 16125 seems to have the old position  so not sure if this shift causes it.
> Otherwise beam also had instabilities and bleedthrough from Hall C throughout the night due to position drifts (https://logbooks.jlab.org/entry/4004654 <https://logbooks.jlab.org/entry/4004654>). Could this be the cause? 
> 
> In any case, we need to check histograms carefully after beam is back. If it is still present we need to investigate. 
> 
> Best,
> Florian
> 
> Von: Mac Mestayer <mestayer at jlab.org <mailto:mestayer at jlab.org>>
> Gesendet: Sonntag, 19. Juni 2022 14:14
> An: biselli at jlab.org <mailto:biselli at jlab.org> <biselli at jlab.org <mailto:biselli at jlab.org>>; clasrun at jlab.org <mailto:clasrun at jlab.org> <clasrun at jlab.org <mailto:clasrun at jlab.org>>; clas_members at jlab.org <mailto:clas_members at jlab.org><clas_members at jlab.org <mailto:clas_members at jlab.org>>; rgc at jlab.org <mailto:rgc at jlab.org> <rgc at jlab.org <mailto:rgc at jlab.org>>; Florian Hauenstein <hauenst at jlab.org <mailto:hauenst at jlab.org>>
> Betreff: Re: [clas_members] [New Comment] All online monitoring histograms for run number 16134
>  
> The DC plots look normal except for two things:
> the hole in sector 3, superlayer 6 which is new since the last run period but cannot be fixed without a long access, and
> the very strong sector dependence, with sector 1 having much higher rates than the other sectors.  I don't think this is a DC issue but is probably a beam or trigger issue.
> Florian, could you also take a look?
> Mac
> From: clas_members <clas_members-bounces at jlab.org <mailto:clas_members-bounces at jlab.org>> on behalf of biselli at jlab.org <mailto:biselli at jlab.org> <biselli at jlab.org <mailto:biselli at jlab.org>>
> Sent: Sunday, June 19, 2022 12:20 PM
> To: clasrun at jlab.org <mailto:clasrun at jlab.org> <clasrun at jlab.org <mailto:clasrun at jlab.org>>; clas_members at jlab.org <mailto:clas_members at jlab.org> <clas_members at jlab.org <mailto:clas_members at jlab.org>>; rgc at jlab.org <mailto:rgc at jlab.org><rgc at jlab.org <mailto:rgc at jlab.org>>
> Subject: [clas_members] [New Comment] All online monitoring histograms for run number 16134
>  
> All online monitoring histograms for run number 16134 <https://logbooks.jlab.org/entry/4004625>
> Edit <https://logbooks.jlab.org/entry/4004625/edit?destination=email/send>
> Delete <https://logbooks.jlab.org/entry/4004625/delete?destination=email/send>
> Lognumber 4004625 <https://logbooks.jlab.org/entry/4004625>. Submitted by clasrun <https://logbooks.jlab.org/user/clasrun> on Sun, 06/19/2022 - 06:06 <https://logbooks.jlab.org/entries?start_date=1655629594&end_date=1655636794&book=HBLOG>.
> Last updated on Sun, 06/19/2022 - 06:06
> There is 1 comment... <applewebdata://E8415A7B-E3C6-4DE3-846E-471D5D900CCB>
>  <>New reference? <https://logbooks.jlab.org/comment/38508#comment-38508>new
> by biselli <https://logbooks.jlab.org/user/biselli> on Sun, 06/19/2022 - 12:15
> Can all the detector experts take a look at these monitoring histograms and comment if we can use this run as a reference from now on?
> Logbooks:	HBLOG <https://logbooks.jlab.org/book/hblog>
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