[Clas12_calcom] [EXTERNAL] Re: RGC F22 timelines with new raster calibration

[L Smith]

H Izzy,

It is not just the several runs with 4 ns shifts.  All of the HTCC runs after run 16943 changed between pass0 1.06 and pass0 1.07 and residuals are better clustered around zero..  The ECAL timing showed no shifts at all.  

Regards,
Cole

1.07





1.06








> On Jul 8, 2024, at 12:45 PM, Izzy Illari via Clas12_calcom <clas12_calcom at jlab.org> wrote:
> 
> Dear Silvia,
> 
> I have noticed for the HTCC that there is a difference in the timing. For the previous timelines, using raster calibration constants from CCDB, HTCC timing is in spec and looks how I expected:
> <Screenshot 2024-07-08 at 12.43.03 PM.png>
> 
> However, for the new timelines for RGC F22 using an sqlite file with modified raster calibration and beam offsets constants, several runs are now out of spec for the timing:
> <Screenshot 2024-07-08 at 12.42.54 PM.png>
> 
> And I know that I did not change anything on my end for the HTCC timing for RGC F22. Are other subsystems seeing similar issues?
> 
> All the best,
> 
> Izzy
> 
> On 7/8/24 11:39 AM, silvia--- via Clas12_calcom wrote:
>> Dear CalCom,
>> we have produced new timelines for RGC F22 using an sqlite file with
>> modified raster calibration and beam offsets constants, produced using
>> Derek's displaced vertex analysis.
>> The link is: https://clas12mon.jlab.org/rgc/Fall2022/pass0v1.07/tlsummary/
>> The previous timelines, using raster calibration constants from CCDB, are
>> at this link:
>> https://clas12mon.jlab.org/rgc/Fall2022/pass0v1.06/tlsummary/
>> Could you please look at your subsystem, compare the two timelines, and
>> let us know if you see any relevant changes in the calibration quality?
>> Thanks a lot!
>> Best regards,
>> Silvia
>> 
>> 
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