[Rga_calib] [EXTERNAL] Re: RGA-Spring2018-Timelines & next steps of calibrations

Tue Apr 20 06:07:25 EDT 2021

Dear Latifa,
For the calibration of the FTCal, we will need several runs to correct for the radiation damage and progressive drop of the charge-to-energy conversion factor. A possible list of runs is:
3191
3279
3355
3435 or 3442
3506
3712
3752
3800
3875
3925
4013
4070
4143
4211

In case “nearby” runs were requested by other detectors, we can adjust the list; the only constraint is that we need large runs (of the order of 100 M events) to have enough statistics.

For the hodoscope, some time ago Nick requested the following runs:
3324 (65nA)
3786 (10nA)
3783 (5nA)
3834 (17nA)
3852 (20nA)
4123 (150nA Empty target)
4308 (75nA)
but we were not sure if they were already processed.
Best regards,
	Raffaella

> On 16 Apr 2021, at 15:52, Latifa Elouadrhiri <latifa at jlab.org> wrote:
> 
> Dear all,
> 
> Please find below the latest timelines of RGA-Spring2018 https://clas12mon.jlab.org/rga/pass0/v2.2.36/tlsummary/ <https://clas12mon.jlab.org/rga/pass0/v2.2.36/tlsummary/>
> 
> This is after the first round of FTOF calibrations. Dan has completed the analysis of FTOF timelines and the calibrations are good see below his observations of FTOF calibrations:
> 
> ===========================
> "1) p1b is good over the full range starting at r3210 (before that is not useable for production), eliminating
> the run ranges for FT studies and RND trigger runs. All other runs have vertex times within +/-10 ps of zero.
> 
> 2) p1a is acceptable for nearly the full range with vertex times within +/-20 ps of zero. But there is one small
> run range that has a shift out to 30 ps that I would like to improve. The relevant run range is 3734-3778. I
> would ask that run 3752 be cooked for further FTOF calibrations."
> ===========================
> So we are ready for all you to review your subsystem and let us know by Tuesday what runs you will need for us to process in order to complete your subsystem calibrations.
> 
> Please let me know if you have any questions,
> 
> Best regards,
> 
> Latifa
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