[Clas12_first_exp] CLAS12 First Experiment 03/13/19

[Andrey Kim]

Dear FX,
Do you read number of events per run from RCDB? There is a range of runs where the number of events seems to be wrong. I have included accumulated number of events to the timeline: https://clas12mon.jlab.org/rga/stats/timeline/
The runs between between 4146 and 4163 seem to have exaggerated values in RCDB and bring the ratio between IN/OUT to 62%/38%
Andrey.



On Mon, Mar 18, 2019 at 5:24 PM Francois-Xavier Girod <fxgirod at jlab.org<mailto:fxgirod at jlab.org>> wrote:
Dear Andrey, all

With the 10.6 GeV charges you show, I am getting 32% outbending and 68% inbending

This is a bit different from what I obtained counting the raw number of events (triggers)

I think the livetime was not very different but the trigger rate was
3932 spring outbending 17 kHz
4013 spring inbending 14 kHz
5036 fall inbending 13 kHz
5664 fall outbending 20 kHz

If I try to correct for this effect I get:
inbending:
(0.14*85.27 + 0.13*47.78) / (0.17*24.367 + 0.14*85.27 + 0.13*47.78  + 0.2*39.045) = 60%
outbending:
 (0.17*24.367 + 0.2*39.045) / (0.17*24.367 + 0.14*85.27 + 0.13*47.78  + 0.2*39.045) = 40%

These numbers reproduce quite closely what I obtained by counting the number of events in all the files from the pass0 selection
I am not sure which way to count is more correct. I said before that the outbending is more favorable both for DVCS and the exclusive phi so maybe I should not insist on this point, but for physics purpose we are interested in the number of events, not really the Fcup charge directly.

Best regards
FX

On Mon, Mar 18, 2019 at 9:44 PM Andrey Kim <kenjo at jlab.org<mailto:kenjo at jlab.org>> wrote:
I split different energies apart: https://clas12mon.jlab.org/rga/stats/timeline/
spring inbeding 6GeV: 0.819 mC
spring outbeding 6GeV: 1.68 mC
spring outbeding 10GeV: 24.367 mC
spring inbeding 10GeV: 85.27 mC
fall inbeding 10GeV: 47.78 mC
fall outbeding 10GeV: 39.045 mC



On Mon, Mar 18, 2019 at 2:23 PM Andrey Kim <kenjo at jlab.org<mailto:kenjo at jlab.org>> wrote:
It's integrated over all energies. But it makes sense to separate them I'll do it now.
Andrey.

On Mon, Mar 18, 2019 at 11:47 AM Eugene Pasyuk <pasyuk at jlab.org<mailto:pasyuk at jlab.org>> wrote:
Andrey,

Is it for 10.6 GeV only or includes low energies as well?

-Eugene


From: Clas12_first_exp <clas12_first_exp-bounces at jlab.org<mailto:clas12_first_exp-bounces at jlab.org>> On Behalf Of Andrey Kim
Sent: Monday, March 18, 2019 11:23 AM
To: Latifa Elouadrhiri <latifa at jlab.org<mailto:latifa at jlab.org>>
Cc: clas12_first_exp at jlab.org<mailto:clas12_first_exp at jlab.org>
Subject: Re: [Clas12_first_exp] CLAS12 First Experiment 03/13/19

Following last week discussion, I have calculated accumulated charge for inbending and outbending data for RG-A using IPM2C21A: https://clas12mon.jlab.org/dev/rga/stats/timeline/
We collected:
86.090 mC during spring inbending
26.047 mC during spring outbending
47.780 mC during fall inbeding
39.045 mC during fall outbending

I used start/end times from RCDB. I remember we had some issues with RCDB at some point when not all runs were stored there. Did it happen during RGA data taking or RGK?
Best,
Andrey.


On Mon, Mar 11, 2019 at 6:26 AM Latifa Elouadrhiri <latifa at jlab.org<mailto:latifa at jlab.org>> wrote:

Dear all,

We will have our CLAS12 First Experiment meeting Wednesday March 13, 2019 at 8:30 in F224/25

The agenda of the meeting includes:

RGA Spring 2019:

  *   Run Plan/Shifts/Run coordinator list
  *   Plans for online calibration/data processing

RGA_Fall/Spring 2019

  *   Status of data processing/disk space organization
  *   Status of Alignment and plan for next steps of data calibration
  *   Timeline Monitoring status
  *   First look at the processed data
  *   Others

Please let me know by this evening if you have any questions and if you would like to give a presentation



Best regards,

Latifa




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