Difference between revisions of "G2p Analysis Minutes"
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| Line 18: | Line 18: | ||
*Chao: | *Chao: | ||
| − | + | ** Add Rotating Coordinate System (RCS) to Focal Plane variable in the code. In the real DB, the reconstruction <br> | |
takes the variables in the RCS, not the Transport Coordinate System(TCS). With this modification, the reconstruction<br> | takes the variables in the RCS, not the Transport Coordinate System(TCS). With this modification, the reconstruction<br> | ||
| − | between simulation and real DB agree with each other better. But still have noticeable difference. | + | between simulation and real DB agree with each other better. But still have noticeable difference. |
| − | + | ** The forward transport of the snake model still have some offset to the real detected FP variables. Need to correct <br> | |
| − | the offsets. | + | the offsets. |
| − | + | ** Check first order matrix elements for both real DB and SNAKE backward model. The real DB matrix first <br> | |
order elements for <theta_tg|y_fp> and <theta_tg|phi_fp> seem too large. See details [http://hallaweb.jlab.org/experiment/g2p/collaborators/chao/20130125/Chao_WeeklyMeeting_01252013.pdf here]. <br> | order elements for <theta_tg|y_fp> and <theta_tg|phi_fp> seem too large. See details [http://hallaweb.jlab.org/experiment/g2p/collaborators/chao/20130125/Chao_WeeklyMeeting_01252013.pdf here]. <br> | ||
*Min: | *Min: | ||
| − | + | ** Had a writeup for the [http://hallaweb.jlab.org/experiment/g2p/collaborators/mhuang/01252013/uncertainty_pointing.pdf uncertainty of pointing measurement]. According to this document, to reach<br> | |
0.5% relative uncertainty of the scattering angle, the uncertainty of the energy difference between 2 peaks <br> | 0.5% relative uncertainty of the scattering angle, the uncertainty of the energy difference between 2 peaks <br> | ||
in the pointing measurement should be 45 keV. <br> | in the pointing measurement should be 45 keV. <br> | ||
| − | + | ** Present the initial pointing result [http://hallaweb.jlab.org/experiment/g2p/collaborators/mhuang/01252013/01252013.pdf].<br> | |
*Melissa: | *Melissa: | ||
| − | + | ** Worked on optimizing the cuts for good scattering electrons. She has done that to a few momentum settings. Need to <br> | |
go through all the momentum settings. See details [http://hallaweb.jlab.org/experiment/g2p/collaborators/melissac/Efficiency/Eff_01_25.pdf here].<br> | go through all the momentum settings. See details [http://hallaweb.jlab.org/experiment/g2p/collaborators/melissac/Efficiency/Eff_01_25.pdf here].<br> | ||
| − | |||
==1/15/2013== | ==1/15/2013== | ||
Revision as of 12:09, 28 January 2013
Minutes of the weekly analysis meetings
Contents
1/22/2013
Present: Jixie, Vince, Jie, Min, Kalyan, Melissa, Chao, JP, Katherine
By-Phone: Ryan, Toby, Pengjia, Karl
General discussion
Feature presentation:
- Chao:
- Add Rotating Coordinate System (RCS) to Focal Plane variable in the code. In the real DB, the reconstruction
- Add Rotating Coordinate System (RCS) to Focal Plane variable in the code. In the real DB, the reconstruction
takes the variables in the RCS, not the Transport Coordinate System(TCS). With this modification, the reconstruction
between simulation and real DB agree with each other better. But still have noticeable difference.
- The forward transport of the snake model still have some offset to the real detected FP variables. Need to correct
- The forward transport of the snake model still have some offset to the real detected FP variables. Need to correct
the offsets.
- Check first order matrix elements for both real DB and SNAKE backward model. The real DB matrix first
- Check first order matrix elements for both real DB and SNAKE backward model. The real DB matrix first
order elements for <theta_tg|y_fp> and <theta_tg|phi_fp> seem too large. See details here.
- Min:
- Had a writeup for the uncertainty of pointing measurement. According to this document, to reach
- Had a writeup for the uncertainty of pointing measurement. According to this document, to reach
0.5% relative uncertainty of the scattering angle, the uncertainty of the energy difference between 2 peaks
in the pointing measurement should be 45 keV.
- Present the initial pointing result [1].
- Present the initial pointing result [1].
- Melissa:
- Worked on optimizing the cuts for good scattering electrons. She has done that to a few momentum settings. Need to
- Worked on optimizing the cuts for good scattering electrons. She has done that to a few momentum settings. Need to
go through all the momentum settings. See details here.
1/15/2013
Present: Jixie, Vince, Jie, Min, Kalyan, Melissa, Chao, JP
By-Phone: Ryan, Toby, Pengjia, Karl
General discussion
From next week, we will have the weekly analysis meeting at 10 AM every Friday.
Feature presentation:
- Ryan:
- Presented the optics calibration for 5T longitudinal field data set, R-HRS.
- Pengjia:
- Presented the status of BPM calibration for straight through data set.
Pengjia was trying to find the time interval that the beam is not stable and treat
them separately. He is using the 1000 events and 7500 events moving RMS to determine
one whole run into several period. See details here.
- Jie:
- Took an initial look at multiple tracks at the colorimeter. Jie was suggested to add
the electron cut then repeat the analysis. See details here.
1/8/2013
Present: Jixie, Vince, Jie, Min, Melissa, Kalyan, Chao, JP, Karl
By-Phone: Ryan, Toby, Pengjia
General discussion
- APS abstract deadline is this Friday. The deadlines for GHP and INPC are also very
close. Those who want to attend these conference please prepare the abstract as early as possible.
Feature presentation:
- Min:
- Presented the Ytg optimization for R-HRS using NO target field data. See details here.
- Prepared the non-raster SNAKE backward model for Chao.
- Chao:
- Working to compare the 1st order matrix element between REAL DB and SNAKE backward matrix.
- Chao has a long term plan to make a simplified version of HRS simulation using existing modules.
- Melissa:
- Updated the result of Detector efficiency and Cut efficiency for L-HRS. See her latest result here.
Will do the R-HRS next.
- Toby:
- Working on replay script. The output ntuple is too big. Students need to discuss and determine what variables should
be kept. Jixie suggested to include the unfinished BPM reconstruction in the cooking train at this moment. To save time and
space, do not cook optics runs.
