G2p Analysis Minutes
Minutes of the weekly analysis meetings
Contents
2/08/2013
Present: Jixie, Vince, Jie, Min, Kalyan, Melissa, Chao, JP
By-Phone: Ryan, Toby, Pengjia, Elena Long
General discussion
Feature presentation:
- Melissa:
- Finalized the cut and efficiency analysis. The pi/e ratio after the optimized cut are
- Finalized the cut and efficiency analysis. The pi/e ratio after the optimized cut are
now 0.4% for both arms. See details here.
- Melissa agreed to write some note about this job.
- Melissa agreed to write some note about this job.
- Toby:
- The previous R-HRS cooking used a wrong calibration file for the preshower. Need to do a recook.
- The previous R-HRS cooking used a wrong calibration file for the preshower. Need to do a recook.
- Min:
- Working on tuning the snake to match the real data. Min tried to turn the quadrapole and
- Working on tuning the snake to match the real data. Min tried to turn the quadrapole and
dipole such that the simulated variables in FP match the real data. But this is wrong. She will
go back to the original dipole setting and try to tune septum fields.
- Chao:
A ZERO and FIRST order post processing correction have been made to the none raster snake model. The Zero order correction
can remove most of the offsets between real data and snake model. The FIRST order correction can make it event better.
This is just a machinery check to make sure the program work fine. Will present this kind of job once Min finish tuning SNAKE.
From the ZERO order correction we can see that Q1 in the snake model need some tuning.
2/01/2013
Present: Jixie, Vince, Jie, Min, Kalyan, Melissa, Chao, JP
By-Phone: Ryan, Toby, Pengjia, Karl
General discussion
Feature presentation:
- Ryan:
- Present the result of quality check:
- Present the result of quality check:
LHRS: 956 good runs (73%), 104 junks(8%), the others have some
issues which might be useful with extra treating.
R-HRS: 798 runs are good (68%) and 109 are junks(9%)
See details here.
- Pengjia:
- Improved the code which is judge whether the beam is drifting.
- Updated MUDIFI program to export c code with error transfer function, refit the BPM transport functions.
- Improved the code which is judge whether the beam is drifting.
See Pengjia's talk here.
- Jie:
- Working on the multi-track analysis. Check the status here.
- Working on the multi-track analysis. Check the status here.
1/25/2013
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.
- Checked the first order matrix elements for both real DB and SNAKE backward model. The real DB matrix first
- Checked the 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:
- Presented a writeup for the uncertainty of the pointing measurement. According to this document, to reach
- Presented a writeup for the uncertainty of the 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 PID cuts for good electrons. She has done that for a few momentum settings. Need to
- Worked on optimizing the PID cuts for good electrons. She has done that for a few momentum settings. Need to
go through all the momentum settings. See details here.
1/18/2013
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.
