Difference between revisions of "G2p Analysis Minutes"

Revision as of 21:35, 20 June 2012

Minutes of the weekly analysis meetings

6/20/2012: Present: Jixie, Min, Pengjia, Melissa, Jie, Alex, JP, Chao, Toby, Kalyan, Ryan, Vince By-Phone: Karl

Feature Presentation:
1) Toby: Target_analysis_update)
TE analysis is done for one point, details is shown in the above link, 39 points to go

2) Chao: Updating db_run.dat, see details here. A) Reported that 'end of run time' can be accessed with 3 methods, some methods do not work.
Vince suggested to also look into event type 100 in the raw data file.
B) Averaged epics variables in a run by run manner
C) HALLA:p is missing in the raw data. It sometimes even disappeared in the epics files. Pengjia will look
into this.
D) Removed helicity decoder from replay. Will do the helicity replay separately and store the result
into a table. This table will be inserted into the output ntuple each time the replay is running.

Status Update:

• Jie:

1) doing an independent check of the Cherenkov calibration. Working on A)the pedestal for each PMT
and B)Align single photo-electron peak for each PMT.

• Ryan:

1) Average the epics variable in a run. Can cross check with Chao's result
2) Sign a flag to each run based on all information(from student log, shift workers' log,etc...)

• Melissa:

1) Checking the consistency of the Cherenkov calibration.

• Min:

1) Checked materials and thickness that an incoming electron and an outgoing electron will go through,
reports posted in the elog entry 172
2) Put the survey information into the program and optimize straight through optics

• Pengjia:

1) Split the halog by author such that it will be convenient for searching. New halog is posted here.
2) Will check the epics for missing variable issue.
3) Working on BPM calibration.

• Jixie:

1) Organized the survey web. Talked with Jim for the right HRS survey which is done before the
experiment. The report for the HRS survey done after experiment is ready. Sieve and local dump survey
was done this Monday and the report are in progress.

6/12/2012: Present: Jixie, Min, Pengjia, Melissa, Jie, Alex, JP, Chao, Toby, Ryan, Vince, Kalyan By-Phone:

Feature Presentation:
1) Min: analysis database (run information table)
Beam energy, start time, P0, Theta0 for each run have been written into the table
107 runs are still missing. Chao will take care of these runs.

2) Jie: Finished VDC T0 calibration.

Status Update:

• Ryan:

1) Updated target_encoder, HWP status, prescale factors in the mysql database. See details here.

• Pengjia:

1) BPM: obtained noise for every gain setting
2) BCM: Gain is unstable before March 10. Need absolute uncertainty of calibration. Alex will look into it.

• Toby:

1) Picking out good TE measurements. Match TE points to the right material. Will do new fits.
2) Updated target log book on the wiki.

• Chao:

1) Improved helicity decoder
2) Will prepare run information table for further analysis

• Melissa:

1) Working on Cherencov calibration

5/30/2012: Present: Jixie, Min, Pengjia, Melissa, Jie, Xiaochao, JP, Chao, Toby, Melissa By-Phone: Karl, Guy

General discussion (JP, Karl, ...):
1) Chiral Dynamics Workshop will be held at Jlab in Aug 6-10. The deadline for submission is June 1.
Please submit abstract.
2) Gorden conference will take place at the same time. Submit abstract before deadline!
3) G2P group will give 3 talks for the Hall-A collaboration meeting .
We will meet next Wednesday 13:00-15:00 to practice the talks and giving feed-back.
Jixie has reserved L207. (Jun 6, 13:00 - 15:00).
4) Karl will provide plot|slice material to Bob and Jixie for their talks in Hall A collaboration meeting.

Feature presentation:
1) Pengjia: Preliminary BCM calibration Result

Status Update:

• Guy:

1) Have analysis meetings in Israel. Analyzing the data.
2) Need to discuss how to do the dilution factor calculation.

• Jixie:

1) working on optics analysis.

• Min:

1) Calculating the uncertainty of pointing. Discussing with Nilanga about it.

• Chao:

1) Working on helicity reconstruction. Need Pengjia to cross check this when finish.
2) will cross check BCM calibration soon.

• Toby:

1) Preparing the target material TE table for target calibration.

• Jie:

1) Working on VDC T0 calibration. Need more statistics to get the result.

• Melissa:

1) Working on CC calibration.

Minutes_Jan2012_to_Mar2012

Minutes_July2011_to_Dec_2011

Minutes_Jan2011_to_June_2011