[Sane-analysis] Minutes of 11/18/09 Meeting

[Narbe Kalantarians]

_Hovhannes:_ Working on implementing neural-network to Analyzer. There 
are some details that need to be resolved, including getting the proper 
calibration constants.


_Hyoung:_ Made plots of HMS and BETA asymmetries, using Hovhannes' 
Analyzer, and corrected for target and beam polarization information. 
Only a few outlying points seen.
Not using correct charge-asymmetry calculation for HMS data (will redo).
http://www.jlab.org/~hykang/HMS_asym/tasym_all.gif
http://www.jlab.org/~hykang/HMS_asym/tasym_beta_all.gif


_Anusha:_ Comparing data and MC for coincidence data 
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/MC_COIN
Using polygon cut 
(https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Tracking_Efficiency), 
removed a considerable amount of background. Seen some offsets in y_HMS 
and deltaP from beam-position offsets.


_James:_ Working on TE decay curve. Will show next meeting.


_Jon:_ Looking at spin asymmetries from 5.9GeV parallel data.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/User:Jrmulholland

Sees slopes (asymmetry large, then decreases rapidly). Don Crabb said 
this could be from targ depolarizing quickly during that time.
Will look at SR information (ADC triggers) as well try cutting out inner 
region of SR creating region of inner(outer) diameter(s) of 1cm(2cm).


_Luwani:_ Made color plots of SR
http://www.jlab.org/~lzwano/Run_72446-72486.pdf
For some runs it appears that there is uneven distributing through SR 
area. These plots were done without any cuts (cluster energy, 
coincidence timing). Will talk with Mark to get some cuts implemented.

Looked at early runs and it appears that there was some movement of beam 
during this time.
http://www.jlab.org/~lzwano/epics23.png


**Oscar mentioned that the next Hall C Users' Meeting will be not too 
far in the future (Jan 22-23 2010). He and the rest of the 
co-spokespersons have contacted or will contact advisors to get the 
students to present then. The proposed topics are:

Jon: SANE/BETA data analysis
James: Target analysis
Hoyoung: HMS data analysis
Anusha: Elasitc data analysis
Whit: Neural network effort
Luwani: Pair-symmeteric background analysis

** There will not be a meeting next week, beign that it will around 
Thanksgiving and some will be out of town. Next meeting will be the week 
after (12/2/09).


-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://mailman.jlab.org/pipermail/sane-analysis/attachments/20091118/220755ae/attachment.html