[Sane-analysis] Minutes of August 11 2010 Analysis Meeting

[Narbe Kalantarians]

_*Hovhannes:*_ Done (pi0-mass) calibration for a good part of the 
perpendicular runs; 72487-72820. Working on the 72400's as of now. The 
reason for the break-up into sub-groups was from looking at the pi0 mass 
initially for the entire perpendicular set, the pi0 mass shifted 
considerably to different values over time. This could possibly be due 
to differences in HV settings/gain.


_*James/Jon:*_ Started looking at the deadtime for the helicity scalers. 
This is to provide a cut for these scalers, which will be for sub-sets 
of runs.  Will prepare a table for this.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Dead_Time#First_Look_at_Dead_Time:_8.2F11.2F2010

The Syncfilter is not going to be used anymore, because it is 
incompatible with the helicity scalers. Most of the corrections are 
already being done in the analyzer.

Relating to this, Oscar suggested documenting the analyzer process with 
a flow-chart, illustrating the input files as well. Jon volunteered to 
work on this  with help from Hovhannes.


_*Anusha:*_  Started comparing data to MC for NH3 targets. The 
discrepancy for deltaP is from the radiative corrections not being 
correct. Will get the correct ones soon.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/MC_for_background 
(go to bottom of page)

Calibrating beam position variable (Ty) from EPICS. Will make a table. 
This would be necessary for the packing-fractions as well.
https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Sieve_Slit

Recalibrating HMS drift-chambers to account for the (ultra)low 
efficiency periods.


As always, please let me know if I missed anything or if I made any 
mistakes.

Next meeting will be Aug 18th at 15:30.


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