[Sane-analysis] Minutes for 11/11/09 Meeting

[narbe at jlab.org]

Jonathan: Been going through ntuples replayed by official Analyzer and
calculating raw asymmetries with raw signals (imposing 2 clusters found in
BETA). Did both with and without online polarization information and found
some interesting trends

https://hallcweb.jlab.org/experiments/sane/wiki/index.php/User:Jrmulholland

Will redo with imposing 1 cluster found in BETA.

Also, keeping inventory of processed runs with online polarization and
accumulated charge information.


Hovhannes: Wrote program to take average TE for run sub-ranges

https://hallcweb.jlab.org/experiments/sane/wiki/index.php/TE_List


James: Produced plot of (charge-averaged) online polarization per run#.

https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Online_Polarization_Run_Summary

Implemented cuts for TE calculations to select He4 manometer temperatures
that are useful for off-line TE calculations.

Fitting TE relaxation curves to select useful times.


Luwani: Looking at beam position via EPICS for HMS runs analyzed by
Hoyoung for asymmetries
http://www.jlab.org/~lzwano/epics_72446-72486.pdf

Will be looking at early runs that have no beam position information.


Hoyoung: Working on plotting HMS and BETA asymmetries together, as well as
both parallel and perpendicular data. Will have it soon.


Oscar: Looking at charge asymmetry information with Mark's recent
corrections. Will post something soon when ready.


Narbe: Looking at various plots for 5.9GeV perpendicular data with HMS
setting 3.1GeV/c 15.4degree.

https://hallcweb.jlab.org/experiments/sane/wiki/index.php/Packing_Fraction

Plots under 11/11/09 show large inefficiencies. Hovhannes reminded that
there was a time during the running when there was a large gas leak for
the HMS. This could possibly explain this.

Will make some diagnostic plots for xptar vs. yptar and xptar vs. hmsdeltaP.