Aug. 14, 2014

IST sensor efficiency
(empty sensors are excluded, bad ones are not rejected)

Excluded ladder 7-14 without hit information.
Efficiency definition: Number of IST associated hits/Number of PXL track projections

Residual & fNhit cuts has been varied to estimate systemically an error range:

Ist total efficiency  = 80.74%+-0.65%+-3.43%

QA stuff
 

  

Ladder IST projections : PXL projections in IST ladders 

Apr. 01, 2014 

Offline production of zero field cosmic ray data taken from day 38-40 (done by Xin). See linked directory below :

/star/u/dongx/lbl/hft/Run14/Cosmic_Data/

PXL Sensor efficiency in Day 39

Aug. 06, 2014 

Offline production of zero field cosmic ray data taken from day 187-188 (done by Mustafa). See linked directory below :

/star/institutions/lbl_prod/mustafa/zf/production/

PXL Sensor efficiency in Day 187

PXL efficiency versus day number (Run14)
Day 97/117 data points are from FullField cosmic-ray data with low statistics.

Day 39    PXL total efficiency  97.2% +-0.5%
Day 97    PXL total efficiency  93.8% +-1.2%
Day 117  PXL total efficiency  96.5% +-0.9%
Day 187  PXL total efficiency  90.8% +-0.4%

QA-Plots : Day 187 ZF data
(By Requiring three pixel hits in straight line tracking and looking at the relative residual of a fourth one)

Bad Sensor removed according to PXLQA plots
http://portal.nersc.gov/project/star/sss/PXL_QA_2014/