STAR Offline QA Shift Histogram Description - Run 8

Note:  Not all reference plots may be ideal, be sure to carefully read the descriptions.

This page contains the reference histograms and descriptions for the Offline QA system for Run 8.  These pages should correspond exactly to the jobs viewed in the Offline QA Browser.  However, STAR is a dynamic experiment and the plots generated for QA will change several times throughout the run.  If this reference page seems out-of-date, or if you find a job that would make a better reference, please email the QA hypernews list here.

Other links:

Michael Daugherity for the QA Team.
December 17, 2007.

Page Index for QA Shift Plots

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    • 1. StE trigger word: Distribution of trigger word groups: 1 = minimum bias, 2 = central, 3 = other physics, 4 = pp, 5 = high BEMC tower, 7 = laser, 8 = other.

    2. StE trigger bits: Frequency of usages of 32 trigger bits.

    3. StE softmon: all charge east/west,tpc: Ratio of total charge in all reconstructed clusters in TPC east to west halves. Should be peaked at ~1 with FWHM ~ 0.5.

    4. StE softmon: all charge east/west,ftpc: Ratio of total charge in all reconstructed clusters in FTPC East to West. Should be peaked less than 1 for d+Au.

    5. FTPC West chargestep: The real chargestep corresponds to the maximum drift time in FTPC West (clusters from inner radius electrode) and is located near 170 timebins. This position will change slightly with atmospheric pressure. The hits beyond the step at timebin 170 are due to electronic noise and pileup. This step should always be visible even if it is only a "blip".

    6. FTPC East chargestep: The real chargestep corresponds to the maximum drift time in FTPC East (clusters from inner radius electrode) and is located near 170 timebins. This position will change slightly with atmospheric pressure. The hits beyond the step at timebin 170 are due to electronic noise and pileup. This step should always be visible even if it is only a "blip".

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    • 1. FTPCW+E cluster radial position: Red line is for East, Blue is for West. Vertical black line indicates where the distribution should fall off at small radii.