I did a scan over all runs in my runlist to check the BEMC status tables over time.

According to the BEMC Db browser, there are a total of 278 possible status tables for BTOW and 87 for BSMD for thetime period from April 29 to June 24, 2005 that covers the above runlist. After scanning the runs, I found there are 83 and 64 distinct status tables for BTOW and BSMD, respectively.

For this study, I grabbed the status for every channel in BTOW, BSMDE, and BSMDP in a single event of every run in the list. The code can be found at RCF: /star/u/kurnadi/code/2005/data/ScanStatus.C.

The macro produces a *status.root file for every run, that contains (for every sub-detector):

• A visual of the detector status in eta (-1, 1) vs phi (-pi,pi)
• Status as a function of channel id
• Number of good channels for every module
• Fraction of good channel (here called acceptance) as a function of module, and over entire detector

With the above available for every run, I used another macro (RCF: /star/institutions/ucla/kurnadi/ppy05/ReadCompareStatus.C) to:

• Determine the number of distinct status table for every sub-detector
• Identify which status table (identified by table index) is active for each run
• Check every detector's acceptance as a function of time (indirectly by using run index)
• Plot the distribution of number of runs using a given table
• Plot the distribution of detector acceptance

Example of detector status visual (run 6120039):

X axis always goes from eta = -1 to eta = +1 (left to right)

Y axis always goes from phi = -pi to phi = +pi (bottom to top)

Example of BEMC status by module (run 6120039):

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Over all runs, the distribution of acceptance (counting west barrel as full detector) is as shown below:

BTOW overall has higher acceptance than the BSMD, and BSMDP has slightly higher better acceptance than BSMDE. From the distribution, we can see that there's a number of runs where about half the BSMD is bad. Looking at the acceptance over time (table index) below shows that those runs are at the end of the run list, namely ones using the last two status tables. There are 30 runs using the last two status tables (BTOW #82,84 and BSMDE/P #63,64), starting with run 6174010.

In general, no single status table dominates over this time period. There's a number of BTOW and BSMD status tables that are effective for 25 or greater runs, but those still don't make up for a majority of the runs.