1. TRD occupancy monitor status report from 29.01.2013 N.Nikonov

2. Problem’s signatures 3 types of signatures: – Gap in tracked hits distribution along the bad straw (Shape in bad straw is different from shape of others ) – Number of tracked hits in bad straw is less than average of hits number in module (Shape in bad straw is the same)

3. Problem’s signatures 3 types of signatures: – Number of missed hits in bad straw is much bigger than in others for a given module 3

4. Outline For now it’s known 9 bad staws: 324, 1438, 1439, 2145, 2575, 3296, 3297, 4800, 4831 The task is: develop online procedure to identify new BAD straws – First 2 signatures can be found use K-S tests of longitudinal straw hits distribution, compare to the Longitudinal straw hits distribution for the rest of this module Longitudinal straw hits distribution of the same straw in the beginning of the flight – The third signature requires alignment correction (disp ~ 1mm). The last data point for various allingments: – TrdKCalib 14 Dec 2012 – TrdSCalib 17 May 2012 – TrdQt 9 Sep 2012 – TrdMTrack 9 Sep 2012 No alignment available for ONLINE checks

5. Event selection rate* for 1-min ROOT-files * Evaluated use time of data acquisition (not live time). The goal is to estimate real time required to accumulate reasonable statistics per tube Straw ID Rate [events/(straw * hour)]

6. Event selection rate* for 1-min ROOT-files Spatial distribution && bad straws * Evaluated use time of data acquisition (not live time). The goal is to estimate real time required to accumulate reasonable statistics per tube Straw position X/Y TRD Layer

7. Kolmogorov-Smirnov tests results Straw vs. 15 straws average hits profile comparison Only shape TRD Layer Straw position X/Y

8. Kolmogorov-Smirnov tests results Straw vs. 15 straws average hits profile comparison Only shape Straws number K-S probability

9. Kolmogorov-Smirnov tests results Straw vs. 15 straws average hits profile comparison Shape + normalization TRD Layer Straw position X/Y

10. Kolmogorov-Smirnov tests results Straw vs. 15 straws average hits profile comparison Shape + normalization Straws number K-S probability