FMS Small Cells Trigger Rate Overview

The following plots are intended to illustrate the trigger rate variation as a function of run number (sample from day 123 to day 164) and of the azimuthal angle phi for different pseudo-rapidity ranges.

The quantity being plotted below is defined as, (for each Eta bin)

f = (Number of triggers in Phi bin) / (Total number of triggers) * (Total number of channels) / (Total number of channels in Phi bin)

In essence, it's trigger rate normalized to the total number of triggers, and the number of cells in each Phi bin. The latter varies in phi primarily because of the geometry. 

If the trigger rate is perfectly uniform, then to the extent that the eta bins are small enough, all bins should have 1, showing green vertical lines independent of phi for each run. In reality the Eta binning is not quite that small, but at the level at which we are currently seeing the trigger rate variations, these should be useful plots.

Links to the runs by run index (Some runs are not posted)

0. Run 10123004 (5/3)

1. Run 10124075 (5/4)

2. Run 10125010 (5/5)

3. Run 10128066 (5/8)

4. Run 10129029 (5/9)

5. Run 10131009 (5/11)

6. Run 10132011 (5/12)

7. Run 10134027 (5/14)

8. Run 10135070 (5/15)

9. Run 10136070 (5/16)

10. Run 10138049 (5/18)

11. Run 10139017 (5/19)

12. Run 10140010 (5/20)

13. Run 10142043 (5/22)

14. Run 10143083 (5/23) -> Steve's Pi0 reconstruction analysis

15. Run 10145087 (5/25)

16. Run 10146091 (5/26)

17. Run 10148033 (5/28)

18. Run 10149035 (5/29)

19. Run 10151005 (5/31)

20. Run 10152001 (6/01)

21. Run 10154066 (6/03)

22. Run 10156038 (6/05) -> Steve's Pi0 reconsturction analysis

23. Run 10158076 (6/07)

24. Run 10161026 (6/10)

25. Run 10163008 (6/12)

26. Run 10164060 (6/13)->Steve's Pi0 reconstruction analysis

27. Run 10166026 (6/15)

28. Run 10167009 (6/16)

Other Links

Small Cell HV change Recommendations (5/16)

A note on FMS HV system (5/27)