1. 2006 Relative Luminosity Tai Sakuma MIT 4/5/2007
Tai Sakuma
MIT
4/5/2007

2. Proposal on unfilled bunches Relative Luminosity Update
Contents
Proposal on unfilled bunches
Relative Luminosity Update
Board 11 and 12
Timebin
Timestamp on Scaler Files
4/5/2007
Tai Sakuma

3. Proposal on unfilled bunches
I would like to propose not to use any unfilled bunch for the spin analyses.
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Tai Sakuma

4. Unfilled bunches are in the abort gaps kicked bunches
bunches which are lost
before they enter RHIC
after they enter RHIC
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Tai Sakuma

5. For example, for the fill 7652, the bunch 14, 18, 23, 59, 61, 62, 64, 100 were not in the abort gaps or kicked bunches but still they were unfilled
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Tai Sakuma

6. For the fill 7909, the bunch 2 was filled at the beginning of the fill but became almost empty by the end of this fill
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Tai Sakuma

7. For the fill 7800, the bunch 20 and 60 were only halfway kicked.
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Tai Sakuma

8. For the fill 7810, the bunch 20 and 60 were not kicked at all.
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Tai Sakuma

9. Determine unfilled bunches
Input
CDEV <measuredFillPatternM>
BBC Coincidence
Method
Extract the fill pattern from each CDEV file
If the fill pattern is not unique for a fill, look at the BBC coincidence and decide if the bunch is filled
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Tai Sakuma

10. The list of the fill pattern that I propose to use for the spin analyses
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Tai Sakuma

11. Relative Luminosity Update

12. The conclusion that I think I am going to reach
The Board Number 5
6 (1st file)
6 (2nd file~) 7 8 11 12
Bit 16  
Timebin
N/A
 correct
 wrong
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Tai Sakuma

13. Hank said The board 11 and 12 were well maintained.
The board 5 and 6 were moderately maintained.
The board 7 and 8 cannot be trusted.
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Tai Sakuma

14. The total rates for run 6. If you plot this with the linear scale, you will see two curves for each fill.
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Tai Sakuma

15. These are the 2nd longitudinal runs.
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Tai Sakuma

16. Transverse
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17. 1st Longitudinal
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Tai Sakuma

18. This phenomenon is not evident for 62 GeV but exists
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19. These are 2005 runs. Some fills have two curves.
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Tai Sakuma

20. The board 11 and 12 agree with the 2nd and the subsequent to the 2nd files from the board 6
Fill 7892 (2006 2nd longitudinal)
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21. The same plot except each run has its own panel
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22. One pp production run from the same fill
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23. The rates for each bunch for this run
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Tai Sakuma

24. The timebin BBC coincidence rates for this run
without bit16
Board 5
Board 7
Board 8
The peak is between timebin 7 and 8
These two boards don’t have good vertex distribution
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Tai Sakuma

25. with bit16
with bit16
Board 5
Board 7
Board 8
Unlike 2005 runs, there are counts for the timebin 1, 2, 3, 12, 13, 14.
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Tai Sakuma

26. The difference between with and without bit 16
Board 5
Board 7
Board 8
The vertex distribution can still be seen.
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Tai Sakuma

27. This run has six scaler files from the board 6
4th file
5th file
6th file
1st file
2nd file
3rd file
without bit16
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Tai Sakuma

28. with bit16 4th file 5th file 6th file 1st file 2nd file 3rd file
Board 6
4th file
5th file
6th file
1st file
2nd file
3rd file
with bit16
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Tai Sakuma

29. Almost complete agreement from the 2nd to the 6th files
The difference
Board 6
Almost complete agreement from the 2nd to the 6th files
4th file
5th file
6th file
1st file
The 1st file has the similar situation
with the board 5.
2nd file
3rd file
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Tai Sakuma

30. The time window for the bit 16 was the timebin 4 ~ 11 in 2005
without bit16
Board 5
Board 7
Board 8
Run
Board 6
with bit16
without bit16
Board 5
Board 7
Board 8
Board 6
Board 6
with bit16
Board 5
Board 7
Board 8
the difference
the difference
4/5/2007
Tai Sakuma

31. These are transverse runs
These are transverse runs. The board 5 and 6 timebin agree with the upper curve
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Tai Sakuma

32. 2nd Longitudinal runs
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Tai Sakuma

33. 62 GeV
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Tai Sakuma

34. Timestamp is the stop time
run _5_ sca
STAR run number
Board number
timestamp
The clock was not accurate or synchronized.
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Tai Sakuma

35. Compare the timestamp with the STAR stop time
Board 8
Board 11
Board 12
Board 5
Board 6
Board 7
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Tai Sakuma

36. Around May 3rd 4/5/2007 Tai Sakuma Board 8 Board 11 Board 12 Board 5

37. Comparison of the Scaler run length and the STAR run length
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Tai Sakuma

38. Scaler boards ran more than 20% longer than STAR for these runs.
run fill bd GlbSetup seconds starsec ratio
minbiasSetup
minbiasSetup
minbiasSetup
ppProduction
ppProduction
ppProduction
ppProduction
ppProduction
ppProduction
pp2006MinBias
ppProductionTrans
pp2006MinBias
pp2006MinBias
pp2006MinBias
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Tai Sakuma

39. To Do Compute R3 Bit 16 Timebin The board 11 The board 12 The Board 5
by changing timebin to include
Timebin 7, 8
Timebin 7, 8, 9
Timebin 6, 7, 8, 9
Timebin 5, 6, 7, 8, 9, 10
Timebin 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
Timebin 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
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Tai Sakuma

40. End