luminosity monitoring for primex dan dale primex collaboration meeting december 16, 2006
TRANSCRIPT
Conclusion 1: What we have nowLuminosity Error Budget
________________________________________effect error(%)Uncorrected leakage current 0.5 (1.4%/3) TAC statistics 0.2 (0.5 per T channel)Electron counting systematics 0.8 (clock versus out of time)Electron counting statistics negligibleTAC reproducibility 0.4HYCAL collimation of TAC 0.25 (worst case, no photon collimator)Beam position/collimator effect 0.2Absorption in TAC runs not yet evaluated_______________________________________________________________
1.1%
TAC Statistics
• +- 0.5% per T channel
• If we combine all 0.2%
Electron Counting Systematics
0.8% discrepancy between CLOCK and OUT-OF-TIME methods
Electron Counting Statistics
Negligible.
Effect of Beam Missteering on Tagging Ratios
Run 4338: centeredRun 4340: 5mm upRun 4341: 5.7 mm X 0.22mm YRun 4342: 8.62 X Run 4343: 6 mm X
Conclusion 2: What we can ultimately do.
Luminosity Error Budget________________________________________effect error(%)Corrected leakage current 0.3 (1.4%/3/2) TAC statistics 0.2 (0.5 per T channel)electron counting systematics 0.8 (clock versus out of time)Electron counting statistics negligibleTAC reproducibility 0.4HYCAL collimation of TAC 0.25 (worst case, no photon collimator)Beam position/collimator effect 0.2Absorption in TAC runs not yet evaluated_______________________________________________________________
1.0%