1. HF Calibration coefficients (from Data and DB) Status Report Murat Ali Guler, Kadir Ocalan (METU)‏ Ferhat Ozok, Kerem Cankocak (Iowa)‏ HF meeting 29 July 2008

2. Electromagnetic Channel Hadronic Channel LED data Run 977

3. Electromagnetic Channel Hadronic Channel Source Data Gains from DBS

4. Electromagnetic Channel Hadronic Channel

5. Electromagnetic Channel Hadronic Channel  = 33,35,38,39,  =3  = 40,  =63,67  = 32,38,39,40  =3  = 40  =63,67

6. Low intensity LED Run 53000 (1350 V)‏ SPE i : the single photoelectron response C i =( * SPE i ) -1 ~ 0.28/GeV calib.cefff ~1/gain

7. Rechit occupancies from Cruzet 3 data

8. HF Rechits in Cruzet 3 data

9. Jet construction in Cruzet3

10. LED run 53000 Low RMS

11. (SPE V2 /SPE V1 )=(V2/V1)   = 5.08 Comparison of gains at different HV

12. Electromagnetic Channe l Hadronic Channel C 1100 /C 1150 Comparison of the calib Coefficients which are in DB

13. C 1100 /C 1250

14. C 1100 /C 1350

15. C 1150 /C 1250

16. C 1150 /C 1350

17. C 1250 /C 1350

18. Next step: - we need more data (Low intensity LED runs) for HFM (and also HFP)‏ - more analysis of Cruzet data -

19. Backup slides

20. Validation studies for HF Calibration Documentation of Single Photoelectron Peak measurements and source for the calibration: CMS IN 2006/037; 9'th ICATTP, World Scientiic pp 339-342 (2006); CMS IN 2006/044; CMS IN 2006/045; CMS IN 2006/138; CMS IN 2007/012 ;CMS IN 2007/018; CMS IN-2008/015; and more.. Preliminary results from - SPE vs Data Base comparison - analysis of HF LED runs using SPE gains and Data Base gains -Cosmic ray data analysis calib. coefficients in DB 1150V gain ratio PMT(1250V)/PMT(1150V) =1.5 calib.cefff ~1/gain calib.cefff ~1/gain calib. coeff(1250V) = calib.coeff(1150V) * 0.66

21. HF- hadronic channels HF+ hadronic channels HF Calibration coefficients from Data Base (GeV/fC) frontier://Frontier/CMS_COND_20X_HCAL HF- electromagnetic channels HF+ electromagnetic channels Mean ~0.22 GeV/fC RMS ~0.06 GeV/fC Mean ~0.20 GeV/fC RMS ~0.04 GeV/fC Mean ~0.35 GeV/fC RMS ~0.09 GeV/fC Mean ~0.31 GeV/fC RMS ~0.06 GeV/fC

22. Electromagnetic channels (long fibers)‏ Hadronic channels (short fibers)‏ Comparison of the calibration constants (C i ) of LED and DB gains (C_src)‏ C i = ( * SPE i ) -1 where is the mean number of generated photoelectrons/GeV and SPE i is the single photoelectron response of the ith channel (similar method as in CMS IN 2007/018)‏ ~ 0.28/GeV from analysis of 100 GeV electron data taken in 2004 test beam. HF+ Run 977 (100 K events) at low LED intensity (1350 V)‏

23. Electromagnetic channels Hadronic channels Mean = 0.92 RMS=0.12 Mean = 0.91 RMS=0.12

24. RMS ~ 0.48 GeV RMS ~ 0.75 GeV RMS ~ 0.68 GeV RMS ~ 0.43 GeV Cruzet 3 Run 51403 (CSC, DT, HCAL trigger)‏

25. HF Calibration coefficients from Data Base frontier://Frontier/CMS_COND_20X_HCAL Electromagnetic channels (long fibers)‏ Cruzet 3 run 51403 (Shift in binning !)‏ Reflections of the gains in the cosmic muon data

26. HF Calibration coefficients from Data Base frontier://Frontier/CMS_COND_20X_HCAL hadronic channels (short fibers)‏ Cruzet 3 run 51403 (Shift in binning !)‏ Reflections of the gains in the cosmic muon data