Calibration of the BaBar CsI(Tl) Calorimeter
After nine years of operation, the BABAR experiment at the e{sup +}e{sup -} B factory PEP-II (Standford Linear Accelerator Center) stopped data taking in April 2008. An important part of the experiment is the electromagnetic calorimeter which consists of 6580 CsI crystals doped with thallium and read out by Si-PIN photodiodes. The light yield of the CsI crystals is changing in time due to radiation exposure. In addition to the changing light yield, passive material in front of and between the crystals as well as signal thresholds during the reconstruction influence the reconstructed energies. This requires a time-dependent calibration of the calorimeter. The calibration issues are reviewed and the calibration results obtained from various data samples are presented.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1029889
- Report Number(s):
- SLAC-REPRINT-2011-095; TRN: US1105846
- Resource Relation:
- Conference: Prepared for 13th International Conference on Calorimetry in High Energy Physics (CALOR08), Pavia, Italy, 26-30 May 2008
- Country of Publication:
- United States
- Language:
- English
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