Gas Cherenkov Detector Calibration Correction for Small Angle GDH Experiment in Hall-A

LV Hai-Jiang; YAN Xin-Hu; YE Yun-Xiu; JIANG Yi; ZHANG Pei; YE Qiu-Jian

Chinese Physics C> 2007, Vol. 31> Issue(5) : 492-495

Gas Cherenkov Detector Calibration Correction for Small Angle GDH Experiment in Hall-A

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China2 Department of Physics, Huangshan University, Huangshan, Anhui 245021, China

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Abstract：
Due to the change of the hardware and high voltage during the small angle GDH experiment data-takeing, the CO₂ gas threshold Cherenkov detector on HRS at Hall-A in Jefferson Jlab(JLab) was calibrated for seven times. The ADC signals of the single photo-electron peak for all ten PMTs were scaled to two hundred. The electrons could be separated from π by the detector after the calibration correction.

References

[1]	. Cherenkov P A. Phys. Rev., 1937, 52: 3782. Fermi E. Phys. Rev., 1940, 57: 4583. JLab Collaboration(Alcorn J et al.). NIM, 2004, A522: 2944. Gerasimov S. Yaz., 1965, 2: 598; Drell S D, Hearn A C.Phys. Rev. Lett., 1966, 16: 9085. Iodice M. NIM, 1998, A411: 223

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LV Hai-Jiang, YAN Xin-Hu, YE Yun-Xiu, JIANG Yi, ZHANG Pei and YE Qiu-Jian. Gas Cherenkov Detector Calibration Correction for Small Angle GDH Experiment in Hall-A[J]. Chinese Physics C, 2007, 31(5): 492-495.

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Received: 2006-10-16
Revised: 2006-11-21

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