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Effect of Gamma Irradiation on the Properties of a Multigap Resistive Plate Chamber
DongSooKim,KisangLee 한국물리학회 2003 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.42 No.6
The eect of gamma irradiation on the Multigap Resistive Plate Chamber (MRPC) of the ALICE time-of- ight detector was tested using the electron beam dump of the Pohang Linear Accelerator. We measured the current in the chamber, the single rate, and the cosmic-ray detection eciency before and after 9 hours of irradiation, which amounts to more than 10 years of the Large Hadron Collider (LHC) running. The current and the single rate were reduced after irradiation whereas the eciency did not show any signicant change.