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Effects of Damage Caused by Non-ionizing Energy Loss in Si Mini-Pad Sensors for the PHENIX MPC-EX
채종서,미트라게게르치,한인식,S. Y. Han,I. W. Jeong,주관식,김은주,S. G. Kim,김용균,E. Kistenev,권영일,J. G. Lajoie,Z. Li,J. H. Lee,K. S. Lim,S. H. Lim,J. M. Park,K. S. Park,S. Y. Park,H. S. Song,D. G. Sue,A. Sukhanov 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.11
The PHENIX MPC-EX is an W/Si pre-shower detector operating at small angles with respectto the beam in the Relativistic Heavy Ion Collider (RHIC). The Si Mini-Pad sensors are the activeelement of the detector. The expected hadron flux to the Si Mini-Pad sensors will generate significantnon-ionizing energy loss in the sensors, which may damage the crystalline structure of thesensor’s bulk material. We investigated the nature of the hadron flux to the Si Mini-Pad sensorsthrough a full simulation and determined its effect on the sensor’s characteristics based on a beamtest. The investigation showed key issues in designing a preshower detector using silicon sensorsand operating under a large neutron fluence and offered valuable information on the operation ofthe MPC-EX detector.
채종서,미트라게게르치,한인식,S. Y. Han,I. W. Jeong,주관식,김은주,김용균,E. Kistenev,권영일,J. G. Lajoie,Z. Li,J.H.Lee,K. S. Lim,J. M. Park,K. S. Park,H. S. Song,D. G. Sue,A. Sukhanov 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.65 No.1
The Si Mini-Pad sensor is an essential component of the MPC-EX preshower detector. Thisdetector will be integrated into the PHENIX experiment at Brookhaven National Laboratory’s RelativisticHeavy Ion Collider. We describe the development of the surface pattern and the fabricationprocess of the Si Mini-Pad sensor and present a test by the low energyirradiation that is sensitiveto the surface design.