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프로토 타입 조직등가비례계수기의 중입자가속기연구소의 135 MeV/u 탄소 이온에 대한 선형에너지 스펙트럼 측정
남욱원 ( Uk Won Nam ),이재진 ( Jae Jin Lee ),표정현 ( Jeong Hyun Pyo ),박원기 ( Won Kee Park ),문봉곤 ( Bong Kon Moon ),임창휘 ( Chang Hwy Lim2,),문명국 ( Myung Kook Moon ),하시시키다무라 ( Hisashi Kitamure ),신고고바야시 ( Shingo Kob 한국센서학회 2014 센서학회지 Vol.23 No.3
TEPC (Tissue Equivalent Proportional Counter) was usually used for high LET radiation dosimetry. We developed a prototype TEPC for micro-dosimetry in the range of 0.2~300 keV/μm. And, the simulated site diameter of the TEPC is 2 μm, of similar size to a cell nucleus. For purposes of characterization the response for high LET radiation of the TEPC has been investigated under 135MeV/u Carbon ions in HIMAC (Heavy Ion Medical Accelerator). We determined the gas multiplication factor and measured the lineal energy spectrum [yd(y)] of 135 MeV/u Carbon ions. The value of the gas multiplication factor was 315 at 700 V bias voltage. As a result of the experiment, we could more understand the performance of the TEPC for high LET (Linear Energy Transfer) radiation. And the procedure of high LET radiation dosimetry using TEPC is established.