프로토 타입 조직등가비례계수기의 중입자가속기연구소의 135 MeV/u 탄소 이온에 대한 선형에너지 스펙트럼 측정
Measurement of Linear Energy Spectra for 135 MeV/u Carbon Beams in HIMAC Using Prototype TEPC
3
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
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.
Abstract
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.
참고문헌 (13)
- T. Sakaguchi, "LET distribution measurement with a new real-time radiation monitoring device-III onboard the space shuttle STS-84", Nucl. Instr. Meth., A 437, pp.75~87 (1999)
- J. E. Keith, "Neutron spectrum and dose-equivalent in shuttle flights during solar maximum", Nucl. Tracks Radiat. Mes., 20, pp.41~47 (1992)
- Operational Radiation Safety Program for Astronauts in Low-Earth Orbit: A Basic Frame Work, , NCRP, ~, pp.Report No. 142 (2002)
- European Communities, "Cosmic radiation exposure of aircraft crew", Rad. Prot., 140 (2004)
- H. H. Rossi, "A device for the measurement of dose as a function of specific ionisation", Radiology, 64 (1955)
- P. Beck, "TEPC reference measurements at aircraft altitudes during a solar storm", Adv. in Space Res., 36, pp.1627~1633 (2005)
- D. Zhou, "Radiation measured with TEPC and CR-39 PNTDs in low earth orbit", Adv. in Space Res., 40, pp.1571~1574 (2007)
- 남욱원, "Development and Characterization of Tissue Equivalent Proportional Counter for Radiation Monitoring in International Space Station", Journal of Astronomy and Space Sciences, 30(2), pp.107~112 (2013), 한국우주과학회
- Electrical Grounding Architecture for Unmanned SpaceCcraft, , NASA, ~, pp.HDBK-4001 (1998)
- D. J. Thomas, "W value measurements for protons in tissue-equivalent gas and its constituent gases", Phys. Med. Biol., 30, pp.1201~1213 (1985)
- S. Tsuda, "Measurement of microdosimetric spectra with a wall-less tissueequivalent proportional counter for a 290 MeV", u 12C beam, 2010, pp.55, 5089~5101
- Microdosimetry, "ICRU", ICRU, ~, pp.ICRU report 36 (1983)