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RAON 초전도 선형 가속기에 의한 토양 및 지하수 방사화 평가
김선아(Suna Kim),강보선(Bo Sun Kang),남신우(Shinwoo Nam),정연세(Yonsei Jung),이상진(Sangjin Lee) 한국방사선학회 2014 한국방사선학회 학술대회 논문집 Vol.2014 No.추계
RAON은 대전 인근에 건설 중인 중이온빔을 이용할 수 있는 연구시설이다. RAON의 초전도 선형가속기(SCL)는 최대 400 kW의 다양한 고에너지 중이온빔을 제공하며 지하 터널에 설치된다. 선형 가속기가 설치될 지하 터널의 차폐조건을 결정하기 위하여 장기간 가동으로 인한 누설방사선의 토양과 지하수 방사화 영향을 평가하였다. SCL을 따라 1W/m의 균일한 중이온 빔 손실이 있을 때 SCL 주변에서 생성되는 즉발 중성자속 계산을 위해 PHITS를 사용하였고, PHITS로 계산된 중성자속을 MCNPX와 SP-FISPACT의 선원향으로 사용하여 터널 외부에 있는 토양과 지하수의 방사화를 평가하였다. RAON is a heavy-ion related research complex that is being constructed in the vicinity of Daejeon Korea. The superconducting linear accelerator(SCL) of RAON which is planned to be installed at underground tunnel will provide various high energy heavy-ion beams with the maximum power of 400kW. In order to determine the shielding design requirements of SCL tunnel, we evaluated the influence of leakage radiation during long-term operation in the activation of soil and ground-water. The source term calculation for prompt neutrons generated by the heavy-ion beam loss was conducted by using PHITS with the beam loss rate of 1W/m along the SCL. Successively the result was used as the input of the MCNPX and SP-FISPACT for the evaluation of the activation level of the soil and groundwater outside the SCL tunnel.
Performance of the CREAM-III Calorimeter
Moo Hyun Lee,Ho Seok Ahn,Ganel, O.,Ji Hye Han,Jeon, J.A.,Chan Ho Kim,Ki Chun Kim,Lutz, L.,Malinin, A.,GoWoon Na,Shinwoo Nam,Park, I.H.,Na Hee Park,Eun-Suk Seo,Vartanyan, A.,Walpole, P.,Jayoung Wu,Jong IEEE 2009 IEEE transactions on nuclear science Vol.56 No.3
<P>Cosmic Ray Energetics And Mass (CREAM) is a balloon-borne experiment to directly measure the elemental spectra of protons to iron nuclei with energies up to ~ 10<SUP>15</SUP> eV. Energies of these cosmic-ray particles are measured by an ionization calorimeter comprised of 20 layers of 1 radiation length thick tungsten plates and 20 layers of 0.5 mm diameter scintillating fibers. Each tungsten plate is 500 times 500 times 3.5 mm<SUP>3</SUP> and the fibers are grouped into fifty 1 cm wide ribbons. After construction, the CREAM-III calorimeter was tested at CERN, the European high energy physics lab, in the H2 beam line of the SPS. Following the CERN test, the calorimeter was integrated into the CREAM-III instrument, and flown successfully in the 3rd flight of the project, during the 2007/8 Antarctic campaign. We present the performance of the CREAM-III calorimeter in lab and beam tests.</P>
MEMS space Telescope for the observation of Extreme Lightening (MTEL)
Jae-Hyoung Park,Garik Garipov,Jin-A Jeon,Joo-Young Jin,Aera Jung,Ji-Eun Kim,Minsoo Kim,Yong-Kweon Kim,Pavel Klimov,Boris Khrenov,Chang-Hwan Lee,Jik Lee,Go-Woon Na,Jiwoo Nam,Shinwoo Nam,Il-Heung Park,Y 한국천문학회 2009 天文學會報 Vol.34 No.1