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RISS 인기검색어
- 검색키워드
- 저자 : Kunihito Yamauchi (검색결과 1 건)
- 무료
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Neutron and Proton Measurements of Cylindrical Radially Convergent Beam Fusion
sonoe Oura,Akitoshi Okino,Eiki Hotta,Kunihito Yamauchi,Masato Watanabe,Morimasa Yuura,Toshiyuki Kohno 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.III
Radially convergent beam fusion (RCBF) has been studied for practical use as a portable neutron/ proton source for various applications such as landmine detection and medical positron emission tomography. However, some problems remain for practical use, and the most critical one is the insufficiency of absolute neutron/proton yields. In this study, a new RCBF device was designed and tested to obtain higher neutron/proton yields. The key features of the new device are the cylindrical electrode configuration in consideration of better electrostatic confinement of ions and extraction of protons, and an integrated ion source. From the experiments using deuterium gas, it was confirmed that the ion source works effectively. At the same discharge condition of voltage and current, the obtained neutron production rate was about one order of magnitude higher than that of the conventional spherical RCBF device. A maximum neutron production rate of 6.8 × 109 n/s was obtained at a pulsed discharge of .70 kV, 10 A. For application as a proton source, proton yield in the RCBF device should be investigated, but the RCBF device also produces X-rays and electrons. To count protons by Solid-State Detector (SSD), it is necessary to eliminate these X-rays and electrons. Therefore, a new proton-counting system that has been designed has three magnetic deflectors. The SSD position was determined by a calculation of the proton trajectory.bt
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