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SCBF 장치에서 그리드 음극 구조의 영향에 대한 입자 시뮬레이션
주흥진,박정호,고광철,Ju, Heung-Jin,Park, Jeong-Ho,Ko, Kwang-Cheol 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.8
In 2-dimensional SCBF (Spherically Convergent Beam Fusion) device, the effect on neutron production rate of the grid cathode geometry was simulated. The motion of Particles was tracked using Monte Carlo Method including the atomic and molecular collision processes and potential distribution was calculated by Finite Element Method, Main processes of the discharge were the ionization of $D_2$ by fast $D_2^+\;ion$. As the number of cathode rings was small and the size of grid cathode decreased, the ion current increased and neutron production rate will also increase. The star mode discharge which is a very important characteristic in SCBF device, was confirmed by the ionization position.
유전체 장벽 방전을 이용한 오존 발생기의 전원장치 최적 설계 및 비교
김봉석,신영철,고광철,Kim, Bong-Seong,Shin, Young-Chul,Ko, Kwang-Cheol 한국전기전자재료학회 2011 전기전자재료학회논문지 Vol.24 No.1
Dielectric Barrier Discharge (DBD) reactor with sinsodual AC type of power supply is very widely adopted for its compact size and effective discharging mechanism to generate high density of ozone radicals. However, at the aspect of design on power supply, its optimal switching conditions and topology is achieved by empirical test. Therefore, throughout this paper, it is proposed a design method of DBD power supply to guarantee a maximum ozone yield rate in accordance with DBD reactor modification and impedance variation when rapid gas discharging in the DBD reactor is proceeded.
가스절연 개폐장치에서 유전율 구배를 갖는 고체 절연물의 형상 최적화
주흥진,김동규,고광철,Ju, Heugn-Jin,Kim, Dong-Kyue,Ko, Kwang-Cheol 한국전기전자재료학회 2012 전기전자재료학회논문지 Vol.25 No.6
A functionally graded material (FGM) spacer, which the distribution of dielectric permittivity inside an insulator changes spatially, can considerably reduce the electric field concentration around a high-voltage electrode and along the gas-insulator interface when compared to a conventional spacer with a uniform permittivity distribution. In this research, we propose the FGM spacer with an elliptical permittivity distribution instead of that with a distribution of dielectric permittivity varying along a radial direction only in order to improve efficiently the insulation capability. The optimal design of the elliptical FGM spacer configuration is performed by using the response surface methodology (RSM) combined with the steepest descent method (SDM).
SCBF 장치에서 이온전류에 대한 포텐셜 우물 구조의 영향
주흥진,박정호,고광철,Ju, Heung-Jin,Park, Jeong-Ho,Ko, Kwang-Cheol 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.5
SCBF(Spherically Convergent Beam Fusion) device has been studied as a neutron source. Neutron production rate is a most important factor for the application of SCBF device and is proportional to the square of the ion current[1]. It is regarded generally that some correlations between the potential well structure and the ion current exist. In this paper, the ion current and potential distribution were calculated in a variety of grid cathode geometries using FEM-FCT method. Single potential well structure was certified inside the grid cathode. The deeper the potential well became, the higher the ion current due to the high electric field near the grid cathode became.