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오병훈(B. H. Oh),인상렬(S. R. In),조용섭(Y. S. Cho),김계령(K. R. Kim),최병호(B. H. Choi) 한국진공학회(ASCT) 1999 Applied Science and Convergence Technology Vol.8 No.4(2)
KSTAR 중성빔 입시장치는 이온원 (ion source), 중성화실 (neutralizer), 휨용전자석 (bending magnet), 이온빔 덤프 (ion dump) 및 칼로리메타 (calorimeter)들로 구성되는데, 중성빔의 생성 빛 수송을 최적화할 수 있도록 진공용기는 차동 배기계 (differential pumping system)로 되어있다. 배기계통의 설계를 위해 먼저 이온원의 정격 빔 출력 (120 ㎸, 65 A, 78 MW)에 필요한 수소 도입유량, 재전리 손실을 최소화할 수 있는 진공용기내의 압력분포 및 빔라인 부품들의 빔 손실율들을 결정한 후 , 이 값들에 의해 각 용기에서 필요한 진공펌프의 배기속도들과 이온 빔의 중성화 효율을 최적화 할 수 있는 중성화실의 기체유량 등을 입자평형식 (particle balance equation)을 사용하여 계산하였다. 또한 배기계의 동특성을 해석하여 0.5초 이하의 빔인출 실험은 보조펌프인 터보 분자펌프 만에 의해 가능하도록 하는 단펄스 빔인출 시나리오를 완성하였다. The NBI (Neutral Beam Injection) System for the Korea Superconducting Tokamak Advanced Research (KSTAR) is composed of ion sources, neutralizers, bending magnets, ion dumps, and calorimeters. The vacuum chamber, in which all of the beam line components are enclosed, is composed of differential pumping system for the effective transfer of the neutral beams. The needed pumping speeds of each of the divided vacuum chamber and the optimized gas flow rate to the neutralizer were calculated with the help of the particle balance equations. The minimum gas flow rate to the ion sources for producing needed beam current (120 ㎸, 65A, 78 MW), the pressure distributions in the vacuum chamber for minimizing re-ionization loss, and the beam loss rate on the beam line components were used as the input in the calculation. Also the scenario for short pulse operation was determined by analysing the time dependent equations. It showed that beam extraction during less than 0.5 see could be made only with TMP.
장대식(D.S. Chang),오병훈(B.H. Oh),김양모(Y.M. Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.10
Prototype NBI(Neurtal Beam Injector), which is tested at KAERI(Kaeri Atomic Energy Research Instutide), is the facility for tokamak plasma ignition of the advanced nuclear fusion KSTAR(Korea Superconducting Tokamak Advanced Research). New NBI facility, which is the part of KSTAR tokamak, will be constructed during next three years. This investigation is focused on the preliminary test to construct the control system for KST AR NBI .before KST AR NBI facility is constructed