【作者】 胡纯栋； 谢远来； NBI组；

【Author】 HU Chun-dong,XIE Yuan-lai,NBI Group (Institute of Plasma Physics,Chinese Academy of Sciences,Hefei 230031,China)

【机构】 中科院等离子体物理研究所；

【摘要】 中性束注入器(NBI)是一套用来产生高能带电粒子束并对其进行中性化的设备,为了实现国家重大科学工程项目EAST的科学目标,需研制MW级NBI(EAST-NBI)。针对EAST-NBI的基本工作原理,提出了该NBI对真空压力分布和真空获得设备的基本性能要求;通过对不同真空系统布局的性能分析,选择确定了差份式真空抽气结构的总体布局;分析了EAST-NBI真空系统的气体负载来源及特性,设计采用两台低温冷凝泵作为真空主抽气泵,其冷凝抽气面积分别为8m~2和6m~2、均以低温冷凝屏的形式布置在真空系统的内部;给出了两低温冷凝屏的原理结构,确定了其冷却方式和温度控制模式。更多还原

【Abstract】 Neutral beam injector is an equipment that is used to produce and then to neutralize high energetic particle beam. A neutral beam injector(EAST-NBI) with MW magnitude neutral beam power is considered to be developed to support the EAST physical research.The requirements for vacuum system were analyzed after introducing the principle of EAST-NBI.A differential vacuum system structure was chosen after analyzing the performance of different vacuum pumping system structure.The gas sources and their characteristics were analyzed,and two inserted type cryocondensation pumps were chosen as main vacuum pump.The schematic structure of the two cryocondensation pump with pumping area 8 m~2and 6 m~2 were given and their cooling method and temperature control mode were determined.更多还原