HT-7U真空室抽气窗口设计

Design of vacuum vessel pumping system in HT-7U device

HT-7U超导托卡马克装置是大型可控热核聚变实验装置,其内外真空系统是该装置的重要外部设备,内真空抽气系统为等离子体放电提供必要的清洁的真空条件,外真空系统为超导纵场线圈和极向场线圈及电流引线罐提供绝热真空。该文介绍了真空室及其抽气窗口的结构设计原则,根据装置运行的物理要求和抽气过程计算,设计组建了内外真空室的抽气机组,它们由主泵、预抽泵、前级泵、管道和阀门及其它附件组成,经试验运行表明,该设计是合理的。

The HT7U superconducting tokamak is an advanced device for the physical experiment on steadystate plasma. The vacuum pumping system is one of the important components of the HT7U device. The inner vacuum pumping system provides essential clear vacuum condition for plasma charging and the outer one provides insulated vacuum space for the superconducting toroidal andnufacture of the vacuum pumping system is investigated. The structure and design principle of the vacuum vessel and pumping windows are described. According to the physical demand and pumping process of the device, the vacuum pumping system has been constituted which includes main pump, roughing pump, back pump and some accessories. All structure analysis and mechanical test have been finished. It has been proved that the present vacuum pumping system design is reasonable.