CAJ | 학술논문

针对 EAST 装置大型低温杜瓦中内外冷屏系统存在的泄漏及对外真空室真空度的影响，采用氦质谱负压真空、正压真空及吸枪法相结合的方法，确定了多处泄漏点并分析了泄漏原因，通过修复使EAST外真空室低温运行时的压强﹤1×10-4Pa ，满足了EAST外真空室运行的需要。EAST内外冷屏系统的检漏方法和经验可以运用到大型、复杂的和具有狭小活动空间的真空系统检漏，尤其是对多管道、复杂材料的检漏具有一定的参考价值。
침대 EAST 장치대형저온두와중내외랭병계통존재적설루급대외진공실진공도적영향，채용양질보부압진공、정압진공급흡창법상결합적방법，학정료다처설루점병분석료설루원인，통과수복사EAST외진공실저온운행시적압강﹤1×10-4Pa ，만족료EAST외진공실운행적수요。EAST내외랭병계통적검루방법화경험가이운용도대형、복잡적화구유협소활동공간적진공계통검루，우기시대다관도、복잡재료적검루구유일정적삼고개치。
To solve the leakage of thermal shield system in EAST cryostat and its impact on pressure of cryogenic vacuum chamber, we adopted a combination method including vacuum leak detection, pressurized leak detection and sniffer leak detection. We found some leak parts and analyzed the cause of leakage. By mending the thermal shield system, the pressure of the cryogenic vacuum chamber is less than 1×10-4Pa at cryogenic state and meets the need of operation. The method and experience of EAST thermal shield system leak detection can be adopted to large-sized, complicated and narrow space vacuum system. Especially, the method and experience have a certain reference value in the leak detection of multi-pipeline and complicated material vacuum system.