摘要
作为托克马克装置HL-2M的大型低温泵,必须确保其具有足够的抽速和较好的抽气性能。通过直接模拟蒙特卡洛方法的研究表明,HL-2M内置式低温泵在高真空分子流条件下的对H2的抽速为51.29 m^3/s,对He的抽速为24.94m^3/s,对D_2的抽速为38.04m^3/s;裸泵与带有偏滤器结构的抽速对比表明,偏滤器的结构使得低温泵的抽速下降很多,应该在允许的条件下,进一步优化偏滤器的结构;通过对粘滞系数的变化得知,真空泵的抽速受粘滞系数的变化影响较大;而对整个抽气过程的动态评估结果表明,低温真空泵具有较好的响应时间,能够满足实验的需求。
Sufficient pumping speed and good pumping performance should be guaranteed for the large Tokamak HL-2M. Technical parameters that obtained by directly simulating with the Monte Carlo method for HL-2M built-in cryopump under molecular flow conditions including H2 pumping speed（48.6 m^3/s）, D2 pumping speed（34.8 m^3/s）and He pumping speed（20.6 m^3/s）.It shows that the speed for cryopump pump is affected by partial filter structure. It should be to optimize the structure of partial filter. The cryopump pumping speed can be influenced by the coefficient of viscosity, which was obtained by analyzing different viscous coefficient. The pumping process dynamic evaluation results show that the cryopump has a good response time to meet the demand, which can meet the requirement of the experiment.
作者
李勇
张志军
邱银
卢勇
李强
LI Yong ZHANG Zhi-jun QIU Yin LU Yong LI Qiang(Southwestern Institute of Physics, Chengdu 610041, China School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, China)
出处
《真空》
CAS
2016年第5期11-16,共6页
Vacuum
基金
国家磁约束核聚变能发展研究专项(2015GB106000)
NSFC-广东联合基金(第二期)超级计算科学应用研究专项资助
国家自然科学基金委和国家超级计算广州中心项目
