基于机械制冷机的低温实验样品架的设计与验证  

Design and Development of Sample Holder for Low Temperature Experiment Based on Mechanical Refrigeration

作　　者：刘喜川[1] 代飞[1] 黎军[1] 陶朝友 雷海乐[1] LIU Xichuan;DAI Fei;LI Jun;TAO Chaoyou;LEI Haile(Research Centre of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,Sichuan,China)

机构地区：[1]中国工程物理研究院激光聚变研究中心,四川绵阳621900

出　　处：《真空与低温》2021年第4期353-358,共6页Vacuum and Cryogenics

基　　金：国家自然科学基金(11804318)。

摘　　要：为了研究低温下氢同位素样品的液化以及结晶生长规律,必须对样品进行大量的离线实验和验证,以获取样品在冷冻过程中的各项参数。采用基于G-M机械制冷的自适应减振/蓄冷/传热技术,设计并研制了离线实验用低温实验样品架,并进行了实验。结果表明,采用离线实验用低温实验样品架可获得与在线低温物理实验要求相同的温度和振动条件,即样品架最低温度为8.4 K,泡沫微球样品的振幅小于±400 nm。In order to study the liquefaction and layering of hydrogen isotope,a large number of off-line experiments must be carried out to obtain the parameters.In this paper,the adaptive vibration cooling/damping/heater transfer technology based on G-M mechanical refrigeration is adopted,and the sample holder for off-line experiment is designed and developed.The process parameters of preparing low-temperature experimental samples are obtained,which provides technical support for the preparation of samples for the cryogenic physics.The results show that the temperature condition of offline sample holder is the same as formal cryogenic physical experiment,which the minimum temperature of the target frame is 8.4 K and the vibration amplitude of the target is less than±400 nm.

关 键 词：氢同位素 低温制冷机 低温样品 减振 

分 类 号：TB651[一般工业技术—制冷工程]