ICF平面冷冻靶制备中充气速率效应

基于自主研制的平面冷冻靶打靶系统及微管注入法充气/冷冻技术，探讨了不同充气速率对平面冷冻靶制备的影响。研究表明:随着充气速率的减小，靶盒内氢气压强的变化速率越小，液化过程越明显，并且持续的时间越长；充气速率越小，越能准确测量液氢在该温度下的饱和蒸气压。同时，确定了最佳充气速率，建立了利用饱和蒸气压标定液氢温度的方法。研制的平面冷冻靶已经成功提供ICF物理实验。

Effect of filling rates on preparation of planar cryotargets

On the homemade planar-cryotarget shooting system, we have studied the effect of different filling rate on preparing planar cryotargets. The results show that with slower filling rate, the variation of hydrogen pressure in target is small. Furthermore, the liquefaction procedure is more observable and the corresponding duration of time is longer. Slower filling rate is helpful for the accurate measurement of saturated vapor pressure of liquid hydrogen at that temperature. A calibration method based on the saturated vapor pressure is developed to in-situ determine the temperature of liquid hydrogen isotopes in the target cell, and an optimum filling rate of 0.8 mL/min is obtained. These studies are important to provide high-quality and reliable hydrogen-isotopic planar cryotargets for ICF physical experiments.