A liquid helium temperature target with a 10K vapor shield for shock compression experiment in the environment condition of 100Pa

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（3）
• 页码范围: 349-353
• 页数: 5页
• 分类号: TB61
• 语种: 中文

摘要

The shock compression experiment of liquid helium is an available way to gain properties of specimen at high temperatures and pressures.Based on Fluent,a thermal insulation analysis and design of a liquid helium temperature target in the environment condition of 100 Pa for shock compression experiment is performed.Then,a cryogenic target with a 10 K helium vapor shield and a separated vacuum interval is particularly developed.A lowest temperature of 3.63 K and a stable temperature of 3.70 K in the specimen cavity with an accuracy of 0.1 K are obtained by means of continuous flow and vacuum cooling.Both time-consuming and temperature stability are well-suited to the requirements of the shock compression experiment.The results show that the calculated and experimental data well-matched each other.The simulation method may be effective and feasible for the optimal design of the cryogenic target.