Numerical investigation on the temperature control of a NIF cryogenic target

Cryogenic Engineering Conference 2015

材料科学;物理学

Sun, Y.^1 ; Zhou, G.^1 ; Li, Q.^1 ; Li, L.F.^1

State Key Laboratory of Technologies in Space Cryogenic Propellants, TIPC/CAS, Beijing

100190, China^1

关键词: Auxiliary heating;    Convection effects;    Cryogenic targets;    Heat transfer process;    Numerical investigations;    Temperature uniformity;    Theoretical foundations;    Tritium decay;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/101/1/012096/pdf
DOI  :  10.1088/1757-899X/101/1/012096

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Numerical investigation was performed on the temperature control of NIF cryogenic target in order to get a temperature uniformity of 0.1mK on the surface of the capsule. Heat transfer process was discussed to find out major factors in the temperature control, tamping gas heat transfer and free convection of the tamping gas was calculated. Spherically symmetric temperature field is required due to energy released from the tritium decay within the capsule, auxiliary heating is set on the hohlraum to compensate the higher heat loss caused by the lower tamping gas thermal resistance on the mid plane. Free convection effect of the tamping gas is reduced by separating the tamping gas with plastic films and independent temperature control of the cooling arm. This research may provide theoretical foundation and reference for temperature control on the cryogenic target.