Analyzing and relieving the thermal issues caused by fabrication details of a deuterium cryogenic target
| Autor: | Gao Shasha, Yang Hong, Xiaobo Qi, Tao Chaoyou, Dai Fei, Lin Wei, Juan Zhang, Jiang Baibin, Liang Juxi, Xie Jun, Kai Wang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Nuclear and High Energy Physics
Fabrication Materials science Nuclear engineering QC770-798 Instability Atomic and Molecular Physics and Optics Controllability Temperature gradient Nuclear Energy and Engineering Hohlraum Nuclear and particle physics. Atomic energy. Radioactivity Thermal Tube (fluid conveyance) Electrical and Electronic Engineering Inertial confinement fusion |
| Zdroj: | Matter and Radiation at Extremes, Vol 6, Iss 5, Pp 055901-055901-15 (2021) |
| Popis: | In inertial confinement fusion experiments, fuel quality is determined mainly by the thermal environment of the capsule in the layering procedure. Owing to the absence of a radial thermal gradient, formed deuterium–deuterium (DD) ice shells in the capsule are thermally instable. To obtain a solid DD layer with good quality and long lifetime, stringent demands must be placed on the thermal performance of cryogenic targets. In DD cryogenic target preparation, two issues arise, even after the capsule’s temperature uniformity has been improved by the use of thick aluminized films. The first is the inconsistent ice shape, which is related to the capsule’s thermal field. In this article, some typical fabrication details are investigated, including adhesive penetration during assembly, the presence of the fill tube, the optical properties of the hohlraum and film surfaces, the jacket–hohlraum connection, deviations in capsule location, and asymmetrical contact at the arm–jacket interfaces. Detailed comparisons of the thermal effects of these factors provide guidance for target optimization. The second issue is the instability of seeding crystals in the fill tube due to unsteadiness of the direction of the thermal gradient in the fill tube assembly. An additional thermal controller is proposed, analyzed, and optimized to provide robust controllability of tube temperature. The analysis results and optimization methods presented in this article should not only help in dealing with thermal issues associated with DD cryogenic targets, but also provide important references for engineering design of other cryogenic targets. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|