Author Affiliations
Abstract
1 Rochester Institute of Technology, 78 Lomb Memorial Drive, Rochester, NY 14623-5604, USA
2 Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, NY 14623-1299, USA
3 General Atomics, San Diego, CA 92186, USA
4 Lawrence Livermore National Laboratory, Livermore, CA 94550, USA
A unique approach for permeation filling of nonpermeable inertial confinement fusion target capsules with deuterium–tritium (DT) is presented. This process uses a permeable capsule coupled into the final target capsule with a 0.03-mm-diameter fill tube. Leak free permeation filling of glow-discharge polymerization (GDP) targets using this method have been successfully demonstrated, as well as ice layering of the target, yielding an inner ice surface roughness of 1-$\unicode[STIX]{x03BC}$m rms (root mean square). Finally, the measured DT ice-thickness profile for this experiment was used to validate a thermal model’s prediction of the same thickness profile.
fill-tube inertial confinement fusion permeation fill target capsule High Power Laser Science and Engineering
2017, 5(1): 010000e6
1 西安交通大学 能源与动力工程学院, 西安 710049
2 中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621900
低温冷冻靶是惯性约束核聚变装置的关键部件之一。冷冻靶靶丸位于黑腔内部, 需要利用微管完成燃料充注。针对燃料在微管内发生气液相变后流入靶丸这一关键过程, 研究了微通道流体与常规流体流动传热的差异。基于微通道特性对流体流动传热方程进行修正, 同时建立了气液相变模型, 对微充气管内燃料充注过程进行了数值计算分析。得到重力和表面张力的影响, 在微通道中, 重力作用可以忽略, 表面张力起重要作用。得到了微尺度效应包括速度滑移和温度跳跃对流动传热过程的影响。对多种充气管结构进行比较分析, 为选型提供指导。通过选择不同进口条件和出口条件, 对充注量控制和充注条件选择提供了指导方案, 实际充注时需要同时提高进口温度和压力, 保证连续可控充注。
低温冷冻靶 充气管 微通道 冷凝 cryogenic target fill tube microchannel condensation 强激光与粒子束
2017, 29(12): 122001
