| 基于纯冲击波聚心的准一维氘氘内爆物理实验 |
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| 引用本文： | 晏骥,郑建华,张兴,葛峰骏,康洞国,袁永腾,陈黎,宋仔峰,蒋炜,余波,陈伯伦,蒲昱东,黄天晅. 基于纯冲击波聚心的准一维氘氘内爆物理实验[J]. 强激光与粒子束, 2015, 27(8): 082007. DOI: 10.11884/HPLPB201527.082007 |
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| 作者姓名： | 晏骥 郑建华 张兴 葛峰骏 康洞国 袁永腾 陈黎 宋仔峰 蒋炜 余波 陈伯伦 蒲昱东 黄天晅 |
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| 作者单位： | 1.中国工程物理研究院 激光聚变研究中心, 四川 绵阳 621 900; |
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| 摘 要： | 在神光Ⅲ原型装置上利用八路6400J/1ns激光注入1100μm×1850μm的黑腔内产生210eV的高温辐射场,均匀辐照填充氘氘燃料的靶丸实现内爆。实验中选择高气压薄壳靶丸实现纯冲击波聚心内爆。通过闪烁体探测器、中子条纹相机等多套诊断设备获取了中子产额、聚变反应时刻等关键内爆参数。结合一维数值模拟表明,实验测量的中子产额与干净一维数值模拟计算的中子产额之比达到90%;同时通过人为破坏内爆对称性等方式表明,该设计下内爆中子产生机制集中于冲击波聚心,其内爆性能受到高维因素影响极低,从而实现了准一维内爆。
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| 关 键 词： | 惯性约束聚变 小收缩比 内爆对称性 流体力学不稳定性 |
| 收稿时间： | 2015-05-11 |
Quasi-one-dimensional implosion performance in D-D filled capsule based on pure shock yield mechanism |
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| Affiliation: | 1.Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China;2.Institute of Applied Physics and Computational Mathematics,Beijing 100094,China |
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| Abstract: | The D-D filled capsule implosion experiment is performed on Shenguang Ⅲ prototype laser facility. One-dimensional hydrodynamic numerical simulations show that neutron yield mechanism can be controlled by different D-D gas pressure and CH shell thickness. In experiments, the high gas filling pressure and thin shell thickness capsule is proposed for shock yield only implosion design. Meantime, many important implosion parameters such as neutron yield, bang-time are collected. The optimized experimental neutron yield is 9.9107 (9.7%) and the ratio between the experimental value and the 1D simulated value reached 90%. On the other hand, two types of unregular targets (extra high asymmetry and RT instability) are designed and experiments are proposed. The experimental results show that the multi-dimensional factors have little influence on implosion performance. Finally, the quasi-one-dimensional implosion is achieved based on high pressure and thin shell target. |
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