Variations of implosion asymmetry with hohlraum length and time in indirect-drive inertial confinement fusion
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Published:2013
Issue:22
Volume:62
Page:225204
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ISSN:1000-3290
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Container-title:Acta Physica Sinica
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language:
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Short-container-title:Acta Phys. Sin.
Author:
Li Hang ,Pu Yu-Dong ,Jing Long-Fei ,Lin Zhi-Wei ,Chen Bo-Lun ,Jiang Wei ,Zhou Jin-Yu ,Huang Tian-Xuan ,Zhang Hai-Ying ,Yu Rui-Zhen ,Zhang Ji-Yan ,Miao Wen-Yong ,Zheng Zhi-Jian ,Cao Zhu-Rong ,Yang Jia-Min ,Liu Shen-Ye ,Jiang Shao-En ,Ding Yong-Kun ,Kuang Long-Yu ,Hu Guang-Yue ,Zheng Jian , ,
Abstract
In order to achieve the high density compression in laser indirect-drive inertial confinement fusion, the implosion symmetry and hohlraum radiation uniformity are strictly required. To study the variations of implosion asymmetry with hohlraum length and time, three kinds of hohlraum lengths are adopted in experiment. X-ray emission from capsule fuel is measured by an X-ray framing camera. Based on measured capsule compression process and ellipticity variation, it is preliminarily judged that the medium hohlraum of 1700 μm long is the closest to implosion symmetry demand of Shenguang Ⅲ prototype laser facility. Time-resolved implosion asymmetry is derived from a simplified analytic model, in which used is the time-resolved hohlraum radiation nonuniformity derived from a view-factor code. The derived results of the time-resolved implosion asymmetry are basically in agreement with experimental results. The physical mechanism for how hohlraum radiation nonuniformity evolution induces the variations of implosion asymmetry with hohlraum length and time is analyzed.
Publisher
Acta Physica Sinica, Chinese Physical Society and Institute of Physics, Chinese Academy of Sciences
Subject
General Physics and Astronomy
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