Spatial-temporal modulation method of nanosecond laser for the double-cone ignition scheme

被引：3

作者：

Zhang, Yujia ^{[1
,2
]}

Fan, Wei ^{[1
,2
]}

Lu, Xinghua ^{[1
,2
]}

Wang, Jiangfeng ^{[1
,2
]}

Wang, Xiaochao ^{[1
,2
]}

Zhang, Yanli ^{[1
,2
]}

Jiang, Xiuqing ^{[1
,2
]}

Wang, Bingyan ^{[1
,2
]}

Wu, Fuyuan ^{[3
]}

Wang, Weimin ^{[4
,5
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Key Lab High Power Laser & Phys, Shanghai 201800, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Shanghai Jiao Tong Univ, Sch Phys & Astron, Key Lab Laser Plasmas, MOE, Shanghai 200240, Peoples R China

[4] Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China

[5] Renmin Univ China, Beijing Key Lab Optoelect Funct Mat & Micronano De, Beijing 100872, Peoples R China

来源：

OPTICS EXPRESS | 2024年 / 32卷 / 22期

关键词：

INERTIAL-CONFINEMENT FUSION; DRIVE;

D O I：

10.1364/OE.538941

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In order to improve the stability of the pulse, realize the high requirements of the direct drive ignition design for the uniformity of the target irradiation, reduce the interference of laser plasma instability, and improve the laser-target coupling efficiency, a nanosecond laser spatial-temporal modulation of high-power laser driver for double-cone ignition (DCI) research was proposed. Under the premise of satisfying the near-isentropic compression waveform of driving implosion, the time-power curves of all sub-beams in the facility are redistributed to reduce the waveform contrast ratio of each sub-beam. A fewer number of sub-beams are utilized to generate low-power foot pulses, which are focused on the target surface of the initial radius. And the remaining sub-beams are utilized to generate high-power driving main pulses, which are focused on a relatively small target surface. It is shown that the stability of the time-power curve of each sub-beam and the power balance control ability can be effectively improved by redistributing. At the same time, the variable focal spot control can be realized to reduce the influence of cross-beam energy transfer (CBET).

引用

页码：39483 / 39496

页数：14

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