神光Ⅱ升级装置锥壳靶间接驱动快点火集成实验
Initial indirect cone-in-shell fast ignition integrated experiment on Shengguang Ⅱ-updated facility
1 中国工程物理研究院 激光聚变研究中心, 绵阳 621900
2 北京应用物理与计算数学研究所, 北京 100088
摘要
在神光Ⅱ升级装置上完成了国际上首次间接驱动快点火集成实验。实验采用双台阶脉冲整形激光注入黑腔产生X射线准等熵压缩锥壳靶,实现了高密度压缩,然后采用皮秒超短脉冲激光注入加热燃料。实验中观测到中子产额由皮秒激光注入前的5×103增加到2.2×105,中子产额增益达到44倍,实验证实了皮秒激光具有明显燃料加热效果。该实验为进一步开展快点火热斑形成效率和相关物理研究奠定了基础。
Abstract
Initial indirect cone-in-shell fast ignition integrated experiment was carried out on Shenguang Ⅱ-updated laser facility. The shaped laser pulses were injected into a hohlraum to compress a cone-in-shell target and achieve a higher density. Then a picosecond laser with hundreds joules energy was guided by a golden cone to irradiate the tip of the cone and generate hot electron flux to heat the compressed deuterium fuel. A maximum neutron yield of 2.2×105 was observed at a suitable injection timing of the picosecond laser, which is 44 times larger than that with no picosecond laser injection. These experiment results confirm the heating effect of the picosecond igniting laser.
谷渝秋, 张锋, 单连强, 毕碧, 陈家斌, 魏来, 李晋, 宋仔峰, 刘中杰, 杨祖华, 于明海, 崔波, 张镱, 刘红杰, 刘东晓, 王为武, 戴增海, 杨轶蒙, 杨雷, 张发强, 吴小军, 杜凯, 周维民, 曹磊峰, 张保汉, 吴俊峰, 任国利, 蔡洪波, 吴思忠, 曹莉华, 张华, 周沧涛, 贺贤土. 神光Ⅱ升级装置锥壳靶间接驱动快点火集成实验[J]. 强激光与粒子束, 2015, 27(11): 110101. Gu Yuqiu, Zhang Feng, Shan Lianqiang, Bi Bi, Chen Jiabin, Wei Lai, Li jin, Song Zifeng, Liu Zhongjie, Yang Zhuhua, Yu Minghai, Cui Bo, Zhang Yi, Liu Hongjie, Liu Dongxiao, Wang Weiwu, Dai Zenghai, Yang Yimeng, Yang Lei, Zhang Faqiang, Wu Xiaojun, Du Kai, Zhou Weimin, Cao Leifeng, Zhang Baohan, Wu Junfeng, Ren Guoli, Cai Hongbo, Wu Shizhong, Cao Lihua, Zhang Hua, Zhou Cangtao, He Xiantu. Initial indirect cone-in-shell fast ignition integrated experiment on Shengguang Ⅱ-updated facility[J]. High Power Laser and Particle Beams, 2015, 27(11): 110101.
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