| 超强超短脉冲激光诱发大尺度氘团簇聚变 |
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| 引用本文： | 刘红杰,郑志坚,谷渝秋,王红斌,陈家斌,吴玉池,王磊,李镛周,南性模,韩载旻,杨朝文.超强超短脉冲激光诱发大尺度氘团簇聚变[J].强激光与粒子束,2008,20(12). |
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| 作者姓名： | 刘红杰 郑志坚 谷渝秋 王红斌 陈家斌 吴玉池 王磊 李镛周 南性模 韩载旻 杨朝文 |
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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 等离子体物理国家重点实验室， 四川 绵阳 621900;2. 韩国原子能研究院, 大田305-600;3. 四川大学 物理科学与技术学院, 成都 610064 |
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| 基金项目： | 国家自然科学基金重点项目，中国工程物理研究院发展基金重点项目 |
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| 摘 要： | 利用低温脉冲气阀获得了平均含有3×103氘原子的氘团簇。在飞秒激光装置上实现了氘团簇聚变，每发中子产额为1×103。中子产额对激光功率密度敏感，保持激光能量不变，随着激光焦斑的变大，DD聚变中子产额逐渐增加，最大值出现在激光焦斑为470 mm时;继续增大激光焦斑，没有观察到中子信号。实验结果还表明激光氘团簇聚变发生的区域主要是激光辐照的等离子体热区，此区域内邻近氘团簇库仑爆炸发射的高能氘离子碰撞引发聚变反应。
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| 关 键 词： | 超强超短脉冲激光 氘团簇聚变 中子 飞行时间 有质动力 等离子体 |
| 收稿时间： | 1900-01-01; |
Nuclear fusion induced by ultra-short intense laser interaction with large deuterium clusters |
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| LIU Hong-jie,ZHENG Zhi-jian,GU Yu-qiu,WANG Hong-bin,CHEN Jia-bin,WU Yu-chi,WANG Lei,LI Yong-zhou,NAN Sung-mo,HAN Zai-min,YANG Chao-wen.Nuclear fusion induced by ultra-short intense laser interaction with large deuterium clusters[J].High Power Laser and Particle Beams,2008,20(12). |
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| Authors: | LIU Hong-jie ZHENG Zhi-jian GU Yu-qiu WANG Hong-bin CHEN Jia-bin WU Yu-chi WANG Lei LI Yong-zhou NAN Sung-mo HAN Zai-min YANG Chao-wen |
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| Institution: | 1. Research Center of Laser Fusion, CAEP, P.O.Box 919-986, Mianyang 621900, China;2. Korea Atomic Energy Research Institute, P.O.Box 105, Yuseong, Daejeon 305-600, Korea;3. School of Physical Science and Technology, Sichuan University, Chengdu 610064, China |
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| Abstract: | Large deuterium clusters were produced in a supersonic expansion of high pressure gases into vacuum through a 0.5 mm nozzle. The average size clusters (with 3×103 atoms) was verified by measuring the Rayleigh scattered signal using a He-Ne laser beam. Neutrons (2.45 MeV) from deuterium clusters fusion induced by the intense femtosecond (30 fs) laser pulse is experimentally demonstrated. The average neutron yield of 1×103 per shot was obtained. The yield grew slightly with the increasing of the laser spot size. No neutron was observed when the laser spot was larger than 470 micron. The fusion events mainly happened in the hot plasma region radiated by the intense laser. |
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| Keywords: | ultra-short intense laser deuterium cluster fusion neutron flight time ponderomotive force plasma |
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