| 斜辐照激光等离子体辐射X光子特性 |
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| 引用本文： | 王瑞荣,陈伟民,谢东珠.斜辐照激光等离子体辐射X光子特性[J].强激光与粒子束,2008,20(3):387-390. |
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| 作者姓名： | 王瑞荣 陈伟民 谢东珠 |
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| 作者单位： | 1. 重庆大学 光电技术及系统教育部重点实验室， 重庆400044 ； 2. 上海激光等离子体研究所 高功率激光物理国家重点实验室， 上海201800；3. 上海师范大学 数理信息学院， 上海 200234 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 在神光Ⅱ高功率激光装置上，实验研究了激光斜辐照形成的激光等离子体辐射X射线光子的特性及真空喷射热等离子体流的方向。采用针孔X射线相机测量了钕玻璃激光（基频1.053 μm）辐照铝靶形成的激光铝等离子体辐射的X射线光子的空间分布，并针对正入射和入射激光斜辐照情况下测得的X射线光子量及特性进行了分析和比较。结果发现：入射激光斜辐照固体平面靶产生的向真空喷射热等离子体流的方向是垂直靶面（即法线方向）；正入射和斜入射激光叠加驱动靶时，一定程度上能改善激光辐照的均匀性，但等离子体源辐射的X射线光子数并未发现显著地增加；当激光斜辐照与靶相互作用时，激光能量被等离子体吸收下降。
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| 关 键 词： | 斜辐照 等离子体喷射 均匀性 X射线光子 |
| 文章编号： | 1001-4322(2008)03-0387-04 |
| 收稿时间： | 2007/9/25 |
| 修稿时间： | 2007年9月25日 |
Characteristics of X-ray photons in tilted incident laser-produced plasma |
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| WANG Rui-rong,CHEN Wei-min,XIE Dong-zhu.Characteristics of X-ray photons in tilted incident laser-produced plasma[J].High Power Laser and Particle Beams,2008,20(3):387-390. |
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| Authors: | WANG Rui-rong CHEN Wei-min XIE Dong-zhu |
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| Institution: | 1. Key Laboratory of Optoelectronic Technology and System, Chongqing University, Chongqing 400044, China; 2. State Key Laboratory of High Power Laser and Physics, Shanghai Institute of Laser Plasma,P. O. Box 800-229, Shanghai 201800, China;3. Mathematics and Sciences College, Shanghai Normal University, Shanghai 200234, China |
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| Abstract: | Characteristics of X-ray and spout direction of heat plasma flow were studied on Shenguang-Ⅱ laser facility. Using of pinhole X-ray camera, X-ray photons from the plasma of aluminum (Al) irradiated by 1.053 μm laser, was measured and analysed. It is observed that the spatial distribution of X-ray photons in Al plasma for tilted irradiation is symmetic at the center of the target. The spout direction of heat plasma flow is inferred by the distribution contour of X-ray photons. The experimental results show that the spout direction of heat plasma flow is normal to target plane and the output intensity of X-ray photons does not increase significantly for tilted laser incidence. Uniformity of laser energy deposition is improved by superposing tilted incident and laser perpendicularly incide |
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| Keywords: | Plasma spout Uniformity X-ray photons |
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