| 钛空腔靶高强度keV X射线源的实验研究 |
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| 引用本文： | 涂绍勇,胡广月,缪文勇,袁永腾,赵斌,郑坚,侯立飞,晏骥,詹夏宇,江少恩,丁永坤. 钛空腔靶高强度keV X射线源的实验研究[J]. 强激光与粒子束, 2015, 27(3): 032021-183. DOI: 10.11884/HPLPB201527.032021 |
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| 作者姓名： | 涂绍勇 胡广月 缪文勇 袁永腾 赵斌 郑坚 侯立飞 晏骥 詹夏宇 江少恩 丁永坤 |
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| 作者单位： | 1.中国科学技术大学 近代物理系, 合肥 230026; |
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| 基金项目： | 国家自然科学基金项目(11105147,11375197,11175179);教育部创新团队基金项目(IRT1190);强场激光物理国家重点实验室开放基金项目 |
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| 摘 要： | 利用神光-Ⅲ原型激光装置实验研究了8束ns激光脉冲从一端注入钛空腔靶产生的keV X射线源的辐射特征,发现keV X射线主要产生于腔轴附近;钛空腔靶内径过大时keV X射线能流的峰值强度较低,内径过小时keV X射线能流的持续时间较短。为了在4π空间内使钛空腔靶获得最大的X射线(4~7keV能段)转换效率,腔内径的最优值在1000~1300μm附近,此时的keV X射线转换效率为4.7%,是相同激光参数下钛平面靶的2倍左右。激光单端注入有底部钛膜和无底部钛膜的空腔靶对比实验显示,底膜能够增强keV X射线的发射。
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| 关 键 词： | X射线源 激光 空腔靶 转换效率 |
| 收稿时间： | 2014-07-02 |
Experimental investigation of titanium hohlraum as intense multi-keV X-ray source |
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| Tu Shaoyong;Hu Guangyue;Miao Wenyong;Yuan Yongteng;Zhao Bin;Zheng Jian;Hou Lifei;Yan Ji;Zhan Xiayu;Jiang Shaoen;Ding Yongkun. Experimental investigation of titanium hohlraum as intense multi-keV X-ray source[J]. High Power Laser and Particle Beams, 2015, 27(3): 032021-183. DOI: 10.11884/HPLPB201527.032021 |
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| Authors: | Tu Shaoyong Hu Guangyue Miao Wenyong Yuan Yongteng Zhao Bin Zheng Jian Hou Lifei Yan Ji Zhan Xiayu Jiang Shaoen Ding Yongkun |
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| Affiliation: | 1.Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;2.Research Center of Laser Fusion,CAEP,P.O.Box 919-988,Mianyang 621900,China |
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| Abstract: | The titanium hohlraum as a bright X-ray source was explored on the Shenguang-Ⅲ prototype laser facility. It shows that the multi-keV X-rays are mainly generated near the cylinder axis. The multi-keV X-ray emission region and the duration increase with the increase of the hohlraum inner diameter, but the X-ray flux decreases, thus the optimal hohlraum inner diameter is in the range of 1000-1300 m for Shenguang-Ⅲ prototype laser facility. The presence of the bottom foil for the hohlraum can enhance the X-ray emission. The maximum X-ray conversion efficiency of the titanium hohlraums is 4.7% in 4 space, which is larger than that of the solid planar target. |
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