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铝-钨丝混编阵的Z-箍缩实验研究

Experimental studies of Z-pinches of mixed wire array with aluminum and tungsten

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【作者】 宁成李正宏华欣生徐荣昆彭先觉许泽平杨建伦郭存蒋世伦丰树平杨礼兵晏成立宋凤军V.P.SmirnovYu.G.KalininA.S.KingsepA.S.ChernenkoE.V.Grabovsky

【Author】 Ning Cheng 1) Li Zheng-Hong 1) Hua Xin-Sheng 1) Xu Rong-Kun 1) Peng Xian-Jue 1) Xu Ze-Ping 1) Yang Jian-Lun 1) Guo Cun 1) Jiang Shi-Lun 1) Feng Shu-Ping 1) Yang Li-Bing 1) Yan Cheng-Li 1) Song Feng-Jun 1) V. P. Smirnov 2) Yu. G. Kalinin 2) A. S. Kingsep 2) A. S. Chernenko 2) E. V. Grabovsky 3) 1)(China Academy of Engineering Physics, Mianyang 621900,China) 2)(Russia Research Center “Kurchatov Institute ", Moscow, Russia) 3)(Troitsk Institute for Innovation and Fusion Research, Troitsk, Russia)

【机构】 中国工程物理研究院Russia Research Center “Kurchatov Institute "Troitsk Institute for Innovation and Fusion Research 绵阳621900绵阳621900MoscowRussiaTroitskRussia

【摘要】 利用铝丝和钨丝混合编制的丝阵作为Z 箍缩的负载 ,在俄罗斯Kurchatov研究所的S 30 0强流装置上对其Z 箍缩过程进行了实验研究 ,并与纯铝丝阵和纯钨丝阵的实验结果进行了比较 .不同材料组成的丝阵的Z 箍缩x射线能谱之间有明显差异 ,混编丝阵的铝K壳层的x射线辐射强度比纯铝丝阵的弱 ,在纯钨丝阵Z 箍缩中没有发现波长小于 1 6nm的线辐射 .混编丝阵Z 箍缩的x射线发光区域比纯铝丝阵的小 ,但比纯钨丝阵的大 ,混编丝阵的x射线产额比纯铝丝阵的大 ,但比纯钨丝阵的略低 .在驱动电流为 2 5— 2 8MA条件下 ,Z 箍缩的径向收缩比为 4— 5 ,x射线辐射脉冲脉宽为 2 5ns左右 ,峰值为 0 3— 0 5TW ,总能量为 10— 2 0kJ.激光探针的阴影像显示了丝阵等离子体形成的细致过程 ,还表明了等离子体的边界面不够清晰 ,其不稳定性有明显的发展 ,内部有丰富的结构 .

【Abstract】 In the form of joint experiment between China and Russia, the experimental studies of Z-pinches of mixed wire array of aluminum (A1) and tungsten (W) were carried out on S-300 generator,which was located on Kurchatov Institute of Russia. The experimental results were compared with those of single A1 array and single W array, respectively. There are obvious difference between mixed one and single one in their photon spectral distributions. The intensity of K-series emission lines from the mixed wire array Z-pinch is lower than that from single A1 array. The radiated lines with wavelengths less than 1.6nm were not found in single W array Z-pinches. In the Z-pinch processes, the area radiating x-arys in mixed wire array is smaller than that of single A1 array, but is larger than that of single W array. The radiated energy from mixed wire array Z-pinch is higher than that from single A1 array, but is slightly lower than that from single W array. The FWHM of x-ray pulse with a maximal power 0.3—0.5TW and total energy 10—20kJ is about 25ns, which radiated from Z-pinches with a radial convergence of 4—5 on S-300 generator. The shadow photograph of the mixed wire-array Z-pinch plasma by laser probe shows that the core-corona configuration was formed and the corona was moving toward the center axis during the wire-array plasma formation, that the interface of the plasma is not clear, and that therer are a number of structures inside. They also suggests that there was an obvious development of Magneto Rayleigh-Taylor instability in the Z-pinch process as well.

【关键词】 Z-箍缩混编丝阵S-300强流装置
【Key words】 Z-pinchmixed wire arrayS-300 generator
【基金】 国家自然科学基金 (批准号 :10 0 3 5 0 3 0和 10 3 75 0 10 )资助的课题~~
  • 【文献出处】 物理学报 ,Acta Physica Sinica , 编辑部邮箱 ,2004年07期
  • 【分类号】O4-33
  • 【被引频次】9
  • 【下载频次】94
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