中国物理B ›› 2007, Vol. 16 ›› Issue (3): 772-777.doi: 10.1088/1009-1963/16/3/035

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Experimental study on imploding characteristics of wire-array Z pinches on Qiangguang-1 facility

王真1, 徐荣昆2, 杨建伦2, 华欣生2, 李林波2, 许泽平2, 宁家敏2, 宋凤军2   

  1. (1)Department of Engineering Physics, Tsinghua University, Beijing 100084, China ;Institute of Nuclear Physics and Chemistry, Mianyang 621900, China; (2)Institute of Nuclear Physics and Chemistry, Mianyang 621900, China
  • 收稿日期:2006-01-09 修回日期:2006-07-21 出版日期:2007-03-20 发布日期:2007-03-20

Experimental study on imploding characteristics of wire-array Z pinches on Qiangguang-1 facility

Wang Zhen(王真)a)b), Xu Rong-Kun(徐荣昆)b), Yang Jian-Lun(杨建伦)b), Hua Xin-Sheng(华欣生)b), Li Lin-Bo(李林波)b), Xu Ze-Ping(许泽平)b), Ning Jia-Min(宁家敏)b), and Song Feng-Jun(宋凤军)b)   

  1. a Department of Engineering Physics, Tsinghua University, Beijing 100084, China; b Institute of Nuclear Physics and Chemistry, Mianyang 621900, China
  • Received:2006-01-09 Revised:2006-07-21 Online:2007-03-20 Published:2007-03-20

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摘要： To investigate the imploding characteristics of cylindrical wire array, experiments with load current varying from 1.5\,MA to 1.7\,MA were carried out on the Qiangguang-1 facility. The complicated temporal-spatial distribution of x-ray radiation was measured by the one-dimensional (1D) x-ray imaging system. Other diagnostic equipments including the x-ray power meter (XRPM) and the time-integrated pinhole camera were used to record time-resolved x-ray power pulse and pinhole x-ray images. Analysis shows that the fast leading edge of the local x-ray radiation pulse is of primary importance in sharpening x-ray power pulse rather than the temporal synchrony and the spatial uniformity of implosion. Experimental results indicated that the better axial imploding synchrony, the faster the increase of x-ray power for an array consisting of 32 tungsten wires of 5\mum diameter than for the others, and the higher the x-ray radiation power with maximal convergence ratio (r_0/r_1) of 10.5. A `zipper-like' effect of x-ray radiation extending from the anode to the cathode was also observed.

关键词: wire array, Z pinch, x-ray power, temporal-spatial distribution

Abstract: To investigate the imploding characteristics of cylindrical wire array, experiments with load current varying from 1.5 MA to 1.7 MA were carried out on the Qiangguang-1 facility. The complicated temporal-spatial distribution of x-ray radiation was measured by the one-dimensional (1D) x-ray imaging system. Other diagnostic equipments including the x-ray power meter (XRPM) and the time-integrated pinhole camera were used to record time-resolved x-ray power pulse and pinhole x-ray images. Analysis shows that the fast leading edge of the local x-ray radiation pulse is of primary importance in sharpening x-ray power pulse rather than the temporal synchrony and the spatial uniformity of implosion. Experimental results indicated that the better axial imploding synchrony, the faster the increase of x-ray power for an array consisting of 32 tungsten wires of 5$\mu$m diameter than for the others, and the higher the x-ray radiation power with maximal convergence ratio ($r_0/r_1$) of 10.5. A `zipper-like' effect of x-ray radiation extending from the anode to the cathode was also observed.

Key words: wire array, Z pinch, x-ray power, temporal-spatial distribution

中图分类号:  (Z-pinches, plasma focus, and other pinch devices)

  • 52.58.Lq
52.25.Gj (Fluctuation and chaos phenomena) 52.70.La (X-ray and γ-ray measurements)