| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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X-ray backlighting of two-wire Z-pinch plasma using X-pinch |
| Zhao Tong (赵彤), Zou Xiao-Bing (邹晓兵), Zhang Ran (张然), Wang Xin-Xin (王新新) |
| State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China |
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Abstract Two 50-μm Mo wires in parallel used as a Z-pinch load are electrically exploded with a pulsed current rising to 275 kA in 125 ns and their explosion processes are backlighted using an X-pinch as an x-ray source. The backlighting images show clearly the processes similar to those occurring in the initial stages of a cylindrical wire-array Z-pinch, including the electric explosion of single wires characterised by the dense wire cores surrounded by a low-density coronal plasma, the expansion of the exploding wire, the sausage instability (m=0) in the coronal plasma around each wire, the motion of the coronal plasma as well as the wire core toward the current centroid, the formation of the precursor plasma column with a twist structure something like that of higher mode instability, especially the kink instability (m=1).
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Received: 06 November 2009
Accepted manuscript online:
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PACS:
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52.58.Lq
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(Z-pinches, plasma focus, and other pinch devices)
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52.25.Os
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(Emission, absorption, and scattering of electromagnetic radiation ?)
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52.80.Qj
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(Explosions; exploding wires)
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52.35.Py
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(Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10635050), the Foundation for the Author of National Excellent Doctoral Dissertation of China (Grant No. 200748), the International Atomic Energy Agency (Grant No. 14509), the Postdoctoral Science Foundation of China (Grant No. 20090450355), and the Special Research Fund for the Doctoral Program of Higher Education, China (Grant No. 200800030037). |
Cite this article:
Zhao Tong (赵彤), Zou Xiao-Bing (邹晓兵), Zhang Ran (张然), Wang Xin-Xin (王新新) X-ray backlighting of two-wire Z-pinch plasma using X-pinch 2010 Chin. Phys. B 19 075205
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