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Studies of the initial phases of exploding W and Al wire and wire-array plasma formation using X-ray backlighting

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6 Author(s)
Sinars, D.B. ; Lab. of Plasma Studies, Cornell Univ., Ithaca, NY, USA ; Greenly, J.B. ; Pikuz, S.A. ; Shelkovenko, T.A.
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Summary form only given. Exploding W and Al wires and wire arrays have been investigated using direct (point-projection) X-ray backlighting as the principal diagnostic method. A 4.5 kA amplitude, 350 ns quarter-period rise time sinusoidal current source which damps in about 5 ps is delivered to one or more fine W (7.5, 10 or 13.5 /spl mu/m) or Al (13.5 or 25 /spl mu/m) wires approximately 6 cm away from one or two Mo X-pinch X-ray backlighter sources. The X-pinches are placed in parallel between the output electrodes of the 450 kA, 100 ns XP pulser at Cornell University, each thereby producing a sub-nanosecond X-ray pulse. The source size is small enough to permit micron-scale spatial resolution images of the exploding wires on X-ray film. By varying the relative timing between pulsing the current source for the W or Al wire or wires and the XP pulser, images of the initial explosion phase of W and Al wires have been obtained at times ranging upwards from about 100 ns after the start of the 4.5 kA current source.

Published in:

Plasma Science, 1999. ICOPS '99. IEEE Conference Record - Abstracts. 1999 IEEE International Conference on

Date of Conference:

24-24 June 1999