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Proceedings Paper

Powerful microfocus x-ray and hard x-ray 1 MA x-pinch plasma source for imaging, spectroscopy, and polarimetry
Author(s): Victor L. Kantsyrev; Bruno S. Bauer; Alla S. Shlyaptseva; Dmitri A. Fedin; Stephanie Hansen; Radu Presura; Stephan Fuelling; Steve Batie; Andrew Oxner; Harold Faretto; Nick D. Ouart; Sean Keely; Hank LeBeau; David Chamberlain
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Paper Abstract

The x-ray emission of Ti, Fe, Mo, W and Pt x-pinches are currently bieng studied at the Nevada Terawatt Facility z- pinch machine (0.9-1.0 MA, 100 ns). New x-ray diagnostics for time-resolved spectroscopy and imaging has been developed and used in x-pinch experiments. The total x- ray/EUV yield was more than 10 kJ. The minimum x-ray pulse duration was 1.1 ns (Mo, W, Pt). For Ti, Mo and W pinches x-ray pulses occurred in two or three groups in the narrow time intervals after the start of the current. The most compact emitting region has been observed for a planar-loop Mo x-pinch (the number of hot spots ranging from 1-5 with a minimum size smaller than 30 micrometers at (lambda) <1.5-2 Angstoms). Strong jets were observed (Ti, Fe, Mo) directed toward the discharge axis, perpendicular to the wires. A structure of an x-pinch includes energetic electron beams directed toward the anode and along wires. The total beam energy increases from Ti to W. A pulse of hard x-ray radiation was observed moving upwards along the axial axis with an energy of several hundred keV(Mo). The size of this source was smaller than 1 mm. The measurements of temperature and density of x-pinch plasmas were based on theoretical modeling of K-shell Ti and L-shell Mo spectra (Te=1.5 keV for Ti, 0.8 keV for Mo, Ne up to 2- 3x1022 cm-3 with 1-10% of hot electrons).

Paper Details

Date Published: 6 December 2001
PDF: 12 pages
Proc. SPIE 4502, Advances in Laboratory-based X-Ray Sources and Optics II, (6 December 2001); doi: 10.1117/12.449868
Show Author Affiliations
Victor L. Kantsyrev, Univ. of Nevada/Reno (United States)
Bruno S. Bauer, Univ. of Nevada/Reno (United States)
Alla S. Shlyaptseva, Univ. of Nevada/Reno (United States)
Dmitri A. Fedin, Univ. of Nevada/Reno (Russia)
Stephanie Hansen, Univ. of Nevada/Reno (United States)
Radu Presura, Univ. of Nevada/Reno (United States)
Stephan Fuelling, Univ. of Nevada/Reno (United States)
Steve Batie, Univ. of Nevada/Reno (United States)
Andrew Oxner, Univ. of Nevada/Reno (United States)
Harold Faretto, Univ. of Nevada/Reno (United States)
Nick D. Ouart, Univ. of Nevada/Reno (United States)
Sean Keely, Univ. of Nevada/Reno (United States)
Hank LeBeau, Univ. of Nevada/Reno (United States)
David Chamberlain, Univ. of Nevada/Reno (United States)

Published in SPIE Proceedings Vol. 4502:
Advances in Laboratory-based X-Ray Sources and Optics II
Ali M. Khounsary; Carolyn A. MacDonald, Editor(s)

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