Powerful microfocus x-ray and hard x-ray 1 MA x-pinch plasma source for imaging, spectroscopy, and polarimetry

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

doi:10.1117/12.449868

6 December 2001 Powerful microfocus x-ray and hard x-ray 1 MA x-pinch plasma source for imaging, spectroscopy, and polarimetry

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

Author Affiliations +

Proceedings Volume 4502, Advances in Laboratory-based X-Ray Sources and Optics II; (2001) https://doi.org/10.1117/12.449868
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

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 (T_e=1.5 keV for Ti, 0.8 keV for Mo, N_e up to 2- 3x10²² cm^-3 with 1-10% of hot electrons).

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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, and David Chamberlain "Powerful microfocus x-ray and hard x-ray 1 MA x-pinch plasma source for imaging, spectroscopy, and polarimetry", Proc. SPIE 4502, Advances in Laboratory-based X-Ray Sources and Optics II, (6 December 2001); https://doi.org/10.1117/12.449868

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