Investigation of High-Temperature Bright Plasma X-ray Sources Produced in 5-MA X-Pinch Experiments

Sinars, Daniel Brian; McBride, R. D.; Pikuz, S. A.; Shelkovenko, T. A.; Wenger, D. F.; Cuneo, M. E.; Yu, Edmund; Chittenden, J. P.; Harding, Eric; Hansen, Stephanie B.; Peyton, B. P.; Ampleford, D. J.; Jennings, Christopher

doi:10.1103/physrevlett.109.155002

Cited by 28 publications

(8 citation statements)

References 27 publications

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“…21 Al Z pinches at the Zebra generator do not generate intensive radiation with the wavelength <4 Å . Therefore, the spectrum of micro-pinches in the range of 4.4-7 Å was processed.…”

Section: Radiation Dynamics Of Micro-pinchesmentioning

confidence: 97%

“…21,23 MHD simulations showed that the plasma density may reach the extreme value of 400 g/cm 3 in the 5 MA X pinch. 21 In other Z-pinch configurations, micro-pinches and hot spots arise in the pinch spontaneously in time and space. These spots have not been investigated as thoroughly as the X-pinch hot spot.…”

Section: Introductionmentioning

confidence: 98%

“…[7][8][9][10][11][12] The electron temperature in bright spots (micro-pinches, hot spots, plasma points) varies from 0.3 to 3 keV in different experiments and pinch configurations. 3,4,13,14,[18][19][20][21] Micro-pinches in Z-pinch plasmas are the source of enhanced x-ray radiation. They contribute to the energy balance, x-ray production, and neutron yield in Z pinches.…”

Section: Introductionmentioning

confidence: 99%

“…10,13,14 A solid, machined X-pinch target driven by a 5 MA current can generate x-ray spectral continuum in the 5-9 keV range, which is radiated by a small plasma volume, 5 lm in diameter. 21 The electron temperature of the hot spot in this X-pinch was estimated to be 1.3-3.5 keV depending on the calculation model. Dynamics of the hot spot in the X pinch have been modeled elsewhere.…”

Section: Introductionmentioning

confidence: 99%

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Study of micro-pinches in wire-array Z pinches

et al. 2013

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Bright and hot areas with a high plasma density and temperature are observed in all kinds of Z pinches. We studied bright radiating spots produced by micro-pinches in cylindrical and planar wire-arrays at the 1 MA Zebra pulsed power generator using an x-ray streak camera synchronized with laser diagnostics, x-ray time-gated pinhole camera, and spectroscopy. Hot spots with extremely dense and relatively hot plasma arise during the collapse of the micro-pinches. These hot spots radiate a continuum spectrum with energy >2.5 keV. Typical micro-pinches in Al wire arrays generate x-ray bursts with durations of 0.4-1 ns in the soft x-ray range and 0.1-0.4 ns in the keV range. UV two-frame shadowgraphy shows spatial correlation of hot spots with the collapse and explosion of micro-pinches. Micro-pinches typically occur at the necks of the Z pinch, but can demonstrate a variety of parameters and different dynamics. An analysis of x-ray streak images shows that micro-pinches can generate >20% of the x-ray energy in some types of wire-array Z pinches. V C 2013 AIP Publishing LLC. [http://dx.

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“…21 Al Z pinches at the Zebra generator do not generate intensive radiation with the wavelength <4 Å . Therefore, the spectrum of micro-pinches in the range of 4.4-7 Å was processed.…”

Section: Radiation Dynamics Of Micro-pinchesmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Study of micro-pinches in wire-array Z pinches

et al. 2013

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“…Intense X-ray emission and short pulse duration have been demonstrated from X-pinches driven by currents ranging over two orders of magnitudes (10 4 -10 6 A). 11,12 The shot-to-shot reproducibility of X-pinch emission flux and source size is governed by the development of hot spot(s). Previous research indicates that increasing the number of wires used in an X-pinch substantially improves flux and reproducibility, 13 and recently hybrid X-pinches have produced encouraging results, improving reproducibility and single spot formation.…”

mentioning

confidence: 99%

Investigation into the dynamics of laser-cut foil X-pinches and their potential use for high repetition rate operation

Collins

Valdivia

Zick

et al. 2014

Applied Physics Letters

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We report on results from experiments using laser-cut X shaped foils (or foil X-pinches) driven by the 250 kA, 150 ns rise-time GenASIS Linear Transformer Driver. Optical probing of the laser-cut foil X-pinches shows considerable dynamic and qualitative similarity with the more traditional wire X-pinches. Results demonstrate excellent quality X-ray emission flux, timing, and source size. The foil X-pinches offer advantages such as improved, reproducible cross-point symmetry, and the opportunity for rep-rated operation, which is not possible with conventional X-pinches using wires.

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