Hybrid X-pinch with conical electrodes

Shelkovenko, T. A.; Pikuz, S. A.; Cahill, A. D.; Knapp, Patrick; Hammer, D. A.; Sinars, Daniel Brian; Tilikin, I. N.; Mishin, Sergey N.

doi:10.1063/1.3504226

Cited by 66 publications

(32 citation statements)

References 30 publications

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“…A hybrid X-pinch (HXP) configuration consisting of solid conical electrodes connected by a wire was suggested to simplify X pinch loading and make X pinches more predictable [6]. Hybrid X pinches have one more benefit compare with standard X-pinches (SXPs).…”

Section: Introductionmentioning

confidence: 99%

Hard X-rays from hybrid X pinches

Shelkovenko¹,

Pikuz²,

Hoyt³

et al. 2014

AIP Conference Proceedings

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Section: Introductionmentioning

confidence: 99%

Hard X-rays from hybrid X pinches

Shelkovenko¹,

Pikuz²,

Hoyt³

et al. 2014

AIP Conference Proceedings

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“…These two wires shared the COBRA return current with three 12.5 mm diameter return current posts. A hybrid x-pinch 10 made from a single 152 μm Mo wire spanning the ∼1 mm gap between two conical W-Cu alloy electrodes formed the primary load and was used as the backlighter x-ray source. A specially designed spectrometer using two spherically bent quartz 1010 crystals, both with dimensions 16 × 52 mm and radius of curvature equal to 180 mm, described in Ref.…”

Section: Methodsmentioning

confidence: 99%

Calibration and analysis of spatially resolved x-ray absorption spectra from a nonuniform plasma

Knapp

Hansen

Pikuz

et al. 2012

Review of Scientific Instruments

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We report here the calibration and analysis techniques used to obtain spatially resolved density and temperature measurements of a pair of imploding aluminum wires from x-ray absorption spectra. A step wedge is used to measure backlighter fluence at the film, allowing transmission through the sample to be measured with an accuracy of ±14% or better. A genetic algorithm is used to search the allowed plasma parameter space and fit synthetic spectra with 20 μm spatial resolution to the measured spectra, taking into account that the object plasma nonuniformity must be physically reasonable. The inferred plasma conditions must be allowed to vary along the absorption path in order to obtain a fit to the spectral data. The temperature is estimated to be accurate to within ±25% and the density to within a factor of two. This information is used to construct two-dimensional maps of the density and temperature of the object plasma.

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“…The SATURN experiments extend previous work on the 1 MA, 100-ns COBRA facility [16]. We fielded several X-pinch load designs that were first evaluated on 1 MA experiments, including large wire-number cylindrical wire arrays twisted into an X-pinch [16], nested multi-layered wire arrays twisted into an X-pinch [17], and a hybrid configuration in which a single wire is strung across two conical electrodes [16,18,19]. However, most of our SATURN experiments used X-pinch loads with solid, machined cross points as shown in Fig.…”

mentioning

confidence: 99%