Study of X-pinch dynamics using a low current (25 kA) and slower current (400 ns) pulse

Collins, Gilbert; Valdivia, M. P.; Zick, T.; Madden, R.; Haines, M. G.; Beg, F. N.

doi:10.1063/1.4798389

Cited by 13 publications

(3 citation statements)

References 26 publications

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“…Recently, Pavez et al [24] have obtained the x-ray source of 70 ± 20 µm x-ray source using a 0.24 kA ns −1 current driver. To date, the slowest current driver of current of 25 kA and 400 ns rise time have been used to study X-pinch dynamics by Collins et al [25].…”

Section: Superannuatedmentioning

confidence: 99%

Study of microsecond X-pinches of refractory and non-refractory metals

Andola¹,

Jaiswar²,

Kaushik³

et al. 2022

J. Phys. D: Appl. Phys.

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In this report, we present a comparative study on the properties of x-rays from X-pinches made of two groups of metallic wires. The results were obtained on a small current driver having dI/dt of 0.04-0.11 kA/ns. The X-pinches made of refractory (Mo and W) and non-refractory (Al, Cu) wires were studied for the current required to pinch and their x-ray parameters such as x-ray yield, timing, jitter, number of bursts, and source size. It has been observed that despite lower linear mass density, the Cu group requires a higher current for plasma to pinch than the W group X-pinches. For a given configuration, a faster current compresses the plasma at a higher current which leads to comparatively higher x-ray yield. Substantial enhancement in the quality of x-rays has also been observed in wires with few micron thick dielectric coating. The results of this work can be useful in the development of a small capacitive X-pinch system suitable for studies related to high energy density physics.

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Section: Superannuatedmentioning

confidence: 99%

Study of microsecond X-pinches of refractory and non-refractory metals

Andola¹,

Jaiswar²,

Kaushik³

et al. 2022

J. Phys. D: Appl. Phys.

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“…On the other hand, low current pulsed power generators delivering a few tens of kiloamperes in a load have a long history of applications in addition to fundamental research capabilities such as point projection x-ray radiography, the study of high-energy density plasma dynamics and the study of astrophysical plasma jets in the laboratory [1,[13][14][15][16]. Furthermore, such plasma generators have a significant role when used for the study of plasma dynamics aimed at the scaling of plasma conditions generated by larger currents.…”

Section: Introductionmentioning

confidence: 99%

Preliminary investigation on the use of low current pulsed power Z-pinch plasma devices for the study of early stage plasma instabilities

Kaselouris

Dimitriou

Fitilis

et al. 2017

Plasma Phys. Control. Fusion

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This article addresses key features for the implementation of low current pulsed power plasma devices for the study of matter dynamics from the solid to the plasma phase. The renewed interest in such low current plasma devices lies in the need to investigate methods for the mitigation of prompt seeding mechanisms for the generation of plasma instabilities. The low current when driven into thick wires (skin effect mode) allows for the simultaneous existence of all phases of matter from solid to plasma. Such studies are important for the concept of inertial confinement fusion where the mitigation of the instability seeding mechanisms arising from the very early moments within the target's heating is of crucial importance. Similarly, in the magnetized liner inertial fusion concept it is an open question as to how much surface nonuniformity correlates with the magneto-Rayleigh-Taylor instability, which develops during the implosion. This study presents experimental and simulation results, which demonstrate that the use of low current pulsed power devices in conjunction with appropriate diagnostics can be important for studying seeding mechanisms for the imminent generation of plasma instabilities in future research.

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“…At the cross-point of the X, a micro zpinch is formed with tens of lm in diameter and 200-700 lm in length. 9,10 The micro z-pinch ultimately collapses, emitting soft X-rays from one or more sources. 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).…”

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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Study of X-pinch dynamics using a low current (25 kA) and slower current (400 ns) pulse

Cited by 13 publications

References 26 publications

Study of microsecond X-pinches of refractory and non-refractory metals

Study of microsecond X-pinches of refractory and non-refractory metals

Preliminary investigation on the use of low current pulsed power Z-pinch plasma devices for the study of early stage plasma instabilities

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

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