Investigation of wire-array Z-pinches by laser probing diagnostics

Ivanov, V. V.; Anderson, A. A.; Papp, D.

doi:10.1063/1.5081453

Title: Investigation of wire-array Z-pinches by laser probing diagnostics

Journal Article · Thu Jan 17 00:00:00 EST 2019 · Matter and Radiation at Extremes

DOI:https://doi.org/10.1063/1.5081453· OSTI ID:1642474

Ivanov, V. V. ^[1]; Anderson, A. A. ^[1]; Papp, D. ^[2]

Univ. of Nevada, Reno, NV (United States)
ELI-ALPS, ELI-HU Nkft., Szeged (Hungary)

Laser diagnostics provides powerful tools for the investigation of dense Z-pinches. In this paper, wire-array Z-pinches are investigated at the 1 MA Zebra generator using laser diagnostics at different wavelengths coupled with x-ray diagnostics. Plasma dynamics during the ablation, implosion, and stagnation stages are observed by multiframe diagnostics. Cascading and nonprecursor implosions are studied in wire arrays. Ultraviolet diagnostics allows deep penetration into the Z-pinch plasma at stagnation. End-on probing reveals the complicated structure of the precursor. Strong magnetohydrodynamic instabilities are found in a dense pinch hidden in the trailing plasma. Small-scale instabilities are seen in the Z-pinch plasma with micrometer resolution. Probing of the pinch from four directions shows asymmetrical trailing plasma in some configurations of wire arrays. Faraday rotation diagnostics reveals the magnetic fields and the current distribution in the plasma of the precursor and Z-pinch.Redistribution of current in the trailing plasma is seen during kink and sausage instabilities in the stagnation stage. The formation of micropinches and hot spots in the Z-pinch is analyzed with coupled laser and x-ray diagnostics. Different laser diagnostics allow the study of Z-pinch plasmas in all stages, including fast dynamics and instabilities.

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Research Organization:: Univ. of Nevada, Reno, NV (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: SC0016500; NA0002075

OSTI ID:: 1642474

Journal Information:: Matter and Radiation at Extremes, Vol. 4, Issue 1; ISSN 2468-2047

Publisher:: China Academy of Engineering Physics (CAEP)/AIP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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Editorial for special issue on Z-pinches Lebedev, Sergey; Spielman, R. B.; Li, Xingwen Matter and Radiation at Extremes, Vol. 4, Issue 6 https://doi.org/10.1063/1.5121890	journal	November 2019
Application of quantum-statistical methods to studies of thermodynamic and radiative processes in hot dense plasmas Orlov, Nikolay Yu.; Kadatskiy, Maxim A.; Denisov, Oleg B. Matter and Radiation at Extremes, Vol. 4, Issue 5 https://doi.org/10.1063/1.5096439	journal	September 2019

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