Study of Implosion of Combined Nested Arrays

Journal Article · Fri Dec 15 04:00:00 EST 2017 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X17120042· OSTI ID:22760274

Aleksandrov, V. V.; Grabovski, E. V.; Sasorov, P. V.; Branitsky, A. V.; Gritsuk, A. N.; Frolov, I. N.; Laukhin, Ya. N. ^[1]

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1. Troitsk Institute for Innovation and Fusion Research (Russian Federation)

New experimental data on the implosion of plasma of nested kapron−tungsten arrays are obtained at the Angara-5-1 facility. The mode of plasma implosion is implemented in which a shock wave region forms in the space between the inner and outer arrays where a transition from the super-Alfvénic (V{sub r} > V{sub A}) to sub-Alfvénic (V{sub r} < V{sub A}) plasma flow takes place. Specific features of the formation and decay of the shock region are studied using laser shadow imaging and X-ray frame photography. The plasma density in the transition region is estimated. By comparing the experimental data with the results of simulations of quasi-steady implosion of a nested array with allowance for extended plasma production, the physical conditions are determined at which the implosion mode with the formation the shock region takes place. Stable compression of the plasma of the inner array was observed during the implosion of combined nested arrays with a fiber outer array and tungsten inner array. Suppression of magnetic Rayleigh-Taylor instability during the compression of the inner array plasma results in the formation of a compact radiating Z-pinch and generation of a soft X-ray pulse with a peak power of 4 TW and duration of about 5 ns.

• OSTI ID: 22760274
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 12 Vol. 43; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ANGARA-5 DEVICE
IMPLOSIONS
PEAK LOAD
PLASMA DENSITY
PLASMA PRODUCTION
RAYLEIGH-TAYLOR INSTABILITY
SHOCK WAVES
SOFT X RADIATION
TUNGSTEN