X-pinch dynamics: Neck formation and implosion

Journal Article · Wed Oct 15 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4900644· OSTI ID:22299691

Oreshkin, V. I. ^[1]; Chaikovsky, S. A. ^[1]; Artyomov, A. P.; Labetskaya, N. A.; Fedunin, A. V.; Rousskikh, A. G.; Zhigalin, A. S. ^[1]

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1. Institute of High Current Electronics, SB, RAS, 2/3 Akademichesky Ave., Tomsk 634055 (Russian Federation)

We propose a model that describes the neck formation and implosion in an X-pinch. The process is simulated to go in two stages. The first stage is neck formation. This stage begins with an electrical explosion of the wires forming the X-pinch, and at the end of the stage, a micropinch (neck) is formed in the region where the wires are crossed. The second stage is neck implosion. The implosion is accompanied by outflow of matter from the neck region, resulting in the formation of a “hot spot”. Analytical estimates obtained in the study under consideration indicate that these stages are approximately equal in duration. Having analyzed the neck implosion dynamics, we have verified a scaling which makes it possible to explain the observed dependences of the time of occurrence of an x-ray pulse on the X-pinch current and mass.

• OSTI ID: 22299691
• Journal Information: Physics of Plasmas, Vol. 21, Issue 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
APPROXIMATIONS
IMPLOSIONS
PLASMA SIMULATION
PULSES
SCALING
X RADIATION