Measuring the compression velocity of a Z pinch in an axial magnetic field

A. G. Rousskikh, A. S. Zhigalin, V. I. Oreshkin, R. B. Baksht

Division for Control and Diagnostics

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Abstract

This paper presents the results of measuring the velocity of the plasma boundary during the compression of a metallic gas-puff Z pinch in an axial magnetic field. The experiment was conducted on the IMRI-5 facility (current pulse of 450-kA amplitude with a 450-ns rise time); the initial magnetic field B_z ₀ was varied in the range of 0.15-0.6 T. To measure the compression velocity, B-dot probes were used successfully. The data obtained with the B-dot probes agree with the results obtained by other methods [visible imaging and determination of the pinch radius as a function of the time-varying pinch inductance L(t)]. It is shown that the plasma compression velocity is (1-1.5) × 10⁷ cm/s at B_z ₀ = 0 and 0.6 × 10⁷ cm/s at B_z ₀ = 0.6 T.

Original language	English
Article number	063519
Journal	Physics of Plasmas
Volume	24
Issue number	6
DOIs	https://doi.org/10.1063/1.4986096
Publication status	Published - 1 Jun 2017

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ASJC Scopus subject areas

Condensed Matter Physics

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Rousskikh, A. G., Zhigalin, A. S., Oreshkin, V. I., & Baksht, R. B. (2017). Measuring the compression velocity of a Z pinch in an axial magnetic field. Physics of Plasmas, 24(6), [063519]. https://doi.org/10.1063/1.4986096

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AU - Oreshkin, V. I.

AU - Baksht, R. B.

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AB - This paper presents the results of measuring the velocity of the plasma boundary during the compression of a metallic gas-puff Z pinch in an axial magnetic field. The experiment was conducted on the IMRI-5 facility (current pulse of 450-kA amplitude with a 450-ns rise time); the initial magnetic field Bz 0 was varied in the range of 0.15-0.6 T. To measure the compression velocity, B-dot probes were used successfully. The data obtained with the B-dot probes agree with the results obtained by other methods [visible imaging and determination of the pinch radius as a function of the time-varying pinch inductance L(t)]. It is shown that the plasma compression velocity is (1-1.5) × 107 cm/s at Bz 0 = 0 and 0.6 × 107 cm/s at Bz 0 = 0.6 T.

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10.1063/1.4986096