Characterization of electrostatic shock in laser-produced optically-thin plasma flows using optical diagnostics

T. Morita; Y. Sakawa; Y. Kuramitsu; S. Dono; H. Aoki; H. Tanji; J. N. Waugh; C. D. Gregory; M. Koenig; N. C. Woolsey; H. Takabe

doi:10.1063/1.4990058

Characterization of electrostatic shock in laser-produced optically-thin plasma flows using optical diagnostics

T. Morita^*, Y. Sakawa, Y. Kuramitsu, S. Dono, H. Aoki, H. Tanji, J. N. Waugh, C. D. Gregory, M. Koenig, N. C. Woolsey, H. Takabe

^*Corresponding author for this work

Physics

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Abstract

We present a method for evaluating the properties of electrostatic shock in laser-produced plasmas by using optical diagnostics. A shock is formed by a collimated jet in counter-streaming plasmas in nearly collisionless condition, showing the steepening of the transition width in time. In the present experiment, a streaked optical pyrometry was applied to evaluate the electron density and temperatures in the upstream and downstream regions of the shock so that the shock conditions are satisfied, by assuming thermal bremsstrahlung emission in optically thin plasmas. The derived electron densities are nearly consistent with those estimated from interferometry.

Original language	English
Article number	072701
Pages (from-to)	1-8
Number of pages	8
Journal	Physics of Plasmas
Volume	24
Issue number	7
Early online date	27 Jun 2017
DOIs	https://doi.org/10.1063/1.4990058
Publication status	E-pub ahead of print - 27 Jun 2017

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© 2017 AIP Publishing.This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

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© 2017 AIP Publishing.This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.
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Morita, T., Sakawa, Y., Kuramitsu, Y., Dono, S., Aoki, H., Tanji, H., Waugh, J. N., Gregory, C. D., Koenig, M., Woolsey, N. C., & Takabe, H. (2017). Characterization of electrostatic shock in laser-produced optically-thin plasma flows using optical diagnostics. Physics of Plasmas, 24(7), 1-8. Article 072701. Advance online publication. https://doi.org/10.1063/1.4990058

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abstract = "We present a method for evaluating the properties of electrostatic shock in laser-produced plasmas by using optical diagnostics. A shock is formed by a collimated jet in counter-streaming plasmas in nearly collisionless condition, showing the steepening of the transition width in time. In the present experiment, a streaked optical pyrometry was applied to evaluate the electron density and temperatures in the upstream and downstream regions of the shock so that the shock conditions are satisfied, by assuming thermal bremsstrahlung emission in optically thin plasmas. The derived electron densities are nearly consistent with those estimated from interferometry.",

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AU - Morita, T.

AU - Sakawa, Y.

AU - Kuramitsu, Y.

AU - Dono, S.

AU - Aoki, H.

AU - Tanji, H.

AU - Waugh, J. N.

AU - Gregory, C. D.

AU - Koenig, M.

AU - Woolsey, N. C.

AU - Takabe, H.

N1 - © 2017 AIP Publishing.This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.

PY - 2017/6/27

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N2 - We present a method for evaluating the properties of electrostatic shock in laser-produced plasmas by using optical diagnostics. A shock is formed by a collimated jet in counter-streaming plasmas in nearly collisionless condition, showing the steepening of the transition width in time. In the present experiment, a streaked optical pyrometry was applied to evaluate the electron density and temperatures in the upstream and downstream regions of the shock so that the shock conditions are satisfied, by assuming thermal bremsstrahlung emission in optically thin plasmas. The derived electron densities are nearly consistent with those estimated from interferometry.

AB - We present a method for evaluating the properties of electrostatic shock in laser-produced plasmas by using optical diagnostics. A shock is formed by a collimated jet in counter-streaming plasmas in nearly collisionless condition, showing the steepening of the transition width in time. In the present experiment, a streaked optical pyrometry was applied to evaluate the electron density and temperatures in the upstream and downstream regions of the shock so that the shock conditions are satisfied, by assuming thermal bremsstrahlung emission in optically thin plasmas. The derived electron densities are nearly consistent with those estimated from interferometry.

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Characterization of electrostatic shock in laser-produced optically-thin plasma flows using optical diagnostics

Abstract

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