Transonic plasma flow passing through a magnetic mirror

M. Inutake; A. Ando; K. Hattori; H. Tobari; T. Makita; H. Isobe

doi:10.13182/fst07-a1335

Transonic plasma flow passing through a magnetic mirror

M. Inutake, A. Ando, K. Hattori, H. Tobari, T. Makita, H. Isobe

ENG - Electrical Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Dynamics of a fast-flowing plasma through a magnetic mirror field was investigated. A highly-ionized, high-density, He plasma produced by a quasi-steady MPD arcjet (MPDA) was injected into a magnetic mirror. In a uniform magnetic field region, ion acoustic Mach number (M_i) was almost unity, while in a diverging field region the Mach number increased up to 2-3. When the supersonic plasma flows into a converging field region, a shock-like structure was formed. The subsonic flow downstream of the shock was re-accelerated up to M_i of 2-3. The sonic condition (M_i=1) is satisfied at the magnetic mirror throat as in a conventional Laval nozzle. The adiabatic exponent of ions was evaluated by comparing measured spatial profiles with the prediction from ID isentropic model.

Original language	English
Pages (from-to)	141-146
Number of pages	6
Journal	Fusion Science and Technology
Volume	51
Issue number	2 T.
DOIs	https://doi.org/10.13182/fst07-a1335
Publication status	Published - 2007 Feb

ASJC Scopus subject areas

Civil and Structural Engineering
Nuclear and High Energy Physics
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

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title = "Transonic plasma flow passing through a magnetic mirror",

abstract = "Dynamics of a fast-flowing plasma through a magnetic mirror field was investigated. A highly-ionized, high-density, He plasma produced by a quasi-steady MPD arcjet (MPDA) was injected into a magnetic mirror. In a uniform magnetic field region, ion acoustic Mach number (Mi) was almost unity, while in a diverging field region the Mach number increased up to 2-3. When the supersonic plasma flows into a converging field region, a shock-like structure was formed. The subsonic flow downstream of the shock was re-accelerated up to Mi of 2-3. The sonic condition (Mi=1) is satisfied at the magnetic mirror throat as in a conventional Laval nozzle. The adiabatic exponent of ions was evaluated by comparing measured spatial profiles with the prediction from ID isentropic model.",

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T1 - Transonic plasma flow passing through a magnetic mirror

AU - Inutake, M.

AU - Ando, A.

AU - Hattori, K.

AU - Tobari, H.

AU - Makita, T.

AU - Isobe, H.

PY - 2007/2

Y1 - 2007/2

N2 - Dynamics of a fast-flowing plasma through a magnetic mirror field was investigated. A highly-ionized, high-density, He plasma produced by a quasi-steady MPD arcjet (MPDA) was injected into a magnetic mirror. In a uniform magnetic field region, ion acoustic Mach number (Mi) was almost unity, while in a diverging field region the Mach number increased up to 2-3. When the supersonic plasma flows into a converging field region, a shock-like structure was formed. The subsonic flow downstream of the shock was re-accelerated up to Mi of 2-3. The sonic condition (Mi=1) is satisfied at the magnetic mirror throat as in a conventional Laval nozzle. The adiabatic exponent of ions was evaluated by comparing measured spatial profiles with the prediction from ID isentropic model.

AB - Dynamics of a fast-flowing plasma through a magnetic mirror field was investigated. A highly-ionized, high-density, He plasma produced by a quasi-steady MPD arcjet (MPDA) was injected into a magnetic mirror. In a uniform magnetic field region, ion acoustic Mach number (Mi) was almost unity, while in a diverging field region the Mach number increased up to 2-3. When the supersonic plasma flows into a converging field region, a shock-like structure was formed. The subsonic flow downstream of the shock was re-accelerated up to Mi of 2-3. The sonic condition (Mi=1) is satisfied at the magnetic mirror throat as in a conventional Laval nozzle. The adiabatic exponent of ions was evaluated by comparing measured spatial profiles with the prediction from ID isentropic model.

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JO - Fusion Science and Technology

JF - Fusion Science and Technology

SN - 1536-1055

IS - 2 T.

ER -

Transonic plasma flow passing through a magnetic mirror

Abstract

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