Radial magnetic compression in the expelled jet of a plasma deflagration accelerator

doi:10.1063/1.4943370

Title: Radial magnetic compression in the expelled jet of a plasma deflagration accelerator

Abstract

A spectroscopic study of a pulsed plasma deflagration accelerator is carried out that confirms the existence of a strong compression in the emerging jet at the exit plane of the device. An imaging spectrometer is used to collect broadened Hα emission from a transaxial slice of the emerging jet at high spatial resolution, and the radial plasma density profile is computed from Voigt fits of the Abel inverted emissivity profiles. The plasma temperature, determined via Doppler broadening of impurity line emission, is compared against the temperature predictions of a radial magnetohydrodynamic equilibrium model applied to the measured density profiles. Empirical scaling laws developed for the plasma density, combined with the measured and predicted temperatures, indicate that a radially equilibrated Z-pinch is formed within the expelled plasma jet at the exit plane during the deflagration process.

Authors:

Loebner, Keith T. K.,; Underwood, Thomas C.; Mouratidis, Theodore; Cappelli, Mark A. ^[1]

High Temperature Gasdynamics Laboratory, Stanford University, Stanford, California 94305 (United States)

Publication Date:: 2016-02-29

OSTI Identifier:: 22591773

Resource Type:: Journal Article

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 108; Journal Issue: 9; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DOPPLER BROADENING; ELECTRON TEMPERATURE; EMISSIVITY; IMPURITIES; ION TEMPERATURE; MAGNETIC COMPRESSION; PLASMA DENSITY; PLASMA JETS; PULSES; SCALING LAWS; SPATIAL RESOLUTION; SPECTROMETERS

Citation Formats


                    Loebner, Keith T. K.,, Underwood, Thomas C., Mouratidis, Theodore, and Cappelli, Mark A. Radial magnetic compression in the expelled jet of a plasma deflagration accelerator.  United States: N. p., 2016. 
        Web.  doi:10.1063/1.4943370.

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                    Loebner, Keith T. K.,, Underwood, Thomas C., Mouratidis, Theodore, & Cappelli, Mark A. Radial magnetic compression in the expelled jet of a plasma deflagration accelerator.  United States.  doi:10.1063/1.4943370.

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                    Loebner, Keith T. K.,, Underwood, Thomas C., Mouratidis, Theodore, and Cappelli, Mark A. Mon .  
        "Radial magnetic compression in the expelled jet of a plasma deflagration accelerator".  United States.  doi:10.1063/1.4943370.

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@article{osti_22591773,

  title        = {Radial magnetic compression in the expelled jet of a plasma deflagration accelerator},

  author       = {Loebner, Keith T. K., and Underwood, Thomas C. and Mouratidis, Theodore and Cappelli, Mark A.},

  abstractNote = {A spectroscopic study of a pulsed plasma deflagration accelerator is carried out that confirms the existence of a strong compression in the emerging jet at the exit plane of the device. An imaging spectrometer is used to collect broadened Hα emission from a transaxial slice of the emerging jet at high spatial resolution, and the radial plasma density profile is computed from Voigt fits of the Abel inverted emissivity profiles. The plasma temperature, determined via Doppler broadening of impurity line emission, is compared against the temperature predictions of a radial magnetohydrodynamic equilibrium model applied to the measured density profiles. Empirical scaling laws developed for the plasma density, combined with the measured and predicted temperatures, indicate that a radially equilibrated Z-pinch is formed within the expelled plasma jet at the exit plane during the deflagration process.},

  doi          = {10.1063/1.4943370},

  journal      = {Applied Physics Letters},

  issn         = {0003-6951},

  number       = 9,

  volume       = 108,

  place        = {United States},

  year         = {2016},

  month        = {2}

}

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Journal Article:

DOI: 10.1063/1.4943370

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Works referencing / citing this record:

Progress Toward a Compact Fusion Reactor Using the Sheared-Flow-Stabilized Z-Pinch
journal, July 2019

Forbes, Eleanor G.; Shumlak, Uri; McLean, Harry S.
Fusion Science and Technology, Vol. 75, Issue 7
DOI: 10.1080/15361055.2019.1622971

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