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

Loebner, Keith T. K.; Underwood, Thomas C.; Mouratidis, Theodore; Cappelli, Mark. A.

doi:10.1063/1.4943370

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

Abstract

Here, 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. ^[1];

^[1]; Mouratidis, Theodore ^[1]; Cappelli, Mark. A. ^[1]

Stanford Univ., Stanford, CA (United States)

Publication Date:: Mon Feb 29 00:00:00 EST 2016

Research Org.:: Stanford Univ., CA (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1470320

Alternate Identifier(s):: OSTI ID: 1240202

Grant/Contract Number:: NA0002011

Resource Type:: Accepted Manuscript

Journal Name:: Applied Physics Letters

Additional Journal Information:: Journal Volume: 108; Journal Issue: 9; Journal ID: ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

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.  https://doi.org/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.  https://doi.org/10.1063/1.4943370.  https://www.osti.gov/servlets/purl/1470320.

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@article{osti_1470320,

  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 = {Here, 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},

  number       = 9,

  volume       = 108,

  place        = {United States},

  year         = {Mon Feb 29 00:00:00 EST 2016},

  month        = {Mon Feb 29 00:00:00 EST 2016}

}

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

Abstract

Citation Formats

A fast rise-rate, adjustable-mass-bit gas puff valve for energetic pulsed plasma experiments journal, June 2015

Numerical Methods for Reducing Line and Surface Probe Data journal, July 1960

Plasma deflagration and the properties of a coaxial plasma deflagration gun journal, September 1970

A contoured gap coaxial plasma gun with injected plasma armature journal, August 2009

High-Velocity Neutral Plasma Jet Formed by Dense Plasma Deflagration journal, October 2014

A study of a coaxial plasma gun journal, February 1995

Current distribution measurements inside an electromagnetic plasma gun operated in a gas-puff mode journal, December 2010

Performance of a coaxial plasma gun journal, January 1966

Diagnostics and analysis of incident and vapor shield plasmas in PLADIS I, a coaxial deflagration gun for tokamak disruption simulation journal, January 1999

Evidence of Branching Phenomena in Current-Driven Ionization Waves journal, October 2015

Application of powerful quasi-steady-state plasma accelerators for simulation of ITER transient heat loads on divertor surfaces journal, March 2007

Estimates of confinement time and energy gain for plasma liner driven magnetoinertial fusion using an analytic self-similar converging shock model journal, November 2009

Sheared Flow Stabilization of the m = 1 Kink Mode in Z Pinches journal, October 1995

N-Wave Propagating into a Stratified Atmosphere journal, January 1960

Evidence of Stabilization in the Z -Pinch journal, October 2001

Formation of a sheared flow Z pinch journal, June 2005

Cinematic of the current sheet in a pulsed coaxial plasma source operated with uniform gas filling journal, July 2001

Experimental investigation of plasma-broadened hydrogen Balmer lines at low electron densities journal, January 1980

Observation of current sheath transition from snowplow to deflagration journal, February 1985

Puff‐gas coaxial‐injected electromagnetic coaxial plasma gun journal, April 1987

Two-dimensional axisymmetric magnetohydrodynamic analysis of blow-by in a coaxial plasma accelerator journal, May 2006

Application of a deflagration plasma gun as a space propulsion thruster journal, September 1971

Simulating Astrophysical Jets in Laboratory Experiments journal, July 2005

Sheared flow stabilization experiments in the ZaP flow Z pinch journal, May 2003

Schlieren diagnostic for cinematic visualization of dense plasma jets at Alfvénic timescales journal, December 2019

Dynamic formation of stable current-driven plasma jets journal, February 2019

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Researches on preconditioned wire array Z pinches in Xi’an Jiaotong University journal, May 2019

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A fast rise-rate, adjustable-mass-bit gas puff valve for energetic pulsed plasma experiments
journal, June 2015

Numerical Methods for Reducing Line and Surface Probe Data
journal, July 1960

Plasma deflagration and the properties of a coaxial plasma deflagration gun
journal, September 1970

A contoured gap coaxial plasma gun with injected plasma armature
journal, August 2009

High-Velocity Neutral Plasma Jet Formed by Dense Plasma Deflagration
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A study of a coaxial plasma gun
journal, February 1995

Current distribution measurements inside an electromagnetic plasma gun operated in a gas-puff mode
journal, December 2010

Performance of a coaxial plasma gun
journal, January 1966

Diagnostics and analysis of incident and vapor shield plasmas in PLADIS I, a coaxial deflagration gun for tokamak disruption simulation
journal, January 1999

Evidence of Branching Phenomena in Current-Driven Ionization Waves
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Application of powerful quasi-steady-state plasma accelerators for simulation of ITER transient heat loads on divertor surfaces
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Estimates of confinement time and energy gain for plasma liner driven magnetoinertial fusion using an analytic self-similar converging shock model
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Sheared Flow Stabilization of the $m = 1$ Kink Mode in $Z$ Pinches
journal, October 1995

N-Wave Propagating into a Stratified Atmosphere
journal, January 1960

Evidence of Stabilization in the $Z$ -Pinch
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Formation of a sheared flow Z pinch
journal, June 2005

Cinematic of the current sheet in a pulsed coaxial plasma source operated with uniform gas filling
journal, July 2001

Experimental investigation of plasma-broadened hydrogen Balmer lines at low electron densities
journal, January 1980

Observation of current sheath transition from snowplow to deflagration
journal, February 1985

Puff‐gas coaxial‐injected electromagnetic coaxial plasma gun
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Two-dimensional axisymmetric magnetohydrodynamic analysis of blow-by in a coaxial plasma accelerator
journal, May 2006

Application of a deflagration plasma gun as a space propulsion thruster
journal, September 1971

Simulating Astrophysical Jets in Laboratory Experiments
journal, July 2005

Sheared flow stabilization experiments in the ZaP flow Z pinch
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Schlieren diagnostic for cinematic visualization of dense plasma jets at Alfvénic timescales
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Dynamic formation of stable current-driven plasma jets
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Researches on preconditioned wire array Z pinches in Xi’an Jiaotong University
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