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

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4943370· OSTI ID:1470320

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.

Research Organization:
Stanford Univ., CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0002011
OSTI ID:
1470320
Alternate ID(s):
OSTI ID: 1240202
Journal Information:
Applied Physics Letters, Vol. 108, Issue 9; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 21 works
Citation information provided by
Web of Science

References (24)

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

Cited By (11)

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
Magnetohydrodynamic simulation study of plasma jets and plasma-surface contact in coaxial plasma accelerators journal June 2017
Laser-produced gaseous plasmonic resonators journal November 2018
Researches on preconditioned wire array Z pinches in Xi’an Jiaotong University journal May 2019
Progress Toward a Compact Fusion Reactor Using the Sheared-Flow-Stabilized Z-Pinch journal July 2019
Modeling of thermalization phenomena in coaxial plasma accelerators journal April 2018
Preconditioned wire array Z-pinches driven by a double pulse current generator journal June 2018
Computational and experimental investigation of plasma deflagration jets and detonation shocks in coaxial plasma accelerators journal February 2018
Sustained Neutron Production from a Sheared-Flow Stabilized Z Pinch journal April 2019
Magnetohydrodynamic simulation study of plasma jets and plasma-surface contact in coaxial plasma accelerators conference January 2018