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Title: Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode

Abstract

Thermal plasma expansion is characterised during the operation of a high power diode with an explosive emission carbon-fiber-aluminum cathode driven by a 250 kV, 150 ns accelerating pulse. It is found that a quasi-stationary state of plasma expansion is obtained during the main part of the accelerating pulse and the whole plasma expansion exhibits an “U”-shape velocity evolution. A theoretical model describing the dynamics of plasma expansion is developed, which indicates that the plasma expansion velocity is determined by equilibrium between the diode current density and plasma thermal electron current density.

Authors:
;  [1]
  1. College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073 (China)
Publication Date:
OSTI Identifier:
22300057
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 104; Journal Issue: 23; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM; CARBON FIBERS; CATHODES; CURRENT DENSITY; ELECTRONS; EMISSION; EQUILIBRIUM; EVOLUTION; EXPLOSIVES; PLASMA; PLASMA EXPANSION; PULSES

Citation Formats

Ju, J.-C., E-mail: jujinchuan@126.com, Laboratoire de Physique des Gaz et des Plasmas, CNRS-Université Paris-Sud, Orsay 91405, Liu, L., and Cai, D. Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode. United States: N. p., 2014. Web. doi:10.1063/1.4882162.
Ju, J.-C., E-mail: jujinchuan@126.com, Laboratoire de Physique des Gaz et des Plasmas, CNRS-Université Paris-Sud, Orsay 91405, Liu, L., & Cai, D. Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode. United States. https://doi.org/10.1063/1.4882162
Ju, J.-C., E-mail: jujinchuan@126.com, Laboratoire de Physique des Gaz et des Plasmas, CNRS-Université Paris-Sud, Orsay 91405, Liu, L., and Cai, D. 2014. "Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode". United States. https://doi.org/10.1063/1.4882162.
@article{osti_22300057,
title = {Characterization of plasma expansion dynamics in a high power diode with a carbon-fiber-aluminum cathode},
author = {Ju, J.-C., E-mail: jujinchuan@126.com and Laboratoire de Physique des Gaz et des Plasmas, CNRS-Université Paris-Sud, Orsay 91405 and Liu, L. and Cai, D.},
abstractNote = {Thermal plasma expansion is characterised during the operation of a high power diode with an explosive emission carbon-fiber-aluminum cathode driven by a 250 kV, 150 ns accelerating pulse. It is found that a quasi-stationary state of plasma expansion is obtained during the main part of the accelerating pulse and the whole plasma expansion exhibits an “U”-shape velocity evolution. A theoretical model describing the dynamics of plasma expansion is developed, which indicates that the plasma expansion velocity is determined by equilibrium between the diode current density and plasma thermal electron current density.},
doi = {10.1063/1.4882162},
url = {https://www.osti.gov/biblio/22300057}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 23,
volume = 104,
place = {United States},
year = {Mon Jun 09 00:00:00 EDT 2014},
month = {Mon Jun 09 00:00:00 EDT 2014}
}