skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Fast discharge in a spherical cavity

Abstract

The work is devoted to the study of the plasma, created by a fast discharge in a spherical cavity. The discharge was driven by an inductive storage with plasma erosion opening switch (dI/dt ∼10{sup 12} A/s). The plasma was produced in a spherical cavity (alumina, 11 mm diameter). Xe, Ar, and He at the pressure 80 Pa were used as working gases. The time evolution of the spatial structure and of extreme ultraviolet (EUV) spectra of the discharge plasma was studied by means of micro channel plate detector. The discharges with Xe and Ar resulted in the stable appearance of the spherically shaped plasma with the diameter about 1–3 mm. The plasma emission in the EUV region lasts ∼500 ns. The EUV spectrum of Ar discharge at the moment of maximum of the electron temperature T{sub e} contains the lines of Ar X (ionization potential 478.7 eV), that indicates a value of T{sub e} in the range 50–100 eV. The mechanism of plasma appearance can be the cumulation of the convergent spherical shock wave, generated by fast heat deposition and magnetic pressure in working media near the inner surface of the discharge volume.

Authors:
 [1]
  1. Establishment of the Russian Academy of Sciences, Institute for Spectroscopy RAS, Fizicheskaya Str., 5, Troitsk, Moscow 142190 (Russian Federation)
Publication Date:
OSTI Identifier:
22253052
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 21; Journal Issue: 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ELECTRON TEMPERATURE; EXTREME ULTRAVIOLET RADIATION; IONIZATION POTENTIAL; MICROCHANNEL ELECTRON MULTIPLIERS; PLASMA; PLASMA SWITCHES; SHOCK WAVES; SPHERICAL CONFIGURATION

Citation Formats

Antsiferov, P. S., E-mail: Ants@isan.troitsk.ru, and Dorokhin, L. A. Fast discharge in a spherical cavity. United States: N. p., 2014. Web. doi:10.1063/1.4873402.
Antsiferov, P. S., E-mail: Ants@isan.troitsk.ru, & Dorokhin, L. A. Fast discharge in a spherical cavity. United States. https://doi.org/10.1063/1.4873402
Antsiferov, P. S., E-mail: Ants@isan.troitsk.ru, and Dorokhin, L. A. 2014. "Fast discharge in a spherical cavity". United States. https://doi.org/10.1063/1.4873402.
@article{osti_22253052,
title = {Fast discharge in a spherical cavity},
author = {Antsiferov, P. S., E-mail: Ants@isan.troitsk.ru and Dorokhin, L. A.},
abstractNote = {The work is devoted to the study of the plasma, created by a fast discharge in a spherical cavity. The discharge was driven by an inductive storage with plasma erosion opening switch (dI/dt ∼10{sup 12} A/s). The plasma was produced in a spherical cavity (alumina, 11 mm diameter). Xe, Ar, and He at the pressure 80 Pa were used as working gases. The time evolution of the spatial structure and of extreme ultraviolet (EUV) spectra of the discharge plasma was studied by means of micro channel plate detector. The discharges with Xe and Ar resulted in the stable appearance of the spherically shaped plasma with the diameter about 1–3 mm. The plasma emission in the EUV region lasts ∼500 ns. The EUV spectrum of Ar discharge at the moment of maximum of the electron temperature T{sub e} contains the lines of Ar X (ionization potential 478.7 eV), that indicates a value of T{sub e} in the range 50–100 eV. The mechanism of plasma appearance can be the cumulation of the convergent spherical shock wave, generated by fast heat deposition and magnetic pressure in working media near the inner surface of the discharge volume.},
doi = {10.1063/1.4873402},
url = {https://www.osti.gov/biblio/22253052}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 4,
volume = 21,
place = {United States},
year = {Tue Apr 15 00:00:00 EDT 2014},
month = {Tue Apr 15 00:00:00 EDT 2014}
}