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Title: Effect of insulator sleeve material on the x-ray emission from a plasma focus device

Abstract

The effect of insulator sleeve material on x-ray emission from a 2.3 kJ Mather type plasma focus device operated in argon-hydrogen mixture is investigated. The time and space resolved x-ray emission characteristics are studied by using a three channel p-i-n diode x-ray spectrometer and a multipinhole camera. The x-ray emission depends on the volumetric ratio of argon-hydrogen mixture as well as the filling pressure and the highest x-ray emission is observed for a volumetric ratio 40% Ar to 60%H{sub 2} at 2.5 mbar filling pressure. The fused silica insulator sleeve produces the highest x-ray emission whereas nonceramic insulator sleeves such as nylon, Perspex, or Teflon does not produce focus or x-rays. The pinhole images of the x-ray emitting zones reveal that the contribution of the Cu K{alpha} line is weak and plasma x-rays are intense. The highest plasma electron temperature is estimated to be 3.3 and 3.6 keV for Pyrex glass and fused silica insulator sleeves, respectively. It is speculated that the higher surface resistivity of fused silica is responsible for enhanced x-ray emission and plasma electron temperature.

Authors:
;  [1]; ;  [2]
  1. Department of Physics, University of Sargodha, Sargodha 40100 (Pakistan)
  2. Department of Physics, Quaid-i-Azam University, Islamabad 45320 (Pakistan)
Publication Date:
OSTI Identifier:
21432284
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 17; Journal Issue: 9; Other Information: DOI: 10.1063/1.3484875; (c) 2010 American Institute of Physics; Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ARGON; ELECTRON TEMPERATURE; EMISSION; HYDROGEN; MIXTURES; NYLON; PERSPEX; PLASMA DIAGNOSTICS; PLASMA FOCUS DEVICES; PYREX; SILICA; TEFLON; X RADIATION; X-RAY SPECTROMETERS; BOROSILICATE GLASS; DISPERSIONS; ELECTROMAGNETIC RADIATION; ELEMENTS; ESTERS; FLUIDS; FLUORINATED ALIPHATIC HYDROCARBONS; GASES; GLASS; HALOGENATED ALIPHATIC HYDROCARBONS; IONIZING RADIATIONS; MATERIALS; MEASURING INSTRUMENTS; MINERALS; NONMETALS; OPEN PLASMA DEVICES; ORGANIC COMPOUNDS; ORGANIC FLUORINE COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; ORGANIC POLYMERS; OXIDE MINERALS; PETROCHEMICALS; PETROLEUM PRODUCTS; PLASTICS; POLYACRYLATES; POLYAMIDES; POLYETHYLENES; POLYMERS; POLYOLEFINS; POLYTETRAFLUOROETHYLENE; POLYVINYLS; RADIATIONS; RARE GASES; SPECTROMETERS; SYNTHETIC MATERIALS; THERMONUCLEAR DEVICES

Citation Formats

Hussain, S, Badar, M A, Shafiq, M, and Zakaullah, M. Effect of insulator sleeve material on the x-ray emission from a plasma focus device. United States: N. p., 2010. Web. doi:10.1063/1.3484875.
Hussain, S, Badar, M A, Shafiq, M, & Zakaullah, M. Effect of insulator sleeve material on the x-ray emission from a plasma focus device. United States. https://doi.org/10.1063/1.3484875
Hussain, S, Badar, M A, Shafiq, M, and Zakaullah, M. 2010. "Effect of insulator sleeve material on the x-ray emission from a plasma focus device". United States. https://doi.org/10.1063/1.3484875.
@article{osti_21432284,
title = {Effect of insulator sleeve material on the x-ray emission from a plasma focus device},
author = {Hussain, S and Badar, M A and Shafiq, M and Zakaullah, M},
abstractNote = {The effect of insulator sleeve material on x-ray emission from a 2.3 kJ Mather type plasma focus device operated in argon-hydrogen mixture is investigated. The time and space resolved x-ray emission characteristics are studied by using a three channel p-i-n diode x-ray spectrometer and a multipinhole camera. The x-ray emission depends on the volumetric ratio of argon-hydrogen mixture as well as the filling pressure and the highest x-ray emission is observed for a volumetric ratio 40% Ar to 60%H{sub 2} at 2.5 mbar filling pressure. The fused silica insulator sleeve produces the highest x-ray emission whereas nonceramic insulator sleeves such as nylon, Perspex, or Teflon does not produce focus or x-rays. The pinhole images of the x-ray emitting zones reveal that the contribution of the Cu K{alpha} line is weak and plasma x-rays are intense. The highest plasma electron temperature is estimated to be 3.3 and 3.6 keV for Pyrex glass and fused silica insulator sleeves, respectively. It is speculated that the higher surface resistivity of fused silica is responsible for enhanced x-ray emission and plasma electron temperature.},
doi = {10.1063/1.3484875},
url = {https://www.osti.gov/biblio/21432284}, journal = {Physics of Plasmas},
issn = {1070-664X},
number = 9,
volume = 17,
place = {United States},
year = {Wed Sep 15 00:00:00 EDT 2010},
month = {Wed Sep 15 00:00:00 EDT 2010}
}