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An investigation of plasma-surface interactions on selected conductors and insulators

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Author
Barker, Joseph Henry III
Rush, Robert Jacque
Date
1980-12
Advisor
Schwirzke, Fred R.
Second Reader
Challenger, Kenneth D.
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Abstract
Damage caused by plasma-surface interactions is of concern in fields involving the use of such plasma devices as particle beam weapons, high power lasers and controlled thermonuclear fusion reactors. Several conductors and non-conductors were exposed to a plasma to study the plasma-surface interaction damage. In one part of the study, the plasma was induced by irradiating the surface of the samples with a Q-switched neodymium laser. Some of the samples were irradiated in air, at atmospheric pressure, and in a vacuum, to compare the difference in the extent of the damage on the same types of samples at different pressures. In the other part of the study, several titanium coated conductors and titanium coated non-conductors were exposed to the plasma of a tokamak. Both the metal conductors in the first part of the study, and the titanium coatings in the second part of the study were damaged by unipolar arcing. Nickel showed less evidence of unipolar arcing damage than any of the other samples studies.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
URI
http://hdl.handle.net/10945/17619
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  • 1. Thesis and Dissertation Collection, all items

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    An investigation of unipolar arcing in various conductors and metallic glasses. 

    Hoover, Todd Jeffrey (Monterey, California. Naval Postgraduate School, 1981-09);
    An investigation of unipolar arcing in various conductors and surface preparations was undertaken. A discussion on the production of 'glassy' surfaces on various metals, and their susceptability to unipolar arcing is also ...
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    Unipolar arcing, a basic laser damage mechanism 

    Schwirzke, F. (Monterey, California. Naval Postgraduate School, 1985-05-05); NPS-61-83-008
    Unipolar arcing has been shown to be the primary plasma-surface interaction process when a laser produced plasma is in contact with a surface. Evidence of unipolar arcing was found on all targets irradiated at atmospheric ...
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    Nitrogen Doped Graphene Generated by Microwave Plasma and Reduction Expansion Synthesis 

    Menon, Sarath K.; Luhrs, Claudia C.; Arias-Monje, Pedro J.; Zea, Hugo; Osswald, Sebastian (American Scientific Publishers, 2016);
    This work aimed to produce nitrogen doped graphene from Graphite Oxide (GO) by combining the Expansion Reduction Synthesis (RES) approach, which utilizes urea as doping/reducing agent, with the use of an Atmospheric ...
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