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Title: Temporal response of a surface flashover on a velvet cathode in a relativistic diode

Surface flashover of a carbon fiber velvet cathode generates a discharge from which electrons are relativistically accelerated to γ ranging from 4.9 to 8.8 through a 17.8 cm diode. This discharge is assumed to be a hydrocarbon mixture. The principal objective of these experiments is to quantify the dynamics over the ∼100 ns pulse of the plasma discharge generated on the surface of the velvet cathode and across the anode-cathode (A-K) gap. A qualitative comparison of calculated and measured results is presented, which includes time resolved measurements with a photomultiplier tube and charge-coupled device images. In addition, initial visible spectroscopy measurements will also be presented confirming the ion species are dominated by hydrogen.
Authors:
; ;  [1] ; ;  [2]
  1. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. Voss Scientific, Albuquerque, New Mexico 87108 (United States)
Publication Date:
OSTI Identifier:
22408256
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANODES; CARBON FIBERS; CATHODES; CHARGE-COUPLED DEVICES; COMPARATIVE EVALUATIONS; ELECTRONS; EXPERIMENTAL DATA; FLASHOVER; HYDROCARBONS; HYDROGEN; IMAGES; PLASMA; PULSES; RELATIVISTIC RANGE; SPECTROSCOPY; SURFACES; THEORETICAL DATA; TIME RESOLUTION