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Title: Enhanced window breakdown dynamics in a nanosecond microwave tail pulse

The mechanisms of nanosecond microwave-driven discharges near a dielectric/vacuum interface were studied by measuring the time- and space-dependent optical emissions and pulse waveforms. The experimental observations indicate multipactor and plasma developing in a thin layer of several millimeters above interface. The emission brightness increases significantly after main pulse, but emission region widens little. The mechanisms are studied by analysis and simulation, revealing intense ionization concentrated in a desorbed high-pressure layer, leading to a bright light layer above surface; the lower-voltage tail after main pulse contributes to heat electron energy tails closer to excitation cross section peaks, resulting in brighter emission.
Authors:
 [1] ;  [2] ;  [2] ; ; ; ; ; ;  [1] ;  [3]
  1. Laboratory on Science and Technology of High Power Microwave, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China)
  2. (China)
  3. Department of Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan 48824 (United States)
Publication Date:
OSTI Identifier:
22303875
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BREAKDOWN; BRIGHTNESS; CROSS SECTIONS; DIELECTRIC MATERIALS; ELECTRONS; EMISSION; EXCITATION; INTERFACES; IONIZATION; LAYERS; MICROWAVE RADIATION; PLASMA; PULSES; SIMULATION; SPACE DEPENDENCE; SURFACES; THIN FILMS; TIME DEPENDENCE; VISIBLE RADIATION; WAVE FORMS