Enhanced window breakdown dynamics in a nanosecond microwave tail pulse

Journal Article · Mon Jun 23 00:00:00 EDT 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4885398· OSTI ID:22303875

Chang, Chao ^[1]; Zhu, Meng; Li, Shuang; Xie, Jialing; Yan, Kai; Luo, Tongding; Zhu, Xiaoxin ^[1]; Verboncoeur, John ^[2]

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1. Laboratory on Science and Technology of High Power Microwave, Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China)
2. Department of Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan 48824 (United States)

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.

• OSTI ID: 22303875
• Journal Information: Applied Physics Letters, Vol. 104, Issue 25; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

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