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Title: Abnormal electron-heating mode and formation of secondary-energetic electrons in pulsed microwave-frequency atmospheric microplasmas

The formation of secondary energetic electrons induced by an abnormal electron-heating mode in pulsed microwave-frequency atmospheric microplasmas was investigated using particle-in-cell simulation. We found that additional high electron heating only occurs during the first period of the ignition phase after the start of a second pulse at sub-millimeter dimensions. During this period, the electrons are unable to follow the abruptly retreating sheath through diffusion alone. Thus, a self-consistent electric field is induced to drive the electrons toward the electrode. These behaviors result in an abnormal electron-heating mode that produces high-energy electrons at the electrode with energies greater than 50‚ÄČeV.
Authors:
 [1] ;  [2] ;  [3] ; ; ;  [1]
  1. Department of Electrical Engineering, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of)
  2. (Korea, Republic of)
  3. Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22251848
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 3; Other Information: (c) 2014 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; ELECTRIC FIELDS; ELECTRODES; HEATING; MICROWAVE RADIATION; PULSES; TAIL ELECTRONS; THERMONUCLEAR IGNITION