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Title: Two-dimensional simulation research of secondary electron emission avalanche discharge on vacuum insulator surface

Based on the secondary electron emission avalanche (SEEA) model, the SEEA discharge on the vacuum insulator surface is simulated by using a 2D PIC-MCC code developed by ourselves. The evolutions of the number of discharge electrons, insulator surface charge, current, and 2D particle distribution are obtained. The effects of the strength of the applied electric field, secondary electron yield coefficient, rise time of the pulse, length of the insulator on the discharge are investigated. The results show that the number of the SEEA electrons presents a quadratic dependence upon the applied field strength. The SEEA current, which is on the order of Ampere, is directly proportional to the field strength and secondary electron yield coefficient. Finally, the electron-stimulated outgassing is included in the simulation code, and a three-phase discharge curve is presented by the simulation, which agrees with the experimental data.
Authors:
;  [1] ;  [2] ; ; ;  [3]
  1. Key Laboratory for Physical Electronics and Devices of the Ministry of Education, Xi'an Jiaotong University, Xi'an 710049 (China)
  2. (China)
  3. Northwest Institute of Nuclear Technology, Xi'an, Shaanxi 710024 (China)
Publication Date:
OSTI Identifier:
22408029
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 1; 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; COMPUTERIZED SIMULATION; CURRENTS; DEGASSING; DISTRIBUTION; ELECTRIC DISCHARGES; ELECTRIC FIELDS; ELECTRON EMISSION; ELECTRONS; PULSE RISE TIME; TWO-DIMENSIONAL CALCULATIONS