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Title: Motion of a virtual cathode in a cylindrical channel with electron beam transport in the “compressed” state

This paper studies the motion of a virtual cathode in a two-section drift tube with the formation and breakup of the “compressed” state of an electron beam. Experimental arrangements to intercept part of the injected current during the voltage pulse and to provide virtual cathode motion toward the collector are proposed. The arrangements were implemented on the SINUS-7 high-current electron accelerator. Theoretical and experimental dependences of the virtual cathode velocity on the injected current and cathode voltage are presented. The experimental data on virtual cathode motion agree with its theoretical model based on analytical solutions of equations assisted by computer simulation with the PIC code KARAT. The results of the work demonstrate the feasibility of controlling the virtual cathode motion which can be used in collective ion acceleration and microwave generation.
Authors:
; ;  [1] ;  [1] ;  [2]
  1. Institute of High Current Electronics SB RAS, 2/3 Akademichesky Ave., 634055 Tomsk (Russian Federation)
  2. (Russian Federation)
Publication Date:
OSTI Identifier:
22251979
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; ACCELERATION; ANALYTICAL SOLUTION; CATHODES; COMPUTERIZED SIMULATION; CURRENTS; CYLINDRICAL CONFIGURATION; ELECTRIC POTENTIAL; ELECTRON BEAMS; ELECTRONS; IONS; MICROWAVE RADIATION