skip to main content

Title: Ion source studies for particle beam accelerators

High power particle beam accelerators are being developed for use in inertial confinement fusion applications. These pulsed power accelerators require sources of low atomic number ions (e.g., protons, deuterons, carbon, or lithium). The sources must be of high purity for efficient accelerator operation and proper target coupling, must have a rapid ''turn-on,'' and must be compatible with ion diode configurations under development. A particular type of source presently being investigated is the flashover ion source which generates ions by means of the vacuum flashover of an insulating anode material when the high voltage pulse arrives at the diode. We have developed an applied-magnetic-field, extraction ion diode for the 0.03 TW Nereus accelerator specifically to investigate these sources. Extracted ion species are measured by means of a Thomson-parabola ion analyzer, dB/dt current monitors, and Faraday cups. Experiments have been performed to investigate the surface flashover mechanism and the effects of various dielectric source materials, anode preparation methods (including rf glow discharge cleaning), and vacuum conditions on ion species and diode operation.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
5686595
DOE Contract Number:
AC04-76DP00789
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Vac. Sci. Technol., A; (United States); Journal Volume: 3:3
Research Org:
Target Experiments Division 1263, Sandia National Laboratories, Albuquerque, New Mexico 87185
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ACCELERATORS; ION SOURCES; FABRICATION; OPERATION; ANODES; BEAM DYNAMICS; BEAM PRODUCTION; CHEMICAL COMPOSITION; DIELECTRIC MATERIALS; EFFICIENCY; GLOW DISCHARGES; INERTIAL CONFINEMENT; ION BEAMS; BEAMS; CONFINEMENT; ELECTRIC DISCHARGES; ELECTRODES; MATERIALS; PLASMA CONFINEMENT 430301* -- Particle Accelerators-- Ion Sources; 700208 -- Fusion Power Plant Technology-- Inertial Confinement Technology