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Title: Lifetime of hydrogenated composite cathodes in a vacuum arc ion source

The paper reports on a study of the mass-charge state of the plasma produced in a vacuum arc discharge with composite cathodes which were copper-disk coated with a hydrogenated Zr film of thicknesses 9, 22, and 35 μm. The cathodes allow the generation of multicomponent gas and metal ion beams with a hydrogen ion content from several to several tens of percent. Also investigated is the dependence of the H ion fraction in a beam on the Zr film thickness during erosion to the point of disappearance of Zr peaks in mass-charge spectra. The ability of the vacuum arc system to produce H ions is analyzed by analyzing the cathode lifetime as a function of the film thickness and pulse repetition frequency.
Authors:
; ; ;  [1] ;  [1] ;  [2] ;  [3]
  1. Institute of High Current Electronics SB RAS, Tomsk 634055 (Russian Federation)
  2. (Russian Federation)
  3. Prokhorov General Physics Institute RAS, Moscow 119991 (Russian Federation)
Publication Date:
OSTI Identifier:
22482906
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CATHODES; CHARGE STATES; COPPER; EROSION; FILMS; HYDROGEN IONS; HYDROGENATION; ION BEAMS; LIFETIME; MASS; PLASMA; PULSES; SPECTRA; THICKNESS