Mechanical design criteria for continuously operating neutral beams

Technical Report · Fri Aug 26 04:00:00 EDT 1977

DOI:https://doi.org/10.2172/5448623· OSTI ID:5448623

Vosen, S. R.; Bender, D. J.; Fink, J. H.; Lee, J. D.

A schematic of a neutral beam injector is shown. Neutral gas is injected into the ion source, where a discharge ionizes the gas. The ions are drawn from the source by an extractor grid and then accelerated to full energy by the accel grids. After acceleration the ions pass through the neutralizer cell. Once through the neutralizer cell, the beam consists of neutrals and ions. The ions traveling with the beam are space charge neutralized by background electrons. The grid which precedes the direct converter is negatively charged and acts to separate the electrons from the rest of the beam. As a result of the beam's uncompensated space charge the remaining ions spread out from the beam to be collected at the direct converter. This paper presents a generalized analysis which will be useful in determining effects of energy and particle fluxes on the long-term performance of the grids. (MOW)

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• Sponsoring Organization: US Energy Research and Development Administration (ERDA)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5448623
• Report Number(s): UCID-17573
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700205* -- Fusion Power Plant Technology-- Fuel
Heating
& Injection Systems
CHARGED PARTICLES
ELECTRODES
GRIDS
IONS
IRRADIATION
LIFETIME
NEUTRAL BEAM SOURCES
PERFORMANCE
THERMONUCLEAR REACTORS