A 3D computer simulation of negative ion extraction influenced by electron diffusion and weak magnetic field

The numerical model of negative ion beam extraction from the RF ion source by different kinds of large extraction grid systems is considered. The model takes into account the influence of the transversal magnetic field and the electron diffusion. The magnetic filter field increases H- yields signifi...

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Bibliographic Details
Main Authors: Turek, M, Sielanko, J
Format: Conference Proceeding
Language:English
Subjects:
BEAM CURRENTS
BEAM EXTRACTION
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
COMPUTERIZED SIMULATION
DIFFUSION
ELECTRONS
HYDROGEN IONS 1 MINUS
ION SOURCES
MAGNETIC FIELDS
MAGNETIC FILTERS
PARTICLE ACCELERATORS
PLASMA BEAM INJECTION
PLASMA SIMULATION
TOKAMAK DEVICES
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Summary:The numerical model of negative ion beam extraction from the RF ion source by different kinds of large extraction grid systems is considered. The model takes into account the influence of the transversal magnetic field and the electron diffusion. The magnetic filter field increases H- yields significantly. The random-walk electron diffusion model enables electrons to travel through magnetic field. The H- currents obtained from simulations with or without the diffusion are compared.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.2909177