Measurements of beam current density and proton fraction of a permanent-magnet microwave ion source

Journal Article · Tue Nov 15 00:00:00 EST 2011 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3660282· OSTI ID:22066281

Waldmann, Ole; Ludewigt, Bernhard ^[1]

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1. Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720 (United States)

A permanent-magnet microwave ion source has been built for use in a high-yield, compact neutron generator. The source has been designed to produce up to 100 mA of deuterium and tritium ions. The electron-cyclotron resonance condition is met at a microwave frequency of 2.45 GHz and a magnetic field strength of 87.5 mT. The source operates at a low hydrogen gas pressure of about 0.15 Pa. Hydrogen beams with a current density of 40 mA/cm{sup 2} have been extracted at a microwave power of 450 W. The dependence of the extracted proton beam fraction on wall materials and operating parameters was measured and found to vary from 45% for steel to 95% for boron nitride as a wall liner material.

• OSTI ID: 22066281
• Journal Information: Review of Scientific Instruments, Vol. 82, Issue 11; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM CURRENTS
BORON NITRIDES
CURRENT DENSITY
ELECTRON CYCLOTRON-RESONANCE
GHZ RANGE
ION SOURCES
MAGNETIC FIELDS
MICROWAVE RADIATION
NEUTRON GENERATORS
PERMANENT MAGNETS
PROTON BEAMS
PROTONS
STEELS
TRITIUM IONS
YIELDS