Low-pressure ion source

Patent · Wed Oct 27 04:00:00 EDT 1982

OSTI ID:5693339

Bacon, F. M.; Brainard, J. P.; O'Hagan, J. B.; Walko, R. J.

A low pressure ion source for a neutron source comprises a filament cathode and an anode ring. Approximately 150V is applied between the cathode and the anode. Other electrodes, including a heat shield, a reflector and an aperture plate with a focus electrode, are placed at intermediate potentials. Electrons from the filament drawn out by the plasma and eventually removed by the anode are contained in a magnetic field created by a magnet ring. Ions are formed by electron impact with deuterium or tritium and are extracted at the aperture in the focus electrode. The ion source will typically generate a 200 mA beam through a 1.25 cm/sup 2/ aperture for an arc current of 10A. For deuterium gas, the ion beam is over 50 percent D/sup +/ with less than 1% impurity. The current density profile across the aperture will typically be uniform to within 20%.

• DOE Contract Number: AC04-76DP00789
• Assignee: SNL; EDB-83-180999; ERA-08-055119
• Patent Number(s): None
• Application Number: ON: DE83018008
• OSTI ID: 5693339
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEAM CURRENTS
BEAM EXTRACTION
CHARGED PARTICLES
CURRENTS
DESIGN
DEUTERIUM IONS
ION SOURCES
IONS
MILLI AMP BEAM CURRENTS
NEUTRON SOURCES
PARTICLE SOURCES
PENNING ION SOURCES
RADIATION SOURCES
TRITIUM IONS