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Title: Low-pressure ion source

Abstract

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%.

Inventors:
; ; ;
Publication Date:
OSTI Identifier:
5693339
Application Number:
ON: DE83018008
Assignee:
SNL; ERA-08-055119; EDB-83-180999
DOE Contract Number:  
AC04-76DP00789
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DEUTERIUM IONS; PENNING ION SOURCES; BEAM EXTRACTION; DESIGN; MILLI AMP BEAM CURRENTS; NEUTRON SOURCES; TRITIUM IONS; BEAM CURRENTS; CHARGED PARTICLES; CURRENTS; ION SOURCES; IONS; PARTICLE SOURCES; RADIATION SOURCES; 640301* - Atomic, Molecular & Chemical Physics- Beams & their Reactions

Citation Formats

Bacon, F. M., Brainard, J. P., O'Hagan, J. B., and Walko, R. J. Low-pressure ion source. United States: N. p., 1982. Web.
Bacon, F. M., Brainard, J. P., O'Hagan, J. B., & Walko, R. J. Low-pressure ion source. United States.
Bacon, F. M., Brainard, J. P., O'Hagan, J. B., and Walko, R. J. 1982. "Low-pressure ion source". United States. https://www.osti.gov/servlets/purl/5693339.
@article{osti_5693339,
title = {Low-pressure ion source},
author = {Bacon, F. M. and Brainard, J. P. and O'Hagan, J. B. and Walko, R. J.},
abstractNote = {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%.},
doi = {},
url = {https://www.osti.gov/biblio/5693339}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 27 00:00:00 EDT 1982},
month = {Wed Oct 27 00:00:00 EDT 1982}
}