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Title: Solenoid and monocusp ion source

Abstract

An ion source which generates hydrogen ions having high atomic purity incorporates a solenoidal permanent magnets to increase the electron path length. In a sealed envelope, electrons emitted from a cathode traverse the magnetic field lines of a solenoid and a monocusp magnet between the cathode and a reflector at the monocusp. As electrons collide with gas, the molecular gas forms a plasma. An anode grazes the outer boundary of the plasma. Molecular ions and high energy electrons remain substantially on the cathode side of the cusp, but as the ions and electrons are scattered to the aperture side of the cusp, additional collisions create atomic ions. The increased electron path length allows for smaller diameters and lower operating pressures. 6 figs.

Inventors:
; ;
Issue Date:
Research Org.:
Sandia Corporation
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
541756
Patent Number(s):
5,675,606
Application Number:
PAN: 8-407,455; TRN: 97:019549
Assignee:
Dept. of Energy, Washington, DC (United States) SNL; SCA: 661220; PA: EDB-97:142487; SN: 97001865608
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 7 Oct 1997
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; ION SOURCES; HYDROGEN IONS; DESIGN; PLASMA PRODUCTION; SOLENOIDS

Citation Formats

Brainard, J.P., Burns, E.J.T., and Draper, C.H. Solenoid and monocusp ion source. United States: N. p., 1997. Web.
Brainard, J.P., Burns, E.J.T., & Draper, C.H. Solenoid and monocusp ion source. United States.
Brainard, J.P., Burns, E.J.T., and Draper, C.H. Tue . "Solenoid and monocusp ion source". United States.
@article{osti_541756,
title = {Solenoid and monocusp ion source},
author = {Brainard, J.P. and Burns, E.J.T. and Draper, C.H.},
abstractNote = {An ion source which generates hydrogen ions having high atomic purity incorporates a solenoidal permanent magnets to increase the electron path length. In a sealed envelope, electrons emitted from a cathode traverse the magnetic field lines of a solenoid and a monocusp magnet between the cathode and a reflector at the monocusp. As electrons collide with gas, the molecular gas forms a plasma. An anode grazes the outer boundary of the plasma. Molecular ions and high energy electrons remain substantially on the cathode side of the cusp, but as the ions and electrons are scattered to the aperture side of the cusp, additional collisions create atomic ions. The increased electron path length allows for smaller diameters and lower operating pressures. 6 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}