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 National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 541756
- Patent Number(s):
- 5675606
- Application Number:
- PAN: 8-407,455; TRN: 97:019549
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- 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 = {Tue Oct 07 00:00:00 EDT 1997},
month = {Tue Oct 07 00:00:00 EDT 1997}
}