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.
- Inventors:
-
- Albuquerque, NM
- Issue Date:
- Research Org.:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- OSTI Identifier:
- 871175
- Patent Number(s):
- 5675606
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- solenoid; monocusp; source; generates; hydrogen; atomic; purity; incorporates; solenoidal; permanent; magnets; increase; electron; path; length; sealed; envelope; electrons; emitted; cathode; traverse; magnetic; field; lines; magnet; reflector; collide; gas; molecular; forms; plasma; anode; grazes; outer; boundary; energy; remain; substantially; cusp; scattered; aperture; additional; collisions; create; increased; allows; diameters; operating; pressures; operating pressure; operating pressures; energy electrons; molecular gas; field lines; path length; permanent magnet; magnetic field; permanent magnets; electrons emitted; energy electron; remain substantially; outer boundary; sealed envelope; /315/
Citation Formats
Brainard, John Paul, Burns, Erskine John Thomas, and Draper, Charles Hadley. Solenoid and monocusp ion source. United States: N. p., 1997.
Web.
Brainard, John Paul, Burns, Erskine John Thomas, & Draper, Charles Hadley. Solenoid and monocusp ion source. United States.
Brainard, John Paul, Burns, Erskine John Thomas, and Draper, Charles Hadley. Wed .
"Solenoid and monocusp ion source". United States. https://www.osti.gov/servlets/purl/871175.
@article{osti_871175,
title = {Solenoid and monocusp ion source},
author = {Brainard, John Paul and Burns, Erskine John Thomas and Draper, Charles Hadley},
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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}
Works referenced in this record:
Single‐ring magnetic cusp ion source
journal, November 1983
- Brainard, J. P.; O’Hagan, J. B.
- Review of Scientific Instruments, Vol. 54, Issue 11