Ion source
Abstract
A magnetic filter for an ion source reduces the production of undesired ion species and improves the ion beam quality. High-energy ionizing electrons are confined by the magnetic filter to an ion source region, where the high-energy electrons ionize gas molecules. One embodiment of the magnetic filter uses permanent magnets oriented to establish a magnetic field transverse to the direction of travel of ions from the ion source region to the ion extraction region. In another embodiment, low energy 16 eV electrons are injected into the ion source to dissociate gas molecules and undesired ion species into desired ion species.
- Inventors:
-
- Hercules, CA
- Alamo, CA
- Issue Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- OSTI Identifier:
- 864998
- Patent Number(s):
- 4447732
- 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:
- W-7405-ENG-48
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- source; magnetic; filter; reduces; production; undesired; species; improves; beam; quality; high-energy; ionizing; electrons; confined; region; ionize; gas; molecules; embodiment; permanent; magnets; oriented; establish; field; transverse; direction; travel; extraction; energy; 16; injected; dissociate; desired; beam quality; magnetic filter; energy electrons; gas molecules; permanent magnet; magnetic field; permanent magnets; energy electron; source reduces; energy ionizing; high-energy electron; high-energy electrons; extraction region; ionizing electrons; /250/315/376/
Citation Formats
Leung, Ka-Ngo, and Ehlers, Kenneth W. Ion source. United States: N. p., 1984.
Web.
Leung, Ka-Ngo, & Ehlers, Kenneth W. Ion source. United States.
Leung, Ka-Ngo, and Ehlers, Kenneth W. Sun .
"Ion source". United States. https://www.osti.gov/servlets/purl/864998.
@article{osti_864998,
title = {Ion source},
author = {Leung, Ka-Ngo and Ehlers, Kenneth W},
abstractNote = {A magnetic filter for an ion source reduces the production of undesired ion species and improves the ion beam quality. High-energy ionizing electrons are confined by the magnetic filter to an ion source region, where the high-energy electrons ionize gas molecules. One embodiment of the magnetic filter uses permanent magnets oriented to establish a magnetic field transverse to the direction of travel of ions from the ion source region to the ion extraction region. In another embodiment, low energy 16 eV electrons are injected into the ion source to dissociate gas molecules and undesired ion species into desired ion species.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1984},
month = {1}
}
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