skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: 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:
 [1];  [2]
  1. (Hercules, CA)
  2. (Alamo, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
864998
Patent Number(s):
4447732
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
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}
}

Patent:

Save / Share: