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Title: Compact, maintainable 80-KeV neutral beam module

Abstract

A compact, maintainable 80-keV arc chamber, extractor module for a neutral beam system immersed in a vacuum of <10.sup.-2 Torr, incorporating a nested 60-keV gradient shield located midway between the high voltage ion source and surrounding grounded frame. The shield reduces breakdown or arcing path length without increasing the voltage gradient, tends to keep electric fields normal to conducting surfaces rather than skewed and reduces the peak electric field around irregularities on the 80-keV electrodes. The arc chamber or ion source is mounted separately from the extractor or ion accelerator to reduce misalignment of the accelerator and to permit separate maintenance to be performed on these systems. The separate mounting of the ion source provides for maintaining same without removing the ion accelerator.

Inventors:
 [1];  [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
863711
Patent Number(s):
4232244
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:
compact; maintainable; 80-kev; neutral; beam; module; chamber; extractor; immersed; vacuum; 10; -2; torr; incorporating; nested; 60-kev; gradient; shield; located; midway; voltage; source; surrounding; grounded; frame; reduces; breakdown; arcing; path; length; increasing; tends; electric; fields; normal; conducting; surfaces; skewed; peak; field; irregularities; electrodes; mounted; separately; accelerator; reduce; misalignment; permit; separate; maintenance; performed; systems; mounting; provides; maintaining; removing; source provides; path length; electric field; neutral beam; electric fields; surrounding grounded; voltage gradient; shield located; conducting surfaces; surrounding ground; /313/376/

Citation Formats

Fink, Joel H., and Molvik, Arthur W. Compact, maintainable 80-KeV neutral beam module. United States: N. p., 1980. Web.
Fink, Joel H., & Molvik, Arthur W. Compact, maintainable 80-KeV neutral beam module. United States.
Fink, Joel H., and Molvik, Arthur W. Tue . "Compact, maintainable 80-KeV neutral beam module". United States. https://www.osti.gov/servlets/purl/863711.
@article{osti_863711,
title = {Compact, maintainable 80-KeV neutral beam module},
author = {Fink, Joel H. and Molvik, Arthur W.},
abstractNote = {A compact, maintainable 80-keV arc chamber, extractor module for a neutral beam system immersed in a vacuum of <10.sup.-2 Torr, incorporating a nested 60-keV gradient shield located midway between the high voltage ion source and surrounding grounded frame. The shield reduces breakdown or arcing path length without increasing the voltage gradient, tends to keep electric fields normal to conducting surfaces rather than skewed and reduces the peak electric field around irregularities on the 80-keV electrodes. The arc chamber or ion source is mounted separately from the extractor or ion accelerator to reduce misalignment of the accelerator and to permit separate maintenance to be performed on these systems. The separate mounting of the ion source provides for maintaining same without removing the ion accelerator.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1980},
month = {1}
}

Patent:

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