Compact, maintainable 80-KeV neutral beam module

Patent · Tue Jan 01 00:00:00 EST 1980

OSTI ID:863711

Fink, Joel H ^[1]; Molvik, Arthur W ^[1]

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1. Livermore, CA

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.

• Research Organization: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4232244
• OSTI ID: 863711
• Country of Publication: United States
• Language: English

Related Subjects

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/