Neutral particle beam intensity controller

Patent · Wed Jan 01 04:00:00 EST 1986

OSTI ID:865892

Dagenhart, William K ^[1]

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1. Oak Ridge, TN

A neutral beam intensity controller is provided for a neutral beam generator in which a neutral beam is established by accelerating ions from an ion source into a gas neutralizer. An amplitude modulated, rotating magnetic field is applied to the accelerated ion beam in the gas neutralizer to defocus the resultant neutral beam in a controlled manner to achieve intensity control of the neutral beam along the beam axis at constant beam energy. The rotating magnetic field alters the orbits of ions in the gas neutralizer before they are neutralized, thereby controlling the fraction of neutral particles transmitted out of the neutralizer along the central beam axis to a fusion device or the like. The altered path or defocused neutral particles are sprayed onto an actively cooled beam dump disposed perpendicular to the neutral beam axis and having a central open for passage of the focused beam at the central axis of the beamline. Virtually zero therough 100% intensity control is achieved by varying the magnetic field strength without altering the ion source beam intensity or its species yield.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
• DOE Contract Number: W-7405-ENG-26
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4596687
• OSTI ID: 865892
• Country of Publication: United States
• Language: English

Related Subjects

/376/250/313/
100
accelerated
accelerating
achieve
achieved
actively
actively cooled
altered
altering
alters
amplitude
amplitude modulated
applied
axis
beam
beam axis
beam dump
beam energy
beam generator
beam intensity
beamline
central
central axis
central beam
constant
constant beam
control
controlled
controlled manner
controller
controlling
cooled
defocus
defocused
device
disposed
disposed perpendicular
dump
energy
established
field
field strength
focused
focused beam
fraction
fusion
gas
generator
intensity
intensity control
intensity controller
magnetic
magnetic field
manner
modulated
neutral
neutral beam
neutral particle
neutral particles
neutralized
neutralizer
orbits
particle
particle beam
particles
passage
path
perpendicular
provided
resultant
rotating
rotating magnetic
source
source beam
species
species yield
sprayed
strength
therough
transmitted
varying
virtually
yield
zero