Neutral particle beam intensity controller

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865892

Dagenhart, William K ^[1]

---

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 (United States)
• 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

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