Neutral beamline with ion energy recovery based on magnetic blocking of electrons

Patent · Fri Jan 01 04:00:00 EST 1982

OSTI ID:864337

Stirling, William L ^[1]

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1. Oak Ridge, TN

A neutral beamline generator with energy recovery of the full-energy ion ponent of the beam based on magnetic blocking of electrons is provided. Ions from a positive ion source are accelerated to the desired beam energy from a slightly positive potential level with respect to ground through a neutralizer cell by means of a negative acceleration voltage. The unneutralized full-energy ion component of the beam exiting the neutralizer are retarded and slightly deflected and the electrons in the neutralizer are blocked by a magnetic field generated transverse to the beamline. An electron collector in the form of a coaxial cylinder surrounding and protruding axial a few centimeters beyond the neutralizer exit terminates the electrons which exit the neutralizer in an E x B drift to the collector when the collector is biased a few hundred volts positive with respect to the neutralizer voltage. The neutralizer is operated at the negative acceleration voltage, and the deflected full energy ions are decelerated and the charge collected at ground potential thereby expending none of their energy received from the acceleration power supply.

• 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 Department of Energy (Washington, DC)
• Patent Number(s): US 4349505
• OSTI ID: 864337
• Country of Publication: United States
• Language: English

Related Subjects

/376/250/976/
accelerated
acceleration
acceleration voltage
axial
based
beam
beam energy
beam exit
beam exiting
beamline
beamline generator
biased
blocked
blocking
cell
centimeters
charge
charge collected
coaxial
collected
collector
component
cylinder
decelerated
deflected
desired
desired beam
drift
electron
electron collector
electrons
energy
energy received
energy recovery
exit
exiting
expending
field
field generated
form
full-energy
generated
generator
ground
ground potential
hundred
hundred volts
level
magnetic
magnetic blocking
magnetic field
means
negative
negative acceleration
neutral
neutral beam
neutral beamline
neutralizer
neutralizer cell
operated
ponent
positive
positive potential
potential
power
power supply
protruding
provided
received
recovery
respect
retarded
slightly
source
supply
surrounding
terminates
transverse
unneutralized
voltage
volts