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