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Method of enhancing cyclotron beam intensity

Patent ·
OSTI ID:862949
 [1];  [2]
  1. Knoxville, TN
  2. East Lansing, MI
+ Show Author Affiliations

When an easily ionized support gas such as xenon is added to the cold cathode in sources of the Oak Ridge Isochronous Cyclotron, large beam enhancements are produced. For example, .sup.20 Ne.sup.7+ is increased from 0.05 enA to 27 enA, and .sup.16 O.sup.5+ intensities in excess of 35 e.mu.A have been extracted for periods up to 30 minutes. Approximately 0.15 cc/min of the easily ionized support gas is supplied to the ion source through a separate gas feed line and the primary gas flow is reduced by about 30%.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
Assignee:
United States of America as represented by United States Energy (Washington, DC)
Patent Number(s):
US 4055782
OSTI ID:
862949
Country of Publication:
United States
Language:
English

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/315/313/
05
15
16
20
27
30
35
added
approximately
beam
beam intensity
cathode
cc
cold
cold cathode
cyclotron
cyclotron beam
easily
ena
enhancements
enhancing
example
excess
extracted
feed
feed line
flow
gas
gas feed
gas flow
increased
intensities
intensity
ionized
isochronous
line
method
minutes
oak
periods
primary
primary gas
produced
reduced
ridge
separate
source
sources
supplied
support
support gas
xenon