An rf ion source has been constructed, which yields up to 15 ma of hydrogen ion current consisting of 80–90 percent protons. The ion current yield has been studied as a function of rf power and frequency, gas pressure, and dc (extracting) voltage. These relationships are correlated with internal phenomena of the gas discharge and of ion extraction therefrom.

1.
For references see
M.
Hoyaux
 and
I.
Dujardin
, “
Comparative Survey of Ion Guns‐II
,”
Nucleonics
4
, No.
6
,
12
(
1949
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2.
J. Symonds, private communication (University of Birmingham, England).
3.
This coil‐capacitor system could of course be the final stage of the oscillator. However, our requirements were such that the oscillator was to be located some distance from the source.
4.
Leonard B. Loeb, Fundamental Processes of Electrical Discharge in Gases (John Wiley and Sons, Inc., New York, 1939), p. 237.
5.
Moak
,
Reese
, and
Good
,
Nucleonics
9
, No.
3
(
1951
).
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© 1954 American Institute of Physics.
1954
American Institute of Physics
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