A Radio-frequency Positive Ion Sources
Author | : Anthony Demetriades |
Publisher | : |
Total Pages | : 49 |
Release | : 1953 |
Genre | : Ions |
ISBN | : |
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Author | : Anthony Demetriades |
Publisher | : |
Total Pages | : 49 |
Release | : 1953 |
Genre | : Ions |
ISBN | : |
Author | : Aage Svarrer Poulsen |
Publisher | : |
Total Pages | : 104 |
Release | : 1953 |
Genre | : Radio |
ISBN | : |
Author | : Charles Frederick Campen jr |
Publisher | : |
Total Pages | : 52 |
Release | : 1950 |
Genre | : |
ISBN | : |
Author | : |
Publisher | : |
Total Pages | : 8 |
Release | : 1995 |
Genre | : |
ISBN | : |
A versatile, high brightness, volume type, low power RF source, capable of producing positive ion beams with intensities as high as 1 mA from gaseous feed materials and microamperes of negative ion beams has been characterized. The source can also be operated as a plasma sputter negative ion source to generate up to 1 mA of a selected species. The performance of the source in the positive and negative volume modes of operation can be greatly enhanced by addition of a removable, water cooled filament assembly in place of the negative sputter probe. For examine, the material utilization efficiencies of gaseous feed species can be more than doubled, total current intensities increased up to 40%, molecular dissociation fractions increased by 20% and minimum operating pressures reduced by a factor of four when operated in the volume mode. These added electrons also favorably effect, as a consequence of lower pressures, the emittance apparently through a reduction of scattering in the beam through the transport system. A brief description of the source and performance data for the positive volume mode of operation is presented.
Author | : B. Cecil Thompson |
Publisher | : |
Total Pages | : 60 |
Release | : 1958 |
Genre | : Anions |
ISBN | : |
Author | : Michael L. Sherrill |
Publisher | : |
Total Pages | : 64 |
Release | : 1963 |
Genre | : |
ISBN | : |
Author | : John Atkin Biggerstaff |
Publisher | : |
Total Pages | : |
Release | : 1953 |
Genre | : |
ISBN | : |
Author | : Norman Harold Ditrick |
Publisher | : |
Total Pages | : 40 |
Release | : 1952 |
Genre | : Ions |
ISBN | : |
Author | : Donald Leroy Shirer |
Publisher | : |
Total Pages | : 76 |
Release | : 1953 |
Genre | : Radio frequency modulation |
ISBN | : |
Author | : Thomas G. Clapp |
Publisher | : |
Total Pages | : 16 |
Release | : 1965 |
Genre | : Cations |
ISBN | : |
The report gives very brief descriptions of most of the existing types of positive ion sources, listing some of their characteristics, advantages and disadvantages. It is concluded that the radio-frequency source is best suited for lunar simulation studies. (Author).