On ion sources with high efficiency and intensity
The conditions determining the shape of the ion emitting plasma cap in ion sources are analyzed. Dense plasmas (n/sub 1/ = 1O/sup 14/) give expanding caps like in the Von Ardenne source. Thin plasmas (n/sub i/ = 10/sup 14/) give inward bended caps like in all normal ion sources. This difference in shape means a difference in ion emission with a factor ten. The problem of an ion source with a high material efficiency is solved by the magnetic type ion sources. The Von Ardenne source has a high density plasma (n/sub i/ = lO/sup 14/) in the emission region with an extremely high electron temperature. Therefore hardly any neutral particles are available. In the magnetic PIG type sources the material efficiency is obtained by internal ion focusing. They run with low plasma density (n/sub i/ = 10/sup 10/). For the separation of microgram quantities of rare materials (radioactive or toxic like plutonium) the PIG type source should be preferred over the normally used arc source.
- Research Organization:
- F.O.M. - Laboratorium voor Massaspectrgrafie, Amsterdam
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-012288
- OSTI ID:
- 4073796
- Journal Information:
- Nuclear Instruments and Methods, Vol. 11, Issue C; Other Information: Orig. Receipt Date: 31-DEC-61; ISSN 0029-554X
- Publisher:
- Elsevier
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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