Numerical simulation of ion-beam formation (invited)
- Institut fuer Angewandte Physik der J. W. Goethe-Universitaet, D-60054 Frankfurt (Germany)
The methods of numerical simulation of particle optics problems are examined with respect to their accuracy and stability. Principles of space-charge optics and of beam formation are recalled to address questions like the general validity of the 3/2-power law and the Pierce angle. For the simplest mathematical model of the plasma sheath the {open_quote}{open_quote}correct{close_quote}{close_quote} shape of the wall electrode is calculated analytically and compared with numerical simulations. The result will be used to establish engineering rules for the extraction of ion beams from a plasma with minimum aberration. The compensation of ion beams by electrons and the influence of this on ion-beam formation is discussed both from the viewpoint of theoretical analysis of compensation as well as on the basis of experimental evidence. {copyright} {ital 1996 American Institute of Physics.}
- OSTI ID:
- 434563
- Report Number(s):
- CONF-9509125-; ISSN 0034-6748; TRN: 97:003668
- Journal Information:
- Review of Scientific Instruments, Vol. 67, Issue 3; Conference: 6. international conference on ion sources, Whistler (Canada), 10-16 Sep 1995; Other Information: PBD: Mar 1996
- Country of Publication:
- United States
- Language:
- English
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