Extraction of volume‐produced H− ions
| Autor: | M. Nachman, M. Bacal, F. Hillion |
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| Rok vydání: | 1985 |
| Předmět: | |
| Zdroj: | Review of Scientific Instruments. 56:649-654 |
| ISSN: | 1089-7623 0034-6748 |
| DOI: | 10.1063/1.1138197 |
| Popis: | The results of an investigation on the extraction of volume‐produced H− ions from several plasma sources, characterized by different magnetic multicusp configurations, as well as from a plasma source with no magnetic containment field, are presented. In all these configurations the extracted negative ion current can be increased and the electron current reduced by a suitable choice of the plasma electrode area and positive bias and of the extraction aperture area. This indicates that the variation of the extracted negative ion current due to the plasma electrode bias is an electrostatic effect. A significant effect of the plasma electrode bias upon the electron density and temperature is only observed in the neighborhood of the plasma electrode, while in the plasma center the negative ion and electron density are unaffected. |
| Databáze: | OpenAIRE |
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