| Autor: |
T.W. Debiak |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. :1148-1151 |
| ISSN: |
0168-583X |
| DOI: |
10.1016/0168-583x(91)95118-w |
| Popis: |
Previous experiments have demonstrated that the H− beam extracted from a volume ion source may increase by a factor of 4 or more when cesium vapor is introduced into the arc discharge chamber. We have extended these experiments to cesiated D− beams transported with and without space-charge neutralization by xenon gas. The D− results show qualitatively similar characteristics to those obtained with H−. In particular, a factor of almost 7 in current enhancement was obtained compared with noncesiated beams accompanied by a dramatic reduction in electron current. A study of the beam divergence as a function of extracted equivalent current showed that the divergence of the cesiated beams was larger than the uncesiated beams at the same equivalent current. Introduction of xenon gas at a partial pressure of 2.5 × 10−5 Torr reduced the divergence of the cesiated beams to the value obtained for the uncesiated beams. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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