Alternate extraction and acceleration of positive and negative ions from a gridded plasma source
By applying a square-wave voltage with frequencies between 10 kHz to 1 MHz to a set of grids terminating an ion-ion plasma source, we experimentally demonstrate the alternate extraction and acceleration of high energy (hundreds of eV) positive and negative ion beams. In addition, the ratio of positi...
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Published in | Plasma sources science & technology Vol. 24; no. 1; pp. 15005 - 8 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
IOP Publishing
01.02.2015
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Subjects | |
Online Access | Get full text |
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Summary: | By applying a square-wave voltage with frequencies between 10 kHz to 1 MHz to a set of grids terminating an ion-ion plasma source, we experimentally demonstrate the alternate extraction and acceleration of high energy (hundreds of eV) positive and negative ion beams. In addition, the ratio of positive-to-negative ion beam current can be controlled by adjusting the applied square-wave duty cycle. Temporally resolved floating potential measurements of a target show that the downstream potential can be controlled and sufficiently reduced at high applied frequencies (∼200 kHz), indicating that space-charge compensation can be achieved to prevent beam stalling. |
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Bibliography: | PSST-100382 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0963-0252 1361-6595 |
DOI: | 10.1088/0963-0252/24/1/015005 |