Production of H− ions by thermal desorption process
H− or D− ion current extracted from a hydrogen or deuterium discharge plasma can be substantially enhanced by introducing a small quantity of an alkaline metal, such as cesium, into the extraction region of the ion source. The increase in the extractable H− or D− current is accompanied by a large re...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-07-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0162487 |
| _version_ | 1797755877012275200 |
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| author | Ka-Ngo Leung |
| author_facet | Ka-Ngo Leung |
| author_sort | Ka-Ngo Leung |
| collection | DOAJ |
| description | H− or D− ion current extracted from a hydrogen or deuterium discharge plasma can be substantially enhanced by introducing a small quantity of an alkaline metal, such as cesium, into the extraction region of the ion source. The increase in the extractable H− or D− current is accompanied by a large reduction in the electron output current. This phenomenon of H− or D− enhancement only occurs when the temperature of the plasma electrode is above 50 °C and reaches a maximum around 300 °C. New experimental results here demonstrate that thermal desorption of H atoms from the surface of an electrode together with a reduction of its surface work-function can account for the increase in H− output current observed in the cesium-seeded volume H− ion sources. |
| first_indexed | 2024-03-12T17:53:28Z |
| format | Article |
| id | doaj.art-53e7e11ea54a45298f01430780a87c9f |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-12T17:53:28Z |
| publishDate | 2023-07-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-53e7e11ea54a45298f01430780a87c9f2023-08-02T20:06:09ZengAIP Publishing LLCAIP Advances2158-32262023-07-01137075123075123-310.1063/5.0162487Production of H− ions by thermal desorption processKa-Ngo Leung0Nuclear Engineering Department, University of California, Berkeley, California 94720, USAH− or D− ion current extracted from a hydrogen or deuterium discharge plasma can be substantially enhanced by introducing a small quantity of an alkaline metal, such as cesium, into the extraction region of the ion source. The increase in the extractable H− or D− current is accompanied by a large reduction in the electron output current. This phenomenon of H− or D− enhancement only occurs when the temperature of the plasma electrode is above 50 °C and reaches a maximum around 300 °C. New experimental results here demonstrate that thermal desorption of H atoms from the surface of an electrode together with a reduction of its surface work-function can account for the increase in H− output current observed in the cesium-seeded volume H− ion sources.http://dx.doi.org/10.1063/5.0162487 |
| spellingShingle | Ka-Ngo Leung Production of H− ions by thermal desorption process AIP Advances |
| title | Production of H− ions by thermal desorption process |
| title_full | Production of H− ions by thermal desorption process |
| title_fullStr | Production of H− ions by thermal desorption process |
| title_full_unstemmed | Production of H− ions by thermal desorption process |
| title_short | Production of H− ions by thermal desorption process |
| title_sort | production of h ions by thermal desorption process |
| url | http://dx.doi.org/10.1063/5.0162487 |
| work_keys_str_mv | AT kangoleung productionofhionsbythermaldesorptionprocess |