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 |
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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 |