2015 Fiscal Year Final Research Report
Development and application of high reliable model for beam extraction in hydrogen negative ion source
| Project/Area Number |
25820438
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nuclear fusion studies
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| Research Institution | Tokushima Bunri University |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | イオン源 / 輸送 / ビーム引き出し |
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| Outline of Final Research Achievements |
In this study, simulation codes for beam extraction region of a hydrogen negative ion source have been developed and improved by validations with experimental results in an actual ion source. The codes were required to obtain high reproducibility to experimental results, especially for spatial potential structure in an ion source plasma affected by beam extraction voltage in kV range which has been considered as one of key factors for ion source performances. As a result, the simulation can provide similar results to the experimental ones, even if it uses open boundary condition in Poisson equation which is probably suitable for a purpose of performance predictions in devise designs of negative ion sources although there is disadvantage to obtain reliable results. On the other hand, unforeseen problems were found in potential oscillation and electron transport across magnetic field, which should be overcome to achieve higher reliability of the simulation.
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| Free Research Field |
プラズマ物理学
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