2009 Fiscal Year Final Research Report
Study of hydrogen plasma affected by strong outer electric field
| Project/Area Number |
20740324
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Plasma science
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| Research Institution | Tokushima Bunri University |
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Principal Investigator |
MATSUMOTO Yoshikatsu Tokushima Bunri University, 人間生活学部, 講師 (50441598)
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| Project Period (FY) |
2008 – 2009
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| Keywords | プラズマ加熱 / イオン源 / 水素負イオン / 輸送 / ビーム引き出し |
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| Research Abstract |
We calculate potential spatial structure at extraction region in a negative ion source with two dimensional Particle-In-Cell(PIC) method. It is confirmed that extraction electric field produced by high beam extraction voltage invades into the ion source plasma though a beam extraction hole. Besides, H^- extraction probability is calculated with H^- trajectory calculation in Monte Carlo method. Then, potential structure needed for the H^- extraction model is assumed by the calculation result of the PIC code. A calculation result with the extraction model is in good agreement with experimental result in H^- extraction probability. From some calculation results with the model, we conclude that potential structure for perpendicular direction to H^- beam axis is a key factor for H^- extraction from a negative ion source.
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