| Project/Area Number |
03555062
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
電子材料工学
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| Research Institution | Ehime University |
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Principal Investigator |
KAWANO Hiroyuki Ehime University, Dept.of Chem., Prof., 理学部, 教授 (50006144)
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| Co-Investigator(Kenkyū-buntansha) |
MIYAKE Kiyoshi Hitachi Ltd., Hitachi Res.Lab., Senior Researcher, 日立研究所, 主任研究員
SASAO Mamiko Natl.Inst.for Fusion Science, Ass.Prof., 助教授 (00144171)
WADA Motoi Doshisha Univ., Dept.of Electronics, Ass.Prof., 工学部, 助教授 (30201263)
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| Project Period (FY) |
1991 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥7,400,000 (Direct Cost: ¥7,400,000)
Fiscal Year 1993: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1992: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1991: ¥5,300,000 (Direct Cost: ¥5,300,000)
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| Keywords | Negative ion source / Electron-stimulated desorption / Negative hydrogen ion / Negative alkali metal ion / Thermal negative ion emission / Ion-stimulated desorption / Powdery samples / 電子刺撃脱離 / 塩型水素化物 / イオン収率 / 電子衝撃脱離 / 塩類粉末試料 |
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| Research Abstract |
A simple and small ion source (-1 cm^3) was developed to produce negative ions of even those elements having electron affinity less than -1 eV.A powdery sample (-10 mg) deposited on a gauze (G, -0.1 cm^2) was bombarded with electrons (up to -3 mA and -300 eV) emitted from a filament (F). The ions desorbed from G were easily extracted because F was mounted beneath G.Those ions of H^-, D^-, Li^-, Cl^-, Na^-, F^- and Ag^- were readily produced from various samples such as alkali hydrides and halides. The total ion current, its density and the ion yield (ion to electron current ratio) of H^- from NaH, for example, were as large as -0.1 mA, -1 mA cm^<-2> and -1%, respectively, although the electric power to heat F was only -5 W.Similarly, H^+ was readily produced. Introduction of H_2 had little effect upon the yield of H^<(〕SY.+-.〔)>.
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