| 发明名称 |
HIgh brightness thermionic cathode |
| 摘要 |
An improved thermionic cathode is provided. The cathode has a carbon-coated cone surface and reduced cone angle (e.g. typically 60 degrees or less) that delivers an electron beam with high angular intensity and brightness and exhibits increased longevity.
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| 申请公布号 |
US2005174030(A1) |
申请公布日期 |
2005.08.11 |
| 申请号 |
US20040774693 |
申请日期 |
2004.02.10 |
| 申请人 |
DIVISION OF TOSHIBA MACHINE AMERICA, INC. |
发明人 |
KATSAP VICTOR |
| 分类号 |
H01J1/14;H01J1/148;H01J1/15;H01J1/16;H01J9/04;H01J37/06;(IPC1-7):H01J1/14;H01J19/06 |
主分类号 |
H01J1/14 |
| 代理机构 |
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代理人 |
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| 主权项 |
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