发明名称 |
HOT-CATHODE ELECTRON IMPACT TYPE ION SOURCE |
摘要 |
PURPOSE:To obtain a hot-cathode electron impact type ion source of high sensitivity which is used for a tetrode analyzer by installing a hot cathode around an anode and by installing doughnut-like electrodes (which constitute an electron diaphragm electrode) over and under the hot cathode. CONSTITUTION:An annular hot cathode 3 is installed around a cylindrical cage- like anode 1 which has an electron permeable grid-like or mesh-like circumferential area. At the same time, doughnut-like electrode plates 21 and 22 (which constitute an electron diaphragm electrode 2) are installed over and under the cathode 3, thereby constituting a hot-cathode electron impact type ion source for a tetrode analyzer. As a result, it is possible to concentrate thermions discharged from the hot cathode 3 efficiently in the cylindrical cage-like anode 1 without deteriorating the electron diaphragm effect, thereby obtaining an ion source of high sensitivity. |
申请公布号 |
JPS6084756(A) |
申请公布日期 |
1985.05.14 |
申请号 |
JP19830192115 |
申请日期 |
1983.10.14 |
申请人 |
SEIKO DENSHI KOGYO KK;WATANABE FUMIO |
发明人 |
WATANABE FUMIO;KOMAKI SHIYOUJIROU;MIYAMOTO MASAO;ITOU TAKAO |
分类号 |
H01J49/14;G01N27/62;G21K1/00;H01J27/02;H01J27/08 |
主分类号 |
H01J49/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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