发明公开
EP0417649A2 Plasma switch with hollow, thermionic cathode
失效
Plasmal-Schalter mit hohler，thermionischer Kathode。
- 专利标题： Plasma switch with hollow, thermionic cathode
- 专利标题（中）： Plasmal-Schalter mit hohler，thermionischer Kathode。
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申请号： EP90117209.8申请日： 1990-09-06
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公开(公告)号： EP0417649A2公开(公告)日： 1991-03-20
- 发明人: Schumacher, Robert W. , Poeschel, Robert L.
- 申请人： Hughes Aircraft Company
- 申请人地址： 7200 Hughes Terrace P.O. Box 45066 Los Angeles, California 90045-0066 US
- 专利权人： Hughes Aircraft Company
- 当前专利权人： Hughes Aircraft Company
- 当前专利权人地址： 7200 Hughes Terrace P.O. Box 45066 Los Angeles, California 90045-0066 US
- 代理机构： KUHNEN, WACKER & PARTNER
- 优先权： US406673 19890913
- 主分类号： H01J17/50
- IPC分类号： H01J17/50 ; H01J17/04
摘要：
A hollow cathode (16) capable of self-heating by back ion bombardment to a thermionic emission temperature axially discharges therefrom an ionized plasma (26) of an ambient gas (14) such as xenon. Electrons are axially or radially extractable from the plasma (26) by an anode (18). A voltage is applied to a keeper electrode (20) disposed between the cathode (16) and anode (18) to sustain plasma (26) discharge of the gas (14) between the cathode (16) and keeper electrode (20). A control electrode (22) is disposed between the keeper electrode (20) and the anode (18). Application of a positive voltage (relative to the cathode) to the control electrode (22) causes the plasma (26) discharge to extend from the cathode (16) to the anode (18), thus closing the switch. Application of a negative control electrode (22) voltage, or simply returning the control electrode (22) to cathode (16) potential, causes the plasma (26) discharge to retract back to the area of the keeper electrode (20), thereby opening the switch.
公开/授权文献
- EP0417649B1 Plasma switch with hollow, thermionic cathode 公开/授权日：1995-12-27
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