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Method and apparatus for operating an electrical discharge device
专利权人:
Michael Loeken
发明人:
Michael Loeken,Jakob Willi Neff,Juergen Klein,Sven Probst
申请号:
US11720638
公开号:
US08227777B2
申请日:
2005.11.29
申请国别(地区):
US
年份:
2012
代理人:
摘要:
The present invention relates to a method of operating an electrical discharge device (12) comprising at least one first electrode (14) and at least one second electrode (16) at a distance therefrom, which electrodes are electrically connected to a power supply (18) and, upon ignition of a first gas discharge (22) between the electrodes (14, 16), transmit an electrical current (I), as a result of which a plasma (24) is produced in a working gas (26), which plasma emits radiation (28), in particular extreme ultraviolet and/or soft X-ray radiation, which is passed via a solid angle (30) into a chamber (32) outside the electrodes (14, 16). In order to prevent erosion at the electrodes (14, 16), it is proposed that the formation of a secondary plasma (34) in the chamber (32) is suppressed by a device (42).
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