发明申请
US20100038556A1 HOT CATHODE AND ION SOURCE INCLUDING THE SAME 有权
热阴极和离子源包括它

HOT CATHODE AND ION SOURCE INCLUDING THE SAME
摘要:
A hot cathode includes: a hollow external conductor; a hollow internal conductor which is placed coaxially inside the external conductor; and a connection conductor which electrically connects tip end portions of the conductors. A heating current is folded back through the connection conductor to flow in opposite directions in the external conductor and the internal conductor.
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