发明名称 |
Field emission cathode and x-ray tube embodying same |
摘要 |
A field emission cathode has a field emitter and an extraction grid, and the field emitter and the extraction grid can be moved relative to one another. Such a field emission cathode is highly durable and exhibits a longer lifespan. An x-ray tube has a field emission cathode composed of a field emitter and an extraction grid that can be moved relative to one another. Such an x-ray tube is highly durable and exhibits a longer lifespan.
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申请公布号 |
US7778391(B2) |
申请公布日期 |
2010.08.17 |
申请号 |
US20090478052 |
申请日期 |
2009.06.04 |
申请人 |
SIEMENS AKTIENGESELLSCHAFT |
发明人 |
FUERST JENS;POPESCU STEFAN;WITTMANN GEORG |
分类号 |
H01J35/00 |
主分类号 |
H01J35/00 |
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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