发明名称 |
Cathode head with focal spot control |
摘要 |
A cathode head is provide that is suitable for use in an x-ray device that includes an anode having a target surface configured and arranged to receive electrons emitted by the cathode head. The cathode head may be constructed of magnetic or non-magnetic material and includes an emitter block carrying a filament that defines a longitudinal axis about which is disposed one or more magnetic coils. The filament is configured and arranged to emit an electron beam that defines a focal spot on the target surface of the anode. The magnetic coil, or coils, disposed about the longitudinal axis defined by the filament generate a magnetic field that enables control of the location of the focal spot on the target surface of the anode.
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申请公布号 |
US2005175152(A1) |
申请公布日期 |
2005.08.11 |
申请号 |
US20040776540 |
申请日期 |
2004.02.09 |
申请人 |
VARIAN MEDICAL SYSTEMS TECHNOLOGIES, INC. |
发明人 |
SMITH RICKY |
分类号 |
H01J29/46;H01J29/70;H01J35/00;H01J35/06;H01J35/08;H01J35/10;H01J35/14;H01J35/22;H01J35/30;H05G1/52;(IPC1-7):H01J35/06 |
主分类号 |
H01J29/46 |
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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