发明名称 |
CATHODE HEAD WITH FOCAL SPOT CONTROL |
摘要 |
A cathode head (200) is provide that is suitable for use in an x-ray device (100) that includes an anode (300) having a target surface (304) configured and arranged to receive electrons emitted by the cathode head (200). The cathode head (200) may be constructed of magnetic or non-magnetic material and includes an emitter structure (202) carrying a filament (204) that defines a longitudinal axis about which is disposed one or more magnetic elements such as coils (208). The filament (204) is configured and arranged to emit an electron beam that defines a focal spot on the target surface (304) of the anode (300). The magnetic coil, or coils (208), disposed about the longitudinal axis defined by the filament (204) generate a magnetic field that enables control of the location of the focal spot on the target surface of the anode. |
申请公布号 |
WO2005077069(A2) |
申请公布日期 |
2005.08.25 |
申请号 |
WO2005US04139 |
申请日期 |
2005.02.09 |
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 |
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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