发明名称 Bifocal cathode for X=ray tube e.g. in medical X=ray scanner - has central tungsten filament with other two filaments symmetrically placed, and whole structure situated inside metallic piece which focuses beam
摘要 The cathode includes a filament (7) made of wolfram and having a circular section. The filament has a number of turns with a variable thread with its extremities presenting a reduced thread to compensate for thermal losses. The cathode generates an X-ray beam which has a high density. The cathode filament is placed inside a metallic piece which focuses the beam generated. Two other filaments are placed symmetrically relative to the first filament. ADVANTAGE - Ensures good alignment of cathode and anode with uniform distribution of energy.
申请公布号 FR2699326(A1) 申请公布日期 1994.06.17
申请号 FR19920014974 申请日期 1992.12.11
申请人 GENERAL ELECTRIC CGR 发明人 GUERIN CHRISTINE;BLIN PHILIPPE;COQUOZ OLIVIER
分类号 H01J35/06;(IPC1-7):H01J35/06;H01J1/22 主分类号 H01J35/06
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