公开(公告)号：US3872337A

公开(公告)日：1975-03-18

申请号：US44437074

申请日：1974-02-21

Applicant: EMI LTD

Inventor： DAVIS GORDON PETER ,  WARDLEY JOHN

IPC: H01J43/06 ,  H01J1/32 ,  H01J43/20 ,  H01J39/04

CPC classification number: H01J43/20

Abstract: A multichannel electron multiplier has a plurality of multiplying stages. Each stage is formed from a flat plate of secondary electron emissive material slit into a plurality of fingers. Alternate fingers are twisted out of the plane of the plate at right angles thereto. The twisted fingers in successive stages are staggered to provide a plurality of zigzag electron multiplying channels. The source of electrons to be multiplied in a photo-electron emissive cathode and light is focused or collimated onto the photocathode at positions corresponding to the multiplying channels. In a second embodiment, the faceplate of a multiplier tube is a fibre optics plate and light is directed onto it by fibre optics light guides to positions corresponding to the multiplying channels. A focusing electrode is disposed between the photocathode and the first multiplying stage and serves to focus electrons onto the twisted fingers. The non-twisted fingers also help to focus electrons onto the twisted fingers in successive multiplying stages along the multiplying channels.

Abstract translation: 多通道电子倍增器具有多个倍增级。 每个阶段由二次电子发射材料的平板形成为多个指状物。 替代的手指以与其成直角的方式扭转出板的平面。 扭转的手指在连续的阶段是交错的以提供多个之字形电子倍增通道。 在光电子发射阴极和光中乘以的电子源在对应于倍增通道的位置处聚焦或准直到光电阴极上。 在第二实施例中，乘法器管的面板是光纤板，并且光通过光纤光导被引导到与乘法通道相对应的位置。 聚光电极设置在光电阴极和第一倍增台之间，用于将电子聚焦到扭转的指状物上。 非扭转的手指还有助于沿着乘法通道在连续的乘法阶段中将电子聚焦到扭转的手指上。