Photomultiplier tube with focusing electrode plate having frame

Details Photomultiplier tube with focusing electrode plate having frame Photomultiplier tube with focusing electrode plate having frame

1997-10-21

1999-03-09

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313533, 313103R, 313103CM, 313105CM, 313537, 313532, 313541, 313544, 250214VT, H01J 4304, H01J 4310, H01J 4318

Patent

active

058804587

ABSTRACT:
In the photomultiplier tube 1, the focusing electrode plate 17 has the focusing portion 20 for focusing incident electrons and the frame 21 surrounding the focusing portion 20. The focusing portion 20 has a plurality of slit openings 18. The dynode unit 10 is constructed from a plurality of dynode plates 11 laminated one on another. Each dynode plate 11 has a plurality of electron through-holes 13 located in confrontation with the plurality of slit openings 18. A plurality of anodes 9 are provided for receiving electrons emitted from the respective through-holes 13 of the dynode unit 10. The frame 21 has dummy openings 22 at positions located in confrontation with edges 15 of the first stage dynode plate 11a in the dynode unit 10.

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