H - Electricity – 01 – J
Patent
H - Electricity
01
J
313/75
H01J 43/24 (2006.01) H01J 43/22 (2006.01)
Patent
CA 1223029
16 ABSTRACT: Electron multiplier element (11) with secondary emission of the "apertured plate" type, characterized in that, on the one hand, it consists of a first plate (12) having holes (13), which are termed multiplier holes, in which each multiplier hole (13) defines on a first surface (14) of the first plate (12) an aperture (15) which is termed input aperture and which is larger than the aperture (16), which is termed output aperture, which is defined on the second surface (17) of the first plate (12), and, on the other hand, consists of a second plate (22) which is parallel to the first plate (12), which also comprises holes (23) which are termed auxiliary holes the aperture (25) of which is situated on a first surface (24) of the second surface (22) opposite to the second surface (17) of the first plate (12), is substan- tially equal to the output aperture (16) of the multiplier holes (13) and is smaller than the aperture (26) of the auxiliary holes (23) which are defined on the second surface (27) of the second plate (22), and that the first plate (12) and second plate (22) are each insulated from each other, the second plate (22) being brought at a potential (V1) which is larger than the potential (Vo) of the first plate (12). These types of elements are intended to be used in photomultiplier tubes.
458201
Photonis
Van Steinburg C.e.
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