EP 0165119 B1 19891129 - ELECTRON MULTIPLIER DEVICE WITH ELECTRIC FIELD LOCALISATION
Title (en)
ELECTRON MULTIPLIER DEVICE WITH ELECTRIC FIELD LOCALISATION
Publication
Application
Priority
FR 8407142 A 19840509
Abstract (en)
1. An electron multiplier device comprising, in a vacuum tube : - an entrance window (FE), - a succession of plane, parallel electrodes comprising small interconnected parallel bars, capable of secondary electrical emission, each dynode stage (D1 ...) comprising two successive planes (D11 , D12 ...) adapted to intercept the electrical trajectories in the manner of a baffle, the width of the bars, in cross-section, being at most equal to 0.5 mm, - an anode capable of localizing the impact of the secondary electrons at its level, and - means (E1 , Ei , R0 -R3 ) connected to these dynode stages (D1 -D10 ) in order to establish between them an electron accelerating electric field, the general direction of which is perpendicular to the electrodes, characterised in that the distance (Z1 ) between two consecutive dynode stages (D1 -D2 ), which is several times greater than the width of the bars, is selected, depending on the electrical field, in such a manner that the secondary electrons originating from the upstream stage (D1 ), in a concentrated distribution, a restricted number of bars of the downstream stage (D2 ), and in that the distance (Z0 ) between the two successive planes of each dynode stage is substantially equal to a quarter of the distance (Z1 ) between dynode stages and is selected, depending on the electrical field prevailing between these two planes, to avoid the recapture of a secondary electron by this dynode stage.
IPC 1-7
IPC 8 full level
H01J 43/22 (2006.01)
CPC (source: EP US)
H01J 43/22 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0165119 A1 19851218; EP 0165119 B1 19891129; AT E48338 T1 19891215; DE 3574522 D1 19900104; FR 2566175 A1 19851220; FR 2566175 B1 19861010; JP H0421303 B2 19920409; JP S6182646 A 19860426; US 4914351 A 19900403
DOCDB simple family (application)
EP 85400897 A 19850507; AT 85400897 T 19850507; DE 3574522 T 19850507; FR 8407142 A 19840509; JP 9886885 A 19850509; US 73186085 A 19850508