Electron multiplier with improved dynode geometry for reduced crosstalk

• Main Authors: KATO; HISAKI, OZAWA; ITSUO, ONDA; HIROYUKI, UCHINO; TSUGUO, KIMURA; SUENORI, NAKATSUGAWA; KIYOSHI
• Format: Patent
• Language: English
• Published: 02.01.1996
• Edition: 6
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS; ELECTRICITY

The present invention relates to a linear multi-anode photomultiplier or electron multiplier on which a plurality of light beams to be measured or energy beams of electrons, ions and so forth are incident one-dimensionally. The object of the present invention is to prevent crosstalk between dynode arrays caused by leaking electrons. A transmission type photomultiplier is characterized in that the direction of secondary electron emission of the first-stage dynode of each dynode array is set in the opposite direction at 180 DEG from that of an adjacent dynode array. Then, adjacent dynode arrays will not oppose each other but are shifted from each other at a predetermined distance in the lateral direction. Accordingly, even if electrons leak from a gap between dynodes of a certain dynode array, the leaking electrons will not enter the adjacent dynode array, thereby preventing crosstalk.