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Polymer film‐type channel electron multipliers: Their characteristics and comparison with bulk‐type flexible multipliers
Author(s) -
Kishimoto Yoshio,
Hayashi Tomonao,
Hashimoto Masashi,
Ohshima Tsutomu
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070240214
Subject(s) - dynode , materials science , coating , polymer , composite material , secondary emission , dissolution , electron , chemical engineering , electrode , anode , chemistry , physics , quantum mechanics , engineering
Polymer film‐type channel electron multipliers (CEMs) were developed and their characteristics investigated in comparison with bulk‐type flexible CEM. As film‐type CEMs, a paint‐coating‐type CEM and a solvent‐etching‐type CEM were fabricated. The paint‐coating‐type CEM is made by coating a “paint” which is prepared by dissolving in a solvent an electronically conductive polymeric composition having a high secondary electron emission yield. Up to the present study the mean gain of the film‐type CEM, in spite of the lower resistivity of the dynode, seems to be slightly more dependent on the count rate than that of the bulk‐type CEM made of the same material. However, the convenience of fabricating the dynode film by coating the dynode‐forming paint on the internal surface of any shaped tube or a flexible polymer tube would overcome the slight disadvantage mentioned above.