A prototype microchannel electron multplier has been tested for use in a satellite-borne mass spectrometer to be flown on the GIOTTO cometary mission. In the mass spectrometer application position, information is obtained both from discrete anodes deposited on the back face of the microchannel plate (contact anodes), as well as from discrete remote anodes. Pulse height distributions from remote and contact anodes are found to be comparable. Crosstalk between contact anodes, although acceptably low, was larger than expected for the amplifier gain, bandwidth, and integration periods used. Scans across the plate were made using a highly collimated beam of electrons that was small with respect to the channel diameter, allowing the boresighted response to be determined. The electron beam intensity was varied to measure gain G(n) and depression versus count rate n for single channel excitation.
Microchannel plate electron multiplier for mass spectrometer applications
Mikrokanalplatten -Elektrnenvervielfacher fuer die Verwendung in Massenspektrometern
IEEE Transactions on Nuclear Science ; 31 , 1 ; 780-785
1984
6 Seiten, 8 Bilder, 1 Tabelle, 6 Quellen
Article (Journal)
English
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