International Telephone and Telegraph Corporation

John Treagus Balkwill

Adolf R Asam

A linear array of electron multiplier microchannels is formed by fusing a plurality of solid core glass fibers into a rectangular array. A number of arrays is then sandwiched between a pair of glass plate support members fused into a linear arrangement followed by treating to form the electron multiplier. Treatment comprises subjecting the arrangement to an acid etch for removing the core material and hydrogen firing to activate the core walls for secondary electron emission. The apparatus finds application as an ion-electron converter in focal plane mass spectrometers where high electron gain is required.

Strip microchannel electron multiplier array support structure

A glass drawing machine which has a movable oven that permits glass fibers to be drawn to size within a tolerance of .+-. 0.00025 inch.

Glass fiber drawing machine

A channel-type electron multiplier made in the shape of a glass wafer having holes through a central portion thereof, and an imperforate glass border fused to the periphery of the wafer, the wafer glass having a thermal coefficient of expansion less than that of the border glass. In manufacture, a brief fast cooling step aids in the production of a strong, permanent bond between wafer and border.

Growing community of inventors

Saugus, CA, United States of America

John Treagus Balkwill