Electron multiplier and methods and apparatus for processing the

Details Electron multiplier and methods and apparatus for processing the Electron multiplier and methods and apparatus for processing the

1971-02-22

1999-11-23

Nelson, Peter A.

Electric lamp and discharge devices

Photosensitive

Plural secondary emissive electrodes

313103CM, 313534, H01J 4300

Patent

active

059906014

ABSTRACT:
A channel-type electron multiplier and a method and apparatus for rounding off the sharp circular edges, fissures and protrusions at the ends of the holes in the glass plate. In order to do this a temperature gradient is produced through the plate so that only a small portion is heated above the glass softening temperature. The plate thus does not collapse or melt. The said rounded edges improve performance by reducing field emission, noise and photocathode contamination. An electrically heated nichrome wire provides heat pulses at regular intervals. An alternative method utilizes an optical lap after core glass in the plate holes has been partially etched out.

REFERENCES:
patent: 2537923 (1951-01-01), Van Overbeek
patent: 2773992 (1956-12-01), Ullery
patent: 3201630 (1965-08-01), Orthuber et al.
patent: 3244922 (1966-04-01), Wolfgang
patent: 3424909 (1969-01-01), Rougeot
patent: 3449582 (1969-06-01), Sackinger
patent: 3634712 (1972-01-01), Orthuber

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