Patent Number: 6,166,365

Title: Photodetector and method for manufacturing it

Abstract: A photosensor comprises a cathode portion (111) sensitive to radiation and/or particles, an anode portion (114) receiving electrons, an evacuated channel (112, 113, 200) having the cathode portion attached to its one end portion in a vacuum-tight manner and the anode portion attached to its other end portion in a vacuum-tight manner, a conductive or semiconductive layer (107) at least partially covering the inner surface of the evacuated channel, wherein the channel is formed of a tubular member (106). A method of manufacturing a channel electron multiplier comprises the steps of forming a tubular member and a conductive or semiconductive layer at least on parts of its inner surface, forming an anode portion and sealing it to the tubular member, evacuating the tubular member, forming a cathode portion sensitive to radiation and/or particles, and sealing the cathode portion to the evacuated tubular member. The detector may at least partially be packed into a casting compound.

Inventors: Simonetti; John J. (Hamilton Square, NJ), Barden; Raimund (Oestrich-Winkel, DE)

Assignee: Schlumberger Technology Corporation

International Classification: H01J 43/24 (20060101); H01J 43/00 (20060101); H01J 043/04 (); H01J 043/06 ()

Expiration Date: 12/26/2017