Global to push GA events into
skip to main content

Title: Gamma-insensitive optical sensor

An ultra-violet/visible/infra-red gamma-insensitive gas avalanche focal plane array comprising a planar photocathode and a planar anode pad array separated by a gas-filled gap and across which is applied an electric potential. Electrons ejected from the photocathode are accelerated sufficiently between collisions with the gas molecules to ionize them, forming an electron avalanche. The gap acts like a proportional counter. The array of anode pad are mounted on the front of an anode plate and are connected to matching contact pads on the back of the anode via feed through wires. Connection of the anode to signal processing electronics is made from the contact pads using standard indium bump techniques, for example.
Inventors:
 [1]
  1. (Walnut Creek, CA)
Issue Date:
OSTI Identifier:
869194
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
Patent Number(s):
US 5294789
Contract Number:
W-7405-ENG-48
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Country of Publication:
United States
Language:
English
Subject:
gamma-insensitive; optical; sensor; ultra-violet; visible; infra-red; gas; avalanche; focal; plane; array; comprising; planar; photocathode; anode; pad; separated; gas-filled; gap; applied; electric; potential; electrons; ejected; accelerated; sufficiently; collisions; molecules; ionize; forming; electron; proportional; counter; mounted; front; plate; connected; matching; contact; pads; via; feed; wires; connection; signal; processing; electronics; standard; indium; bump; techniques; example; plane array; processing electronics; proportional counter; gas molecules; signal processing; electric potential; focal plane; electron avalanche; optical sensor; sensitive optical; gas-filled gap; signal process; gamma-insensitive optical; gamma-insensitive gas; gas avalanche; planar anode; avalanche focal; /250/