Method and apparatus for radiation detection in a high temperature environment

US7321123B2 · kind B2 · utility

Assignee

• SCHLUMBERGER TECHNOLOGY CORPORATION · US

Inventors

• John J. Simonetti · Hillsborough Township, US
• Joel L. Groves · Leonia, US
• Wolfgang Ziegler · Waldbronn, DE
• Art Liberman · Palo Alto, US
• Christian Stoller · Princeton Junction, US

Key dates

• Filing date: Dec 20, 2005
• Grant date: Jan 22, 2008
• Expiry date: Dec 20, 2025

Classification

• Technology area (CPC G): Physics
• CPC primary: G01T1/20
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

A radiation detector operating at high temperatures is shown comprising a LuAP scintillating material for producing light when excited by incident radiation, a photocathode, and an electron multiplier. The photocathode is deposited directly onto the surface of the scintillating material that is oriented toward the electron multiplier. In a preferred embodiment, a metal flange is hermetically sealed to the scintillating material and this is fusion welded to the electron multiplier to create a vacuum envelope. This invention is particularly useful in high temperature noisy environments such as downhole operations to detect radiation within a well hole.