Patent Number: 6,169,775

Title: Radiation detecting apparatus

Abstract: A radiation detecting apparatus comprises a container having a vacuum space, a radiation detecting element disposed in the vacuum space for detecting radiation, and a cooling element disposed in the container for cooling the radiation detecting element to a preselected cooling temperature during operation of the radiation detecting apparatus. A physical absorbing material is disposed in the container for absorbing gases from the vacuum space. A chemical absorbing material capable of activation by heat is disposed in the container for absorbing gases from the vacuum space. A heating device is provided for heating the chemical absorbing material. A measurement and control circuit measures a temperature of the radiation detecting element or a degree of vacuum in the vacuum space to determine whether or not the chemical absorbing material should be activated by the heating device.

Inventors: Takahashi; Koji (Chiba, JP), Morita; Mitsukazu (Chiba, JP), Saito; Masaki (Chiba, JP)

Assignee: Seiko Instruments Inc.

International Classification: G01J 5/06 (20060101); G12C 017/00 ()

Expiration Date: 01/02/2018