Patent ID: 8970099
Filing Date: 2015-03-03
Classification: G01T,H01J

Abstract:
1. An ionization chamber with a built-in temperature sensor, comprising: a cavity; a chamber wall, fixed on a chamber stem and enclosing said cavity to separate and insulate said cavity from an external environment; an outer electrode, substantially being the chamber wall when the chamber wall is made of a conductive material, or substantially being a conductive material coating on an inner surface of the chamber wall when the chamber wall is made of an insulating material; an inner electrode, connected to a cavity signal line and disposed inside the cavity while allowing an end of the inner electrode to fix to an electrode fixture; a guard electrode, disposed on an insulation substrate that is disposed at a position between the outer electrode and the inner electrode while allowing the electrical potentials of the guard electrode and the inner electrode to be maintained at the same level; and a temperature sensor, disposed on an insulation substrate that is disposed at a position between the outer electrode and the guard electrode for detecting temperature inside the cavity in real time while allowing the detected temperature to be outputted via a temperature signal line, wherein the size of the temperature sensor is smaller than 0.05% of an effective collecting volume of the cavity.