Patent ID: 8692182

Claim:
An apparatus configured to detect radiation at high temperatures in a borehole penetrating the earth, the apparatus comprising: a scintillation material that interacts with the radiation at the high temperatures to generate photons, the scintillation material being one of a hollow cylinder and a longitudinal segment of a hollow cylinder; at least one solid-state photodetector optically coupled to the scintillation material and configured to detect the radiation by detecting the generated photons, the at least one solid-state photodetector including an array of solid-state photodetectors located on an outer radial surface of the hollow cylinder or the longitudinal segment of the hollow cylinder; and at least one optical element disposed between the scintillation material and the at least one solid-state photodetector and configured to concentrate the photons generated in the scintillation material onto the at least one solid-state photodetector.