Patent ID: 6100530
Filing Date: 2000-08-08
Classification: G01T,G01V

Abstract:
An angular time synchronized directional radiation sensor comprising:a stationary photomultiplier tube connected to a radiation sensing means within a housing, said radiation sensing means, being separated from said photomultiplier tube by an air gap;said radiation sensing means, rotating within said housing, said housing being exposed to a radiation source in an unknown location;said radiation sensing means, having a means for transmitting signals disposed on an outer layer and an angle of rotation synchronized with time, performs a 360.degree. scan of said radiation source;said radiation sensing means, having a plurality of flat layers sensitive to said radiation source, emits a plurality of light flashes;said photomultiplier tube converts said plurality of light flashes into a plurality of electrical pulses;a receiving means, having a timer, is disposed within said housing in proximity to said transmitting means;during each rotation of the radiation sensing means, said transmitting means, passing said receiving means, transmits a signal for each of said plurality of electrical pulses to said receiving means;said receiving means resets said timer recording when each of said plurality of light flashes was emitted;said receiving means provides a count output including a time of light flash input to a means for data collection, said time of light flash input indicating the angle where said radiation source is located; andbased on said count output, said data collection means calculates said angle of rotation at a corresponding fraction of said 360.degree. scan to rapidly indicate the direction of said radiation source.