Patent ID: 9239394
Filing Date: 2016-01-19
CPC Classification: G01T

Claim Text:
1. A detector unit for detecting ionising radiation, said detector unit comprising: a scintillator selected to emit light in response to incident radiation; at least one detector for detecting said emitted light; at least one optical waveguide for transmitting said emitted light to said detector, wherein said at least one waveguide comprises a tube that includes a flexible hollow optical fibre containing a replaceable scintillator material in the hollow of the optical fibre; a radiation shield including hollow shielding fibers connected to a manifold and pump system operable to selectively introduce and withdraw different shielding materials to and from the hollow shielding fibres; a processor configured to receive output from the at least one detector and determine a type of the incident radiation; and the processor is further configured to select and control the introduction and withdrawal of the different shielding materials based on the type of the incident radiation determined; wherein the light emissions are transmitted to said detector down a central space of the tube by total internal reflection.