Patent ID: 6885007

Claim:
An apparatus for detecting a radiation beam comprising: a plurality of first radiation detectors forming an array adapted to generate an instantaneous electrical current proportional to the instantaneous radiation rate at the associated one of said radiation detectors; a signal processor connected to said array and located at a distance from said array sufficient to avoid substantial contact with the radiation beam, said signal processor having multiple channels for making measurements of said currents generated by each of said first radiation detectors and to communicate said measurements, each of said channels including an electrometer; a set of second radiation detectors, said set including multiple solid-state radiation detectors connected together in parallel to provide a single electronic signal, said signal being transmitted to said signal processor; a housing having a longitudinal axis, wherein said array of first radiation detectors are ion chambers arranged substantially linearly in said housing to one side of said axis, and said set of second radiation detectors being arranged substantially linearly in said housing to the other side of said axis; a controller communicatively connected to said signal processor and adapted to receive said measurements; a first multi-conductor cable connecting said array to said signal processor; and a second multi-conductor cable and communication interface device, which connects one or more of said electrometers to said controller.