This general purpose detector allows the characterization of ionizing beams: measurement is performed while the beam crosses the detector. Historically, the development of this technology was triggered by the need of control following the Epinal overexposure accident.
The detector consists of a matrix of ionizations chambers crossed by the beam to be measured. The charges generated in each chamber are collected by in-house sensitive charge integrators, also featuring large dynamics. The set is compact and can easily be adapted depending on the nature of the radiations to be monitored.
The detector is almost transparent to the beam. It allows to completely characterize the beam properties in two dimensions and real time, with more than 250 measurements per second over an area of several hundred of squared centimeters.
The proof of concept has been obtained on XRay photons: measurements performed on radiation therapy beams (6MV) highlighted the prototype capability to detect non conformities. In addition, the analysis of the data collected allows the spatial localization of the discrepancies.
The detector allows traceability on irradiations. It can be declined for quality control of equipments and/or bring improvement on industrial processes. Applied in radiotherapy for instance, it allows a better treatment quality by supplying data, that was, until then non-existent and increases the irradiators occupation rate.