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The Engineer - Imaging breakthrough with curved organic x-ray detectors

Materials developed at Surrey University show promise for a new generation of flexible X-ray detectors with potential applications in the medical and security sectors. ....

City Of , United Kingdom , Martin Heeney , Imalka Jayawardena , Prabodhi Nanayakkara , Imperial College London , Surrey University Advanced Technology Institute , Surrey University , Advanced Technology Institute , Professor Martin Heeney , X Ray Detectors , X Ray , Flexible Detectors ,

"X-ray qualification of hydrogenated amorphous silicon sensors on flexi" by M. Menichelli, L. Antognini et al.

Hydrogenated amorphous silicon (a-Si:H) is a well known material for its radiation resistance and for the possibility of deposition on flexible substrates like Polyimide (PI), polyethylene terephthalate (PET) or polyethylene naphthalate (PEN). Due to the properties of a-Si:H its usage for dosimetry, beam monitoring for particle physics and nuclear medicine, as well as, radiation flux measurement for space applications and neutron flux measurement can be foreseen. In this paper the dosimetric X-ray response of p-i-n diodes deposited on Polyimide will be studied. In particular we will study the linearity of the photocurrent response to X-rays versus dose-rate from which we will extract the dosimetric sensitivity at various bias voltages. We will repeat this study for devices having two different areas (2 mm x 2 mm and 5 mm x 5 mm) also a measurement of stability of X-ray response versus time will be shown. ....

Flexible Detectors , Ydrogenated Silicon Detectors , Adiation Hardness ,