A new family of swept charge devices (SCDs) for x-ray spectroscopy applications

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

In this paper we discuss the design and performance of a new family of swept charge devices intended for X-ray spectroscopy. The devices were designed to combine large area with good detection efficiency over the 0.5-10 keV band, and, importantly, to be capable of operation at "warm" temperatures, e.g. room temperature. Three types of device have been manufactured ranging in detection area from 5-420 mm2 and the paper discusses the initial characterisation of the detectors over a range of temperatures. Whilst the device leakage current scales with detector area, we demonstrate that the smallest detector is capable of yielding Fano-limited X-ray spectra at room temperature, whereas the largest requires modest cooling down to -20°C to achieve this resolution.

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