Distributed Read-Out Imaging Devices for X-ray Imaging Spectroscopy

摘要

We present an experimetnal study of the performance of distributed Read-Out Imaging Devices (DROIDs), 1- and 2- dimensional photon-counting imaging spectrometes, based on Ta/Al-based STJs placed on a Ta absorber. Results obtained with highly collimated illumination with 10 keV X-ray photons clearly demonstrate the imaging capabilities of 2-dimensional DROIDs. The derived spatial FWHM resolution is 7 mu m for a 200 x 200 mu m~2 absorber. With a 1-D DROID we have measured an intrinsic energy resolution of 15 eV FWHM for 6 keV photons. At high energies (E>6 keV) the resolution is limited y spatial fluctuations in the qp recombination rate.