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15 June 2006 Superconducting tunnel junction detectors for soft x-ray astrophysics
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The requirement on energy resolution for detectors in future X-ray satelite missions such as XEUS (X-ray Evolving Universe Spectroscopy mission) is <2eV in the soft x-ray range of 50-2000 eV, with a detection efficiency >80%. In addition, the requirements for field of view and angular resolution demand a detector array of typically 150x150 micron sized pixels in a 30x30 pixel format. DROIDs (Distributed Read Out Imaging Devices), consisting of a superconducting absorber strip with superconducting tunnel junctions (STJs) as read-out devices on either end, can fulfill these requirements. The amplitudes of the two signals from the STJs provide information on the absorption position and the energy of the incoming photon in the absorber. In this paper we present the development status of Ta/Al 1-D DROIDs, as well as the the short term development program that should result in a full size XEUS array.
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P. Verhoeve, R. A. Hijmering, D. D. E. Martin, I. Jerjen, A. Peacock, and R. Venn "Superconducting tunnel junction detectors for soft x-ray astrophysics", Proc. SPIE 6276, High Energy, Optical, and Infrared Detectors for Astronomy II, 627613 (15 June 2006);

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