Superconducting tunnel junction detectors for ground-based optical astronomy and space-based UV and X-ray astrophysics

Details Superconducting tunnel junction detectors for ground-based optical astronomy and space-based UV and X-ray astrophysics Superconducting tunnel junction detectors for ground-based optical astronomy and space-based UV and X-ray astrophysics

Feb 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aipc..605..559v&link_type=abstract

LOW TEMPERATURE DETECTORS: Ninth International Workshop on Low Temperature Detectors. AIP Conference Proceedings, Volume 605, p

Computer Science

Performance

6

Astronomical And Space-Research Instrumentation, Superconducting Optical, X-Ray, And Gamma-Ray Detectors

Scientific paper

The development and the spectroscopic performance in the UV-NIR and X-ray bands of Ta-based single STJs, small arrays and STJ-absorber structures at the Space Science Department of ESA are discussed. Single NIR photons at E=0.625 eV are detected with δE=79 meV (FWHM) and soft X-ray photons at E=500 eV with ΔE=2.4 eV (FWHM). As a first application S-Cam is described: a cryogenic camera for ground-based optical astronomy exploiting a 6×6 array of Ta STJs. This camera has now undergone four campaigns at the 4.2 m William Herschel Telescope at La Palma (Spain), and future generations of the camera are under active development. For the soft X-ray band (50-3000 eV) a STJ based instrument with an active area of 7×7 mm2 has been proposed as part of the payload of the X-ray Evolving Universe Spectroscopy Mission (XEUS), which is currently under study at ESA. Future developments include devices based on lower Tc superconductors for improved energy resolution as well as larger format detector arrays combined with alternative read-out schemes. .

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