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- W1974057875 abstract "Some recent results associated with the development of tantalum based photon counting superconducting tunnel junctions (STJ) suitable for use as broad-band low resolution spectrometers for optical and ultraviolet astronomy are presented. A m square tantalum based STJ, operated at a temperature of 0.3 K, has demonstrated a limiting resolution of nm at 200 nm and nm at 1000 nm. The device is extremely linear in response with photon energy, and covers the waveband from 200 nm to while measuring the individual photon wavelength and arrival time. The short wavelength limit is currently constrained by the current experimental configuration (a fibre optic) as well as to some extent the sapphire substrate. The estimated quantum efficiency for single photons is over between 200 and 700 nm with a maximum of at 550 nm. Such an STJ when packaged into an array could contribute significantly to many fields of near infrared, optical and ultraviolet astronomy being able to provide efficiently and simultaneously the broad band spectrum and photon arrival time history of every single object in the field over a very wide dynamic range." @default.
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- W1974057875 date "1998-02-01" @default.
- W1974057875 modified "2023-09-27" @default.
- W1974057875 title "Recent developments in superconducting tunnel junctions for ultraviolet, optical & near infrared astronomy" @default.
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- W1974057875 doi "https://doi.org/10.1051/aas:1998116" @default.
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