Abstract
We have developed superconducting tunnel junctions (STJs) for applications to astrophysics, particle physics, material physics, etc. The spectrum capability of STJs is the wide wavelength/energy range from visible light to X-ray. STJs are applicable to photon detectors with good energy resolution and a high photon-counting rate. STJs also have good efficiency because of their high absorption efficiency below 1keV photon energy. This is advantageous in low photon emission observation like fluorescence from objects. STJs have potentials to open new windows of the Multispectral/fluorescence computed tomography (CT) below 1keV photon energy. As first step, we are starting STJ-CT experiments from the high-energy X-ray region (6–20keV). We report and discuss the CT using STJs.
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