29 September 2004 Development of a microcalorimeter array for the Diffuse-Intergalactic Oxygen-Surveyor (DIOS) mission
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We are developing a superconducting transition-edge sensor (TES) microcalorimeter array for the Diffuse Intergalactic Oxygen Surveyor (DIOS) mission. DIOS is a relatively small Japanese X-ray mission which will study large-scale distribution of the warm-hot intergalactic medium (WHIM) using OVII and OVIII emission lines. The satellite weighs about 400 kg equipped with a four-reflection X-ray telescope (FXT) and a TES microcalorimeter array (XSA). The design goal of the observing system is an effective area larger than 100 cm2 at the oxygen line energy, a field of view about 50 arcmin square, and an energy resolution about 2 eV in the energy range of 0.3-1 keV. The TES microcalorimeter array provides the large field of view and good energy resolution at the same time. We plan to install an array comprising 16 x 16 pixels with an overall size of 1 cm square, which is cooled with a cryogen-free cooler. Pixels are readout by multiplexing signals using a multi-input SQUID amplifier, with each input connected to a TES microcalorimeter which is AC biased with a different frequency. We report the design and present status of the XSA system development.
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Yoshitaka Ishisaki, Yoshitaka Ishisaki, Takaya Ohashi, Takaya Ohashi, Tai Oshima, Tai Oshima, Umeyo Morita, Umeyo Morita, Keisuke Shinozaki, Keisuke Shinozaki, Kosuke Sato, Kosuke Sato, Kazuhisa Mitsuda, Kazuhisa Mitsuda, Noriko Y. Yamasaki, Noriko Y. Yamasaki, Ryuichi Fujimoto, Ryuichi Fujimoto, Yoh Takei, Yoh Takei, Hirotaka Sato, Hirotaka Sato, Noriyuki Takahashi, Noriyuki Takahashi, Takayuki Homma, Takayuki Homma, Tetsuya Osaka, Tetsuya Osaka, } "Development of a microcalorimeter array for the Diffuse-Intergalactic Oxygen-Surveyor (DIOS) mission", Proc. SPIE 5501, High-Energy Detectors in Astronomy, (29 September 2004); doi: 10.1117/12.551398; https://doi.org/10.1117/12.551398


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