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29 July 2010 Soft x-ray imager (SXI) onboard ASTRO-H
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We are designing an X-ray CCD camera (SXI) for ASTRO-H, including many new items. We have developed the CCD, CCD-NeXT4, that is a P-channel type CCD. It has a thick depletion layer of 200μm with an imaging area of 30mm square. Since it is back-illuminated, it has a good low energy response and is robust against the impact of micro-meteorites. We will employ 4 chips to cover the area of 60mm square. A mechanical rather than peltier cooler will be employed so that we can cool the CCD to -120°C. We will also introduce an analog ASIC that is placed very close to the CCD. It performs well, having a similar noise level to that assembled by using individual parts used on SUZAKU. We also employ a modulated X-ray source (MXS), that improves the accuracy of the calibration. The SXI will have one of the largest SΩ among various satellites.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hiroshi Tsunemi, Kiyoshi Hayashida, Takeshi Go Tsuru, Tadayasu Dotani, Junko S. Hiraga, Naohisa Anabuki, Aya Bamba, Isamu Hatsukade, Takayoshi Kohmura, Koji Mori, Hiroshi Murakami, Hiroshi Nakajima, Masanobu Ozaki, Hiroyuki Uchida, and Makoto Yamauchi "Soft x-ray imager (SXI) onboard ASTRO-H", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 773210 (29 July 2010);


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