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Proceedings Paper

Development of p-type CCD for the NeXT: the next Japanese x-ray astronomical satellite mission
Author(s): Hideki Ozawa; Masakuni Tohiguchi; Daisuke Matsuura; Emi Miyata; Hiroshi Tsunemi; Shin-ichiro Takagi; Tatsuya Inui; Takeshi Go Tsuru; Yukiko Kamata; Hidehiko Nakaya; Satoshi Miyazaki; Kazuhisa Miyaguchi; Masaharu Muramatsu; Hisanori Suzuki
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Paper Abstract

The next Japanese X-ray astronomical satellite mission, NeXT, was proposed to ISAS/JAXA following the Astro-E2 Suzaku satellite which was launched in July 2005. We develop an X-ray CCD camera system, SXI (Soft X-ray Imager), for NeXT. The Hard X-ray Telescope (HXT) onboard NeXT provides imaging capability up to 80 keV, using the multilayer-coated X-ray mirror technology, called "Supermirror", newly developed in Japan. SXI is one of the focal plane detectors of HXT, which covers the soft energy band in the 0.5-12 keV in the baseline and 0.3-25 keV in the goal. We develop p-type CCDs for the baseline of SXI because p-type CCDs have been successfully used for previous X-ray astronomical satellites. We developed a prototype of a p-type CCD for SXI, called "CCD-NeXT1". CCD-NeXT1 is a frame-transfer CCD with two readout nodes. The image area of CCD-NeXT1 consists of 2Kx2K pixels with a pixel size of 12 μm x 12 μm. We evaluated performance of CCD-NeXT1 devices, KG-4 and KG-5. The energy resolution was 141.8±0.6 eV full width at half maximum at 5.9 keV, the readout noise was 4.7±0.2 e-, the horizontal CTI was < 5.1 x 10-7, and the vertical CTI was < 2.4 x 10-7 for KG-5. The performance of KG-4 was more or less the same as that of KG-5. The thickness of the depletion layer was 82±7 μm for KG-4 and 76±6 μm for KG-5. We conclude that our technology for p-type CCDs is sufficient to satisfy the CCD performance for the baseline of SXI.

Paper Details

Date Published: 15 June 2006
PDF: 9 pages
Proc. SPIE 6266, Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray, 62662N (15 June 2006); doi: 10.1117/12.671216
Show Author Affiliations
Hideki Ozawa, Osaka Univ. (Japan)
Masakuni Tohiguchi, Osaka Univ. (Japan)
Daisuke Matsuura, Osaka Univ. (Japan)
Emi Miyata, Osaka Univ. (Japan)
Hiroshi Tsunemi, Osaka Univ. (Japan)
Shin-ichiro Takagi, Kyoto Univ. (Japan)
Tatsuya Inui, Kyoto Univ. (Japan)
Takeshi Go Tsuru, Kyoto Univ. (Japan)
Yukiko Kamata, National Astronomical Observatory of Japan (Japan)
Hidehiko Nakaya, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Satoshi Miyazaki, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Kazuhisa Miyaguchi, Hamamatsu Photonics K.K. (Japan)
Masaharu Muramatsu, Hamamatsu Photonics K.K. (Japan)
Hisanori Suzuki, Hamamatsu Photonics K.K. (Japan)


Published in SPIE Proceedings Vol. 6266:
Space Telescopes and Instrumentation II: Ultraviolet to Gamma Ray
Martin J. L. Turner; Günther Hasinger, Editor(s)

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