Dr. Yasushi Ogasaka Profile

Dr. Yasushi Ogasaka

Deputy Manager/JST Program Officer at Japan Science and Technology Agency

SPIE Involvement:

Author

Publications (67)

SPIE Journal Paper | 27 January 2018

On-ground calibration of the Hitomi Hard X-ray Telescopes

Hideyuki Mori, Takuya Miyazawa, Hisamitsu Awaki, Hironori Matsumoto, Yasunori Babazaki, Ayako Bandai, Tadatsugu Demoto, Akihiro Furuzawa, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Manabu Ishida, Naoki Ishida, Masayuki Itoh, Toshihiro Iwase, Hiroyoshi Kato, Hiroaki Kobayashi, Tatsuro Kosaka, Hideyo Kunieda, Shou Kurashima, Daichi Kurihara, Yuuji Kuroda, Yoshitomo Maeda, Yoshifumi Meshino, Ikuyuki Mitsuishi, Yusuke Miyata, Hosei Nagano, Yoshiharu Namba, Yasushi Ogasaka, Keiji Ogi, Takashi Okajima, Shigetaka Saji, Fumiya Shimasaki, Takuro Sato, Toshiki Sato, Naotsugu Shima, Satoshi Sugita, Yoshio Suzuki, Kenji Tachibana, Sasagu Tachibana, Shunya Takizawa, Keisuke Tamura, Yuzuru Tawara, Kazuki Tomikawa, Tatsuharu Torii, Kentaro Uesugi, Koujun Yamashita, Shigeo Yamauchi

JATIS, Vol. 4, Issue 01, 011210, (January 2018) https://doi.org/10.1117/12.10.1117/1.JATIS.4.1.011210

KEYWORDS: X-rays, Mirrors, Calibration, X-ray imaging, X-ray telescopes, Sensors, Hard x-rays, Spatial resolution, Vignetting, Reflectivity

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Proceedings Article | 19 July 2016 Paper

Paper

Ray-tracing simulation and in-orbit performance of the ASTRO-H hard x-ray telescope (HXT)

H. Matsumoto, H. Awaki, A. Furuzawa, M. Ishida, H. Kunieda, Y. Haba, T. Hayashi, R. Iizuka, K. Ishibashi, M. Itoh, T. Kosaka, Y. Maeda, I. Mitsuishi, T. Miyazawa, H. Mori, H. Nagano, Y. Namba, Y. Ogasaka, K. Ogi, T. Okajima, S. Sugita, Y. Suzuki, K. Tamura, Y. Tawara, K. Uesugi, S. Yamauchi

Proceedings Volume 9905, 990541 (2016) https://doi.org/10.1117/12.2232135

KEYWORDS: X-rays, Device simulation, Hard x-rays, X-ray telescopes, Hard x-rays, Space telescopes, Wind energy, Synchrotron technology, Ultraviolet telescopes, Satellites, Synchrotrons

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Proceedings Article | 18 July 2016 Paper

Paper

Performance of ASTRO-H hard x-ray telescope (HXT)

Hisamitsu Awaki, Hideyo Kunieda, Manabu Ishida, Hironori Matsumoto, Akihiro Furuzawa, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Masayuki Itoh, Tatsuro Kosaka, Yoshitomo Maeda, Ikuyuki Mitsuishi, Takuya Miyazawa, Hideyuki Mori, Hosei Nagano, Yoshiharu Namba, Yasushi Ogasaka, Keiji Ogi, Takashi Okajima, Satoshi Sugita, Yoshio Suzuki, Keisuke Tamura, Yuzuru Tawara, Kentaro Uesugi, Shigeo Yamauchi

Proceedings Volume 9905, 990512 (2016) https://doi.org/10.1117/12.2231258

KEYWORDS: Hard x-rays, Calibration, X-ray telescopes, Imaging systems, Satellites, Mirrors, X-rays, Wind energy, Reflectors, Space telescopes

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Proceedings Article | 24 July 2014 Paper

Paper

ASTRO-H Hard X-ray Telescope (HXT)

Hisamitsu Awaki, Hideyo Kunieda, Akihiro Furuzawa, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Manabu Ishida, Masayuki Itoh, Tatsuro Kosaka, Yoshitomo Maeda, Hironori Matsumoto, Takuya Miyazawa, Hideyuki Mori, Hosei Nagano, Yoshiharu Namba, Yasushi Ogasaka, Keiji Ogi, Takashi Okajima, Satoshi Sugita, Yoshio Suzuki, Keisuke Tamura, Yuzuru Tawara, Kentaro Uesugi, Koujun Yamashita, Shigeo Yamauchi

Proceedings Volume 9144, 914426 (2014) https://doi.org/10.1117/12.2054633

KEYWORDS: X-ray telescopes, X-rays, Reflectors, Hard x-rays, Mirrors, Space telescopes, X-ray imaging, Calibration, Telescopes, Aluminum

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Proceedings Article | 17 September 2012 Paper

Paper

Current status of ASTRO-H Hard X-ray Telescopes (HXTs)

Hisamitsu Awaki, Hideyo Kunieda, Akihiro Furuzawa, Yoshito Haba, Takayuki Hayashi, Ryo Iizuka, Kazunori Ishibashi, Manabu Ishida, Masayuki Itoh, Tatsuro Kosaka, Yoshitomo Maeda, Hironori Matsumoto, Takuya Miyazawa, Hideyuki Mori, Hosei Nagano, Yoshiharu Namba, Yasushi Ogasaka, Keiji Ogi, Takashi Okajima, Satoshi Sugita, Yoshio Suzuki, Keisuke Tamura, Yuzuru Tawara, Kentaro Uesugi, Koujun Yamashita, Shigeo Yamauchi

Proceedings Volume 8443, 844324 (2012) https://doi.org/10.1117/12.926753

KEYWORDS: Mirrors, X-rays, X-ray telescopes, Reflectors, Hard x-rays, Telescopes, Space telescopes, Aluminum, Multilayers, X-ray imaging

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Proceedings Article | 30 July 2010 Paper

Paper

Current status of hard x-ray characterization of ASTRO-H HXT at SPring-8

Takuya Miyazawa, Akihiro Furuzawa, Yasufumi Kanou, Kenji Matsuda, Michito Sakai, Nobuyuki Yamane, Yosuke Ishida, Shinji Hara, Yusuke Miyata, Karin Sakanobe, Yoshito Haba, Hironori Matsumoto, Yuzuru Tawara, Hideyo Kunieda, Hideyuki Mori, Keisuke Tamura, Yoshitomo Maeda, Manabu Ishida, Hisamitsu Awaki, Takashi Okajima, Kentaro Uesugi, Yoshio Suzuki, Naoki Ishida, Nobuhiro Ohtsu, Akio Suzuki, Yasushi Ogasaka, Koujun Yamashita

Proceedings Volume 7732, 77323I (2010) https://doi.org/10.1117/12.857421

KEYWORDS: Reflectors, Hard x-rays, X-ray telescopes, X-rays, X-ray imaging, Imaging systems, Sensors, Space telescopes, Telescopes, X-ray optics

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Proceedings Article | 29 July 2010 Paper

Paper

Hard x-ray telescope to be onboard ASTRO-H

Hideyo Kunieda, Hisamitsu Awaki, Akihiro Furuzawa, Yoshito Haba, Ryo Iizuka, Kazunori Ishibashi, Manabu Ishida, Masayuki Itoh, Tatsuro Kosaka, Yoshitomo Maeda, Hironori Matsumoto, Takuya Miyazawa, Hideyuki Mori, Yoshiharu Namba, Yasushi Ogasaka, Keiji Ogi, Takashi Okajima, Yoshio Suzuki, Keisuke Tamura, Yuzuru Tawara, Kentato Uesugi, Koujun Yamashita, Shigeo Yamauchi

Proceedings Volume 7732, 773214 (2010) https://doi.org/10.1117/12.856892

KEYWORDS: Reflectors, X-rays, Mirrors, Hard x-rays, X-ray telescopes, Stray light, Calibration, Aluminum, Space telescopes, Telescopes

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Proceedings Article | 4 September 2009 Paper

Paper

Improvement of the angular resolution of a thin-foil-nested x-ray telescope

Takayuki Hayashi, Takuro Sato, Manabu Ishida, Yoshitomo Maeda, Hideyuki Mori, Ryoko Nakamura, Takayuki Shirata, Kentaro Someya, Yasushi Ogasaka, Kenichi Torii

Proceedings Volume 7448, 74480A (2009) https://doi.org/10.1117/12.826291

KEYWORDS: Reflectors, Spatial resolution, X-rays, X-ray telescopes, Optical alignment, Epoxies, Gold, Mirrors, Sensors, Manufacturing

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We have been developing a thin-foil-nested X-ray telescope (XRT) for the Japanese X-ray astronomy satellites since ASCA launched in 1993. The thin-foil-nested XRT is advantageous in realizing high throughput with a light weight, whilst its angular resolution is poorer than other mirrors using, for example, a polished thick glass substrate onboard Chandra. We have investigated causes of image degradation of our XRT, and have identified them as figure error and positioning error of the reflectors. Since the latter dominates the entire error budget, we first attempted to improve the positioning error, and adopted the following two methods. First, we substituted an alignment plate for the alignment bar. The alignment plate incorporates the independently movable four alignment bars adopted for ASCA and Suzaku into a single plate. In practice, we allocated a pair of the plate in each slot, and after inserting all the reflectors, we shifted one of the plates radially to tightly hold the reflectors. Second, we have manufactured a partially replicated foil in which reflecting material (Au) is not applied to the axial edges of the foils in order to control the foil position by the edges of the reflectors whose thickness variation is within 2 μm. After these improvements on the positioning error, we moved onto the figure error issue. With X-ray and laser profilometer measurements, we found that the figure error increased in a area closer to the azimuthal edges of the reflector. After considerable struggle for improvement, we finally decided to produce a long reflector and to cut both azimuthal edges. Thanks to these new devices, we have reduced the positioning error from 1.5 arcmin to 0.66. Furthermore, we have successfully produced 40-pairs of reflectors whose figure error is less than 0.8 arcmin. Incorporating these reflectors into a mirror housing, we have measured the XRT performance in the 30 m beamline facility at ISAS/JAXA, and confirmed to achieve an angular resolution of 1.08 arcmin in half-power diameter. The effective area is measured to be 14.0 cm², which is ~90% of the designed value. Note that this number is significantly enhanced from ~80% in the Suzaku XRT, which is a by-product of the improvement of the angular resolution.

Proceedings Article | 1 September 2009 Paper

Paper

Recent results from hard x-ray telescope characterization at SPring-8

Takuya Miyazawa, Yasushi Ogasaka, Tomonaga Iwahara, Yasufumi Kanou, Youta Makinae, Shiori Sasaya, Takuya Ohgi, Kenji Matsuda, Michito Sakai, Daisuke Niki, Yousuke Ishida, Koudai Yamane, Akihiro Furuzawa, Yoshito Haba, Hideyo Kunieda, Koujun Yamashita, Kentaro Uesugi, Yoshio Suzuki, Keisuke Tamura, Yoshitomo Maeda, Manabu Ishida, Takashi Okajima

Proceedings Volume 7437, 74371P (2009) https://doi.org/10.1117/12.826725

KEYWORDS: Hard x-rays, Reflectors, X-ray telescopes, Mirrors, Telescopes, X-rays, Image quality, Space telescopes, Reflector telescopes, Multilayers

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Proceedings Article | 31 August 2009 Paper

Paper

The current status of ASTRO-H/HXT development facility

Akihiro Furuzawa, Yasushi Ogasaka, Hideyo Kunieda, Takuya Miyazawa, Masato Sakai, Yosuke Kinoshita, Youta Makinae, Shiori Sasaya, Yasufumi Kanou, Daisuke Niki, Takuya Ohgi, Nodoka Oishi, Koudai Yamane, Nobuyuki Yamane, Yosuke Ishida, Yoshito Haba, Yuzuru Tawara, Koujun Yamashita, Manabu Ishida, Yoshitomo Maeda, Hideyuki Mori, Keisuke Tamura, Hisamitsu Awaki, Takashi Okajima

Proceedings Volume 7437, 743709 (2009) https://doi.org/10.1117/12.825771

KEYWORDS: Reflectors, Hard x-rays, Telescopes, X-ray telescopes, X-rays, Glasses, Space telescopes, Reflector telescopes, Mirrors, X-ray imaging

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Proceedings Article | 31 August 2009 Paper

Paper

Current status of the Astro-H X-ray Telescope system

Hisamitsu Awaki, Yasushi Ogasaka, Hideyo Kunieda, Akihiro Furuzawa, Hideyuki Mori, Takuya Miyazawa, Yoshito Haba, Yuzuru Tawara, Koujun Yamashita, Peter Serlemitsos, Yang Soong, Takashi Okajima, Manabu Ishida, Yoshitomo Maeda, Keisuke Tamura, Yoshiharu Namba, Kentaro Uesugi, Yoshio Suzuki, Keiji Ogi, Masayuki Itoh, Tatsuro Kosaka, Hiroshi Tsunemi

Proceedings Volume 7437, 743703 (2009) https://doi.org/10.1117/12.826004

KEYWORDS: Reflectors, X-ray telescopes, Mirrors, Glasses, Telescopes, X-rays, Reflectivity, Hard x-rays, Sensors, Space telescopes

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Proceedings Article | 15 July 2008 Paper

Paper

Soft x-ray mirrors onboard the NeXT satellite

Takashi Okajima, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Rob Petre, Yasushi Ogasaka, Takuya Miyazawa, Akihiro Furuzawa, Hideyo Kunieda, Manabu Ishida, Yoshitomo Maeda, Keisuke Tamura, Hideyuki Mori, Hisamitsu Awaki

Proceedings Volume 7011, 70112X (2008) https://doi.org/10.1117/12.789599

KEYWORDS: Reflectors, Mirrors, X-ray telescopes, X-rays, Epoxies, Aluminum, Spatial resolution, Space telescopes, Imaging spectroscopy, Point spread functions

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Proceedings Article | 15 July 2008 Paper

Paper

Soft x-ray calibration for the NeXT x-ray telescope

Yoshitomo Maeda, Takayuki Hayashi, Hideyuki Mori, Ryoko Nakamura, Takuro Satoh, Akiko Sekiguchi, Kentaro Someya, Kensuke Tamura, Manabu Ishida, Takeyuki Osawa, Takayuki Shirata, Masaki Suzuki, Yasushi Ogasaka, Akihiro Furuzawa, Yoshito Haba, Takuya Miyazawa, Hideyo Kunieda, Koujun Yamashita, Takashi Okajima

Proceedings Volume 7011, 70112O (2008) https://doi.org/10.1117/12.788652

KEYWORDS: X-rays, Calibration, X-ray telescopes, Raster graphics, Reflectors, Telescopes, Mirrors, Sensors, Point spread functions, Solids

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Proceedings Article | 15 July 2008 Paper

Paper

Hard x-ray imaging system for XEUS

Hideyo Kunieda, Tadayuki Takahashi, Motohide Kokubun, Kazuhiro Nakazawa, Yasushi Ogasaka

Proceedings Volume 7011, 70110D (2008) https://doi.org/10.1117/12.787421

KEYWORDS: Hard x-rays, Sensors, Imaging systems, X-rays, Silicon, X-ray telescopes, Absorption, Mirrors, Image sensors, Spatial resolution

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Proceedings Article | 15 July 2008 Paper

Paper

Hard x-ray characterization of the NeXT hard x-ray telescopes at SPring-8

Takuya Miyazawa, Yasushi Ogasaka, Tomonaga Iwahara, Yasufumi Kanou, Naoki Sasaki, Youta Makinae, Shiori Sasaya, Yuuki Inukai, Akihiro Furuzawa, Yoshito Haba, Hideyo Kunieda, Koujun Yamashita, Kentaro Uesugi, Yoshio Suzuki, Keisuke Tamura, Yoshitomo Maeda, Manabu Ishida, Takashi Okajima

Proceedings Volume 7011, 70112P (2008) https://doi.org/10.1117/12.788606

KEYWORDS: Hard x-rays, X-ray telescopes, X-rays, Calibration, Telescopes, Space telescopes, Point spread functions, Synchrotron radiation, Imaging systems, Sensors

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Proceedings Article | 15 July 2008 Paper

Paper

Design of the pre-collimator for the NeXT x-ray telescopes

Hideyuki Mori, Yasushi Ogasaka, Manabu Ishida, Yoshitomo Maeda, Keisuke Tamura, Hideyo Kunieda, Akihiro Furuzawa, Yoshito Haba, Takuya Miyazawa, Koujun Yamashita, Hisamitsu Awaki, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Takashi Okajima

Proceedings Volume 7011, 70112W (2008) https://doi.org/10.1117/12.789184

KEYWORDS: Reflection, X-rays, Stray light, Mirrors, X-ray telescopes, Reflectors, Sensors, Telescopes, X-ray detectors, Optical instrument design

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Proceedings Article | 15 July 2008 Paper

Paper

Design study of telescope housing for the NeXT/XRT

Hisamitsu Awaki, Keiji Ogi, Takashi Okajima, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Yasushi Ogasaka, Takuya Miyazawa, Akihiro Furuzawa, Hideyo Kunieda, Yuzuru Tawara, Manabu Ishida, Yoshitomo Maeda, Hideyuki Mori, Kensuke Tamura

Proceedings Volume 7011, 70112Q (2008) https://doi.org/10.1117/12.788788

KEYWORDS: Finite element methods, X-ray telescopes, Optical instrument design, Space telescopes, X-rays, Telescopes, Aluminum, X-ray imaging, Hard x-rays, Mirrors

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Proceedings Article | 15 July 2008 Paper

Paper

High-energy sky observation by two small satellites using formation flight (FFAST)

Hiroshi Tsunemi, Kiyoshi Hayashida, Hideyo Kunieda, Yasushi Ogasaka, Masayuki Itoh, Masanobu Ozaki, Isao Kawano

Proceedings Volume 7011, 70112D (2008) https://doi.org/10.1117/12.788135

KEYWORDS: Satellites, Charge-coupled devices, Mirrors, Sensors, X-rays, Telescopes, Scintillators, X-ray telescopes, Space telescopes, Photons

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We are planning to have a "formation flight all sky telescope"~(FFAST) that will cover a large sky area in relatively high energy X-ray. In particular, it will focus on the energy range above 10 keV. It consists of two small satellites that will go in a formation flight. One is an X-ray telescope satellite and the other is a detector satellite. Two satellites will be simultaneously launched by a single rocket vehicle into a low earth orbit. They are in a formation flight with a separation of 20m±10cm. The observation direction is determined by the two satellites. Since two satellites are put into Keplerian orbit, the observation direction is scanning the sky rather than pointing to a fixed direction. The X-ray telescope satellite carries one super-mirror covering the energy range up to 80 keV. The telescope is 45-cm diameter and its focal length is 20m. The telescope is a "super mirror" ~that has a multi-layer coating covering the energy range up to 80 keV. The effective area is about 500cm² at low energy and 200cm² at 70 keV. The mirror system is a thin foil mirror that is developing at Nagoya University that is being developed. The PSF of the mirror will be about 1-2 arcmin. The satellite is equipped with an attitude control system using momentum wheel. It will keep the satellite such that the optical axis of the mirror is pointing to the detector satellite. The other is a detector satellite that carries an SDCCD system. The SDCCD is a CCD with a scintillator that is directly attached to the CCD. The CCD chip is fully depleted which can be a back-illuminated CCD. The scintillator is attached to the CCD at back side so that it has high detection efficiency for visible photons generated inside the scintillator. The X-ray enters into the CCD at front side. Therefore, low energy X-rays (below 10 keV) can be photo-absorbed in the depletion layer of the CCD while high energy X-rays will be absorbed in the scintillator that will emit visible photons The visible photons can be detected by the CCD. Depletion layer events usually form small charge spread while scintillator events usually form large charge spread. These events generate charge spread in a symmetric form with different size. On the contrary, charged particles leave an elongated charge spread that can be distinguished from X-ray events by pattern recognition. This project, Formation Flight All Sky Telescope (FFAST), will scan a large sky area at hard X-ray region.

Proceedings Article | 15 July 2008 Paper

Paper

The NeXT Mission

Tadayuki Takahashi, Richard Kelley, Kazuhisa Mitsuda, Hideyo Kunieda, Robert Petre, Nicholas White, Tadayasu Dotani, Ryuichi Fujimoto, Yasushi Fukazawa, Kiyoshi Hayashida, Manabu Ishida, Yoshitaka Ishisaki, Motohide Kokubun, Kazuo Makishima, Katsuji Koyama, Greg Madejski, Koji Mori, Richard Mushotzky, Kazuhiro Nakazawa, Yasushi Ogasaka, Takaya Ohashi, Masanobu Ozaki, Hiroyasu Tajima, Makoto Tashiro, Yukikatsu Terada, Hiroshi Tsunemi, Takeshi Go Tsuru, Yoshihiro Ueda, Noriko Yamasaki, Shin Watanabe

Proceedings Volume 7011, 70110O (2008) https://doi.org/10.1117/12.789640

KEYWORDS: Sensors, X-rays, Hard x-rays, X-ray telescopes, X-ray imaging, Spectroscopy, Spatial resolution, Imaging systems, Iron, X-ray detectors

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Proceedings Article | 15 July 2008 Paper

Paper

The NeXT x-ray telescope system: status update

Yasushi Ogasaka, Hideyo Kunieda, Takuya Miyazawa, Peter Serlemitsos, Yang Soong, Takashi Okajima, Yoshitomo Maeda, Hideyuki Mori, Manabu Ishida, Hisamitsu Awaki, Akihiro Furuzawa, Yoshiharu Namba, Kentaro Uesugi, Yoshio Suzuki, Yoshito Haba, Keisuke Tamura, Hiroshi Tsunemi, Koujun Yamashita, Masayuki Itoh

Proceedings Volume 7011, 70110P (2008) https://doi.org/10.1117/12.788736

KEYWORDS: Mirrors, X-ray telescopes, Reflectors, X-rays, Hard x-rays, X-ray imaging, Reflectivity, Image quality, Point spread functions, Aluminum

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Proceedings Article | 3 October 2007 Paper

Paper

Thin-foil multilayer-supermirror hard x-ray telescopes for InFOCuS/SUMIT balloon experiments and NeXT satellite program

Yasushi Ogasaka, Keisuke Tamura, Takuya Miyazawa, Yoshihiro Fukaya, Tomonaga Iwahara, Naoki Sasaki, Akihiro Furuzawa, Yoshito Haba, Yasufumi Kanou, Daisuki Ueno, Hideyo Kunieda, Koujun Yamashita, Ryo Shibata, Takashi Okajima, Jack Tueller, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Emi Miyata, Hiroshi Tsunemi, Kentaro Uesugi, Yoshio Suzuki, Yoshiharu Namba

Proceedings Volume 6688, 668803 (2007) https://doi.org/10.1117/12.733694

KEYWORDS: Reflectors, X-ray telescopes, Hard x-rays, Image quality, Telescopes, Satellites, Error analysis, Space telescopes, Mirrors, X-rays

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Proceedings Article | 20 September 2007 Paper

Paper

Characterization of Pt/C multilayer at 200 keV soft gamma-ray

Yasushi Ogasaka, Tomonaga Iwahara, Takuya Miyazawa, Yoshihiro Fukaya, Naoki Sasaki, Keisuke Tamura, Yasufumi Kanou, Hideyo Kunieda, Koujun Yamashita

Proceedings Volume 6688, 66880S (2007) https://doi.org/10.1117/12.733614

KEYWORDS: Reflectivity, X-rays, Gamma radiation, Multilayers, Telescopes, Reflection, Space telescopes, X-ray optics, Optical instrument design, Astronomy

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Proceedings Article | 15 June 2006 Paper

Paper

Development of position sensitive scintillation counter for balloon-borne hard x-ray telescope

Keisuke Tamura, Hideyo Kunieda, Yasushi Ogasaka, Akihiro Furuzawa, Ryo Shibata, Tomokazu Nakamura, Katsuhiko Ohnishi, Yasufumi Kanou, Emi Miyata, Hiroshi Tsunemi

Proceedings Volume 6266, 62663R (2006) https://doi.org/10.1117/12.671543

KEYWORDS: Sensors, Hard x-rays, X-ray telescopes, Scintillation, Space telescopes, Scintillators, X-rays, Telescopes, Synchrotron radiation, Photomultipliers

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Proceedings Article | 15 June 2006 Paper

Paper

Development and performance of the advanced hard x-ray telescope for the balloon experiment

Takuya Miyazawa, Ryo Shibata, Yasushi Ogasaka, Yoshihiro Fukaya, Masataka Naitou, Tomonaga Iwahara, Kenta Shimoda, Keisuke Tamura, Akihiro Furuzawa, Hideyo Kunieda, Koujun Yamashita, Shin Yokoi, Takuma Yoshii, Naoya Watanabe, Yoshiharu Namba

Proceedings Volume 6266, 62663C (2006) https://doi.org/10.1117/12.671346

KEYWORDS: Reflectors, Hard x-rays, Telescopes, X-ray telescopes, Reflector telescopes, Image quality, Space telescopes, X-rays, Reflectivity, Reflection

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Proceedings Article | 15 June 2006 Paper

Paper

Design and technology review of the x-ray telescope system onboard NeXT mission

Yasushi Ogasaka, Keisuke Tamura, Ryo Shibata, Takashi Okajima, Akihiro Furuzawa, Hideyo Kunieda, Yoshitomo Maeda, Manabu Ishida, Hisamitsu Awaki

Proceedings Volume 6266, 626615 (2006) https://doi.org/10.1117/12.671341

KEYWORDS: X-ray telescopes, Reflectors, Telescopes, Hard x-rays, Image quality, Reflectivity, X-rays, Space telescopes, Mirrors, Reflector telescopes

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Proceedings Article | 15 June 2006 Paper

Paper

Performance characterization of hard x-ray imaging instruments at synchrotron radiation facility SPring-8

Yasushi Ogasaka, Keisuke Tamura, Ryo Shibata, Akihiro Furuzawa, Tomokazu Nakamura, Masataka Naitou, Takuya Miyazawa, Kenta Shimoda, Katsuhiko Onishi, Yoshihiro Fukaya, Tomonaga Iwahara, Yasushi Kanou, Hideyo Kunieda, Koujun Yamashita, Emi Miyata, Kenji Mukai, Kazuhiro Ikegami, Michihiko Aono, Hiroshi Tsunemi, Kentaro Uesugi, Yoshio Suzuki

Proceedings Volume 6266, 62663T (2006) https://doi.org/10.1117/12.671232

KEYWORDS: Hard x-rays, X-ray telescopes, X-rays, Calibration, Charge-coupled devices, Space telescopes, Synchrotron radiation, Synchrotrons, Imaging systems, Scintillation

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Proceedings Article | 15 June 2006 Paper

Paper

Measurements of reflectivity of x-ray mirror for Suzaku satellite

Keisuke Tamura, Yasushi Ogasaka, Masataka Naitou, Yoshitomo Maeda, Masatoshi Ebara, Akiharu Itoh, Ryo Iizuka, Yushi Yokoyama

Proceedings Volume 6266, 62663D (2006) https://doi.org/10.1117/12.671474

KEYWORDS: X-rays, Reflectivity, Gold, Mirrors, Absorption, X-ray telescopes, Satellites, Argon, Molybdenum, X-ray astronomy

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Proceedings Article | 15 June 2006 Paper

Paper

Development of the scintillator-deposited charge-coupled device and application for the balloon-borne experiment: SUMIT

E. Miyata, K. Mukai, K. Ikegami, N. Tawa, N. Anabuki, H. Tsunemi, Y. Ogasaka, K. Tamura, A. Furuzawa, R. Shibata, Y. Haba, H. Kunieda, Y. Saito, T. Yamagami, K. Miyaguchi

Proceedings Volume 6266, 62662S (2006) https://doi.org/10.1117/12.671018

KEYWORDS: Charge-coupled devices, X-rays, Photons, Scintillators, Hard x-rays, Bismuth, Signal processing, Sensors, Visible radiation, X-ray telescopes

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Proceedings Article | 13 June 2006 Paper

Paper

The demonstration model of four-stage x-ray telescope for DIOS mission

Y. Tawara, I. Sakurai, A. Furuzawa, Y. Ogasaka, K. Tamura, R. Shibata, T. Miyazawa, Y. Fukaya, T. Masuda, T. Torii, M. Sakashita

Proceedings Volume 6266, 62661E (2006) https://doi.org/10.1117/12.670771

KEYWORDS: Mirrors, X-ray telescopes, Optical alignment, Platinum, Nickel, Reflectivity, X-rays, Alignment procedures, Aluminum, Gold

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Proceedings Article | 13 June 2006 Paper

Paper

Replication of Wolter I shaped surface on a two-stage thin-foil substrate

Hisamitsu Awaki, Kazunori Heike, Kazumitsu Okamoto, Yasushi Ogasaka

Proceedings Volume 6266, 62661D (2006) https://doi.org/10.1117/12.670628

KEYWORDS: Reflectors, Image quality, Glasses, Point spread functions, X-rays, Collimation, Mirrors, Telescopes, Epoxies, Spatial resolution

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Proceedings Article | 15 October 2005 Paper

Paper

Design and fabrication of multifoil hard x-ray telescope for space observations

Yasushi Ogasaka, Koujun Yamashita, Ryo Shibata, Keisuke Tamura

Proceedings Volume 5962, 59621T (2005) https://doi.org/10.1117/12.625116

KEYWORDS: X-ray telescopes, Space telescopes, Hard x-rays, X-rays, Reflectivity, Reflectors, Reflection, Telescopes, Image quality, Observatories

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Proceedings Article | 8 September 2005 Paper

Paper

Development of a four-stage x-ray telescope for DIOS mission

Yuzuru Tawara, Machiko Sakashita, Akihiro Furuzawa, Yasushi Ogasaka, Ryo Shibata, Keisuke Tamura, Takuya Miyazawa, Rika Takahashi, Kenta Shimoda, Chiaki Sakai

Proceedings Volume 5900, 59000J (2005) https://doi.org/10.1117/12.615844

KEYWORDS: Mirrors, X-ray telescopes, X-rays, Optical instrument design, Satellites, Spatial resolution, Oxygen, Aluminum, Epoxies, Nickel

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Proceedings Article | 8 September 2005 Paper

Paper

Formation Flight All Sky Telescope (FFAST)

Hiroshi Tsunemi, Ken'ichi Torii, Emi Miyata, Masaharu Nomachi, Hideyo Kunieda, Yasushi Ogasaka, Masayuki Itoh

Proceedings Volume 5900, 59000O (2005) https://doi.org/10.1117/12.616809

KEYWORDS: Satellites, Mirrors, Hard x-rays, Charge-coupled devices, Sensors, X-rays, Scintillators, X-ray telescopes, Telescopes, X-ray detectors

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Proceedings Article | 8 September 2005 Paper

Paper

Characterization of a hard-x-ray telescope at a synchrotron facility

Y. Ogasaka, R. Shibata, K. Tamura, A. Furuzawa, R. Takahashi, T. Miyazawa, M. Sakashita, C. Sakai, K. Shimoda, N. Yamada, Y. Fukaya, H. Kunieda, K. Yamashita, E. Miyata, K. Uesugi, Y. Suzuki

Proceedings Volume 5900, 59000F (2005) https://doi.org/10.1117/12.616546

KEYWORDS: X-ray telescopes, Hard x-rays, Telescopes, X-rays, Space telescopes, Synchrotrons, X-ray optics, Point spread functions, Imaging systems, Sensors

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Proceedings Article | 1 September 2005 Paper

Paper

Development of x-ray mirrors for x-ray telescopes

Keisuke Tamura, Chiaki Sakai, Nubuaki Yamada, Yasushi Ogasaka, Ryo Shibata

Proceedings Volume 5900, 590005 (2005) https://doi.org/10.1117/12.616595

KEYWORDS: Reflectivity, Mirrors, X-rays, X-ray telescopes, Platinum, Composites, Nickel, Sputter deposition, Absorption, Ion beams

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Proceedings Article | 1 September 2005 Paper

Paper

First light of a hard-x-ray imaging experiment: the InFOCμS balloon flight

Yasushi Ogasaka, Jack Tueller, Koujun Yamashita, Peter Serlemitsos, Ryo Shibata, Keisuke Tamura, Akihiro Furuzawa, Takuya Miyazawa, Rika Takahashi, Machiko Sakashita, Kenta Shimoda, Yuzuru Tawara, Hideyo Kunieda, Takashi Okajima, Hans Krimm, Scott Barthelmy, Yang Soong, Kai-Wing Chan, Scott Owens, Marie Rex, Ed Chapin, Mark Devlin

Proceedings Volume 5900, 59000R (2005) https://doi.org/10.1117/12.616677

KEYWORDS: Hard x-rays, Sensors, Telescopes, Signal detection, X-ray telescopes, Imaging systems, X-rays, Astronomy, Stars, Observatories

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Proceedings Article | 1 September 2005 Paper

Paper

Development of hard x-ray telescope for the InFOCμS balloon experiment

Ryo Shibata, Yasushi Ogasaka, Keisuke Tamura, Akihiro Furuzawa, Yuzuru Tawara, Hideyo Kunieda, Koujun Yamashita, Rika Takahashi, Machiko Sakashita, Takuya Miyazawa, Kenta Shimoda, Yoshihiro Fukaya, Chiaki Sakai, Nobuaki Yamada, Masataka Naitou, Tomonaga Iwaraha, Kenjiro Sakaki, Hiroaki Mutoh, Jack Tueller

Proceedings Volume 5900, 59000Q (2005) https://doi.org/10.1117/12.616792

KEYWORDS: Reflectors, X-ray telescopes, Hard x-rays, Telescopes, X-rays, Image quality, Space telescopes, Reflectivity, Reflector telescopes, X-ray optics

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Proceedings Article | 11 October 2004 Paper

Paper

NeXT hard x-ray telescope

Yasushi Ogasaka, Keisuke Tamura, Ryo Shibata, Akihiro Furuzawa, Takashi Okajima, Koujun Yamashita, Yuzuru Tawara, Hideyo Kunieda

Proceedings Volume 5488, (2004) https://doi.org/10.1117/12.552364

KEYWORDS: Hard x-rays, X-ray telescopes, Space telescopes, Reflectivity, X-rays, X-ray optics, Telescopes, Optical instrument design, Reflection, Astronomy

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Proceedings Article | 11 October 2004 Paper

Paper

Upgraded hard x-ray telescope with multilayer supermirror for the InFOCµS balloon experiment

Ryo Shibata, Yasushi Ogasaka, Keisuke Tamura, Akihiro Furuzawa, Yuzuru Tawara, Koujun Yamashita, Rika Takahashi, Machiko Sakashita, Takuya Miyazawa, Kenta Shimoda, Chiaki Sakai, Nobuaki Yamada, Masataka Naitou, Taku Futamura, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Takashi Okajima, Jack Tueller, Hans Krimm, Scott Barthelmy, Scott Owens, Hideyo Kunieda, Yoshiharu Namba

Proceedings Volume 5488, (2004) https://doi.org/10.1117/12.551462

KEYWORDS: X-ray telescopes, Hard x-rays, Reflectors, Telescopes, X-rays, Reflectivity, Space telescopes, Reflector telescopes, Image quality, Mirrors

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Proceedings Article | 11 October 2004 Paper

Paper

Development of a four-stage x-ray telescope for the DIOS (Diffuse Intergalactic Oxygen Surveyor) mission

Yuzuru Tawara, Akihiro Furuzawa, Yasushi Ogasaka, Keisuke Tamura, Takuya Miyazawa, Machiko Sakashita, Rika Takahashi

Proceedings Volume 5488, (2004) https://doi.org/10.1117/12.550881

KEYWORDS: Mirrors, X-ray telescopes, X-rays, Reflection, Oxygen, Telescopes, Satellites, Spatial resolution, X-ray optics, Aluminum

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Proceedings Article | 11 October 2004 Paper

Paper

Application of composite-layer mirror to soft x-ray telescopes

Yasushi Ogasaka, Chiaki Sakai, Keisuke Tamura, Nobuaki Yamada, Koujun Yamashita

Proceedings Volume 5488, (2004) https://doi.org/10.1117/12.552461

KEYWORDS: Reflectivity, Mirrors, Composites, X-ray telescopes, Platinum, Gold, Nickel, Absorption, X-rays, Optical instrument design

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Proceedings Article | 29 January 2004 Paper

Paper

HRTEM analysis of Pt/C multilayers

Naoyuki Ohnishi, Yuji Nonomura, Yasushi Ogasaka, Yuzuru Tawara, Yoshiharu Namba, Kojun Yamashita

Proceedings Volume 5168, (2004) https://doi.org/10.1117/12.508632

KEYWORDS: Platinum, Interfaces, Multilayers, Crystals, Transmission electron microscopy, X-rays, Sputter deposition, Image processing, Silicon, Mirrors

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Proceedings Article | 29 January 2004 Paper

Paper

Development of four-stage x-ray telescope for wide-field fine spectroscopic mission

Yuzuru Tawara, Yasushi Ogasaka, Keisuke Tamura, Akihiro Furuzawa

Proceedings Volume 5168, (2004) https://doi.org/10.1117/12.506555

KEYWORDS: X-ray telescopes, X-rays, Mirrors, Satellites, Sensors, Spectroscopy, Reflection, Ray tracing, X-ray optics, Point spread functions

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Proceedings Article | 29 January 2004 Paper

Paper

Development of the hard x-ray telescope for balloon-borne experiment

Keisuke Tamura, Yasushi Ogasaka, Ryo Shibata, Akihiro Furuzawa, Taku Futamura, Rika Takahashi, Yuzuru Tawara, Kojun Yamashita, Hideyo Kunieda, Jack Tuller, Peter Serlemitsos, Takashi Okajima

Proceedings Volume 5168, (2004) https://doi.org/10.1117/12.505655

KEYWORDS: X-ray telescopes, Telescopes, Hard x-rays, Space telescopes, X-rays, Mirrors, Synchrotron radiation, Spatial resolution, X-ray imaging, X-ray optics

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Proceedings Article | 29 January 2004 Paper

Paper

Ground-based X-ray calibration of the telescopes onboard Astro-E2 satellite

Kazutami Misaki, Hideyo Kunieda, Yoshitomo Maeda, Yoshito Haba, Kei Itoh, Hideyuki Mori, Ryo Iizuka, Akiharu Itoh, Hirohiko Inoue, Shunsaku Okada, Yuushi Yokoyama, Yasushi Ogasaka, Keisuke Tamura, Akihiro Furuzawa, Ryo Shibata, Takeshi Tanaka, Masataka Naitou, Manabu Ishida, Akira Hayakawa, Chiaki Inoue, Atsushi Hayashi, Tomohiro Shimizu, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Takashi Okajima, John Lehan

Proceedings Volume 5168, (2004) https://doi.org/10.1117/12.505773

KEYWORDS: X-rays, X-ray telescopes, Image quality, Calibration, Space telescopes, Telescopes, Point spread functions, X-ray imaging, X-ray detectors, Sensors

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Proceedings Article | 11 March 2003 Paper

Paper

Supermirror design for the XEUS x-ray telescope

Takashi Okajima, Yasushi Ogasaka, Keisuke Tamura, Akihiro Furuzawa, Yuzuru Tawara, Koujun Yamashita, Hideyo Kunieda

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461409

KEYWORDS: Mirrors, X-ray telescopes, Reflectivity, Hard x-rays, X-rays, Platinum, Multilayers, Space telescopes, Optical instrument design, Reflection

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Proceedings Article | 11 March 2003 Paper

Paper

Development of supermirror telescope up to 80 keV

Keisuke Tamura, Koujun Yamashita, Yuzuru Tawara, Yasushi Ogasaka, Yukihiro Satake, Ken'ichi Nomoto, Takashi Okajima

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461318

KEYWORDS: Reflectivity, X-rays, Platinum, X-ray telescopes, Hard x-rays, Reflection, Multilayers, Telescopes, Sputter deposition, Mirrors

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Proceedings Article | 11 March 2003 Paper

Paper

Development of supermirror hard x-ray telescope and the results of the first InFOCuS flight observation

Yasushi Ogasaka, Keisuke Tamura, Takashi Okajima, Yuzuru Tawara, Koujun Yamashita, Akihiro Furuzawa, Kazutoshi Haga, Satoshi Ichimaru, Seiji Takahashi, Shinichi Fukuda, Hideo Kito, Arifumi Goto, Seima Kato, Hiroyuki Satake, Ken'ichi Nomoto, Noriyuki Hamada, Peter Serlemitsos, Jack Tueller, Yang Soong, Kai-Wing Chan, Scott Owens, Fred Berendse, Hans Krimm, Wayne Baumgartner, Scott Barthelmy, Hideyo Kunieda, Kazutami Misaki, Ryo Shibata, Hideyuki Mori, Kei Itoh, Yoshiharu Namba

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461531

KEYWORDS: X-ray telescopes, Hard x-rays, Reflectors, Reflectivity, X-rays, Sensors, Space telescopes, Telescopes, Reflection, Mirrors

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Proceedings Article | 11 March 2003 Paper

Paper

InFOCuS hard x-ray telescope: pixellated CZT detector/shield performance and flight results

Wayne Baumgartner, Jack Tueller, Hans Krimm, Scott Barthelmy, Fred Berendse, L. Ryan, F. Birsa, Takashi Okajima, Hideyo Kunieda, Yasushi Ogasaka, Yuzuru Tawara, Keisuke Tamura

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461491

KEYWORDS: Sensors, Mirrors, Hard x-rays, Space telescopes, X-ray telescopes, Telescopes, Astronomy, Spectral resolution, Capacitance, Spatial resolution

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Proceedings Article | 11 March 2003 Paper

Paper

Broadband x-ray imaging mission NeXT

Yuzuru Tawara, Hideyo Kunieda, Hajime Inoue, Kazuhisa Mitsuda, Yasushi Ogasaka, Tadayuki Takahashi

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461508

KEYWORDS: Hard x-rays, Sensors, X-ray telescopes, Charge-coupled devices, X-ray imaging, X-rays, Imaging systems, Image sensors, Mirrors, Gamma radiation

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Proceedings Article | 11 March 2003 Paper

Paper

Design study of x-ray telescope onbard NeXT

Akihiro Furuzawa, Takashi Okajima, Yasushi Ogasaka, Keisuke Tamura, Yuzuru Tawara, Koujun Yamashita

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461422

KEYWORDS: X-ray telescopes, X-rays, Hard x-rays, Telescopes, Galaxy groups and clusters, Optical instrument design, X-ray astronomy, Galactic astronomy, Astronomy, Magnetism

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Proceedings Article | 11 March 2003 Paper

Paper

Development of thin foil substrates for an X-ray telescope: II.

Hisamitsu Awaki, Kazunori Heike, Youichi Misao, Yuzuru Tawara, Yasushi Ogasaka, Hideyo Kunieda, Hitoshi Ohmori, Weimin Lin, Sei Moriyasu, Yoshiyuki Ueno, Shin-ya Morita, Kazutoshi Katahira, Changling Liu, Hiromichi Honda, Susumu Shioya

Proceedings Volume 4851, (2003) https://doi.org/10.1117/12.461142

KEYWORDS: Mirrors, Reflectors, X-ray telescopes, Spatial resolution, X-rays, Aluminum, X-ray optics, X-ray astronomy, Telescopes, Astronomy

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Proceedings Article | 30 January 2002 Paper

Paper

InFOCuS balloon-borne hard x-ray experiment with multilayer supermirror x-ray telescope

Yuzuru Tawara, Koujun Yamashita, Yasushi Ogasaka, Keisuke Tamura, Kazutoshi Haga, Takashi Okajima, Satoshi Ichimaru, Seiji Takahashi, Arifumi Gotou, Hideo Kitou, Shinichi Fukuda, Yuichi Kamata, Akihiro Furuzawa, Fumie Akimoto, Tsutomu Yoshioka, Kazuo Kondou, Yoshito Haba, Takeshi Tanaka, Hideyo Kunieda, Kazutami Misaki, Jack Tuller, Peter Serlemitsos, Kai-Wing Chan, Yang Soong, Scott Owens, Fred Berendse, W.H. Baugartner, Hans Krimm, H. Bradford Barber, Erick Young

Proceedings Volume 4496, (2002) https://doi.org/10.1117/12.454363

KEYWORDS: X-ray telescopes, Hard x-rays, X-rays, Space telescopes, Mirrors, Sensors, X-ray optics, Telescopes, Stars, Cameras

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Proceedings Article | 30 January 2002 Paper

Paper

Characterization and performance of the InFOCuS 20-40 keV x-ray focusing mirror

Scott Owens, Fred Berendse, Takashi Okajima, Kazutami Misaki, Yasushi Ogasaka, Keisuke Tamura, Yuzuru Tawara, Hideyo Kunieda, Kai-Wing Chan, Yang Soong, Wayne Baumgartner, Hans Krimm, Jack Tueller, Peter Serlemitsos, Koujun Yamashita, Kazutoshi Haga, Satoshi Ichimaru, S. Takahashi, Arifumi Gotou, Hideo Kitou, Shinichi Fukuda, Yuichi Kamata, Akihiro Furuzawa, Fumie Akimoto, Tsutomu Yoshioka, Kazuo Kondou, Yoshito Haba, Takeshi Tanaka

Proceedings Volume 4496, (2002) https://doi.org/10.1117/12.454364

KEYWORDS: Mirrors, X-rays, Sensors, Point spread functions, Raster graphics, X-ray sources, X-ray telescopes, Multilayers, Space telescopes, Imaging systems

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Proceedings Article | 14 November 2001 Paper

Paper

Development of a thin substrate for x-ray telescope

Hisamitsu Awaki, Yuzuru Tawara, Yasushi Ogasaka, Hideyo Kunieda, Hitoshi Ohmori, Hiromichi Honda, Susumu Shioya

Proceedings Volume 4501, (2001) https://doi.org/10.1117/12.448500

KEYWORDS: X-ray telescopes, Mirrors, Space telescopes, Telescopes, X-rays, Aluminum, Spatial resolution, Annealing, X-ray astronomy, Confocal microscopy

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Proceedings Article | 14 November 2001 Paper

Paper

New design concept of supermirror for hard x-ray telescope

Keisuke Tamura, Hideo Kitou, Koujun Yamashita, Yuzuru Tawara, Yasushi Ogasaka, Takashi Okajima, Satoshi Ichimaru, Arifumi Gotou, Ken'ichi Nomoto

Proceedings Volume 4501, (2001) https://doi.org/10.1117/12.448488

KEYWORDS: Reflectivity, X-ray telescopes, Optical instrument design, X-rays, Hard x-rays, Data modeling, Telescopes, Reflection, Absorption, Interfaces

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Proceedings Article | 5 January 2001 Paper

Paper

X-ray measurements of the supermirror using synchrotron radiation

Takashi Okajima, Satoshi Ichimaru, Keisuke Tamura, Kazutoshi Haga, Yasushi Ogasaka, S. Takahashi, Shinichi Fukuda, Hideo Kitou, Arifumi Gotou, Yuzuru Tawara, Koujun Yamashita, Yoshiyuki Tsusaka, S. Takeda, Hideyo Kunieda

Proceedings Volume 4145, (2001) https://doi.org/10.1117/12.411657

KEYWORDS: X-rays, Hard x-rays, Platinum, Reflectivity, Reflectors, Mirrors, X-ray telescopes, Space telescopes, Synchrotron radiation, Reflector telescopes

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Proceedings Article | 28 November 2000 Paper

Paper

Development of a balloonborne hard x-ray telescope using multilayer supermirror

Keisuke Tamura, Koujun Yamashita, Yuzuru Tawara, Yasushi Ogasaka, Kazutoshi Haga, Takashi Okajima, Satoshi Ichimaru, Seiji Takahashi, Hideo Kitou, Arifumi Gotou, Ken'ichi Nomoto, Hiroyuki Satake, Seima Kato, Hideyo Kunieda, Peter Serlemitsos, Jack Tueller

Proceedings Volume 4138, (2000) https://doi.org/10.1117/12.407550

KEYWORDS: X-rays, Reflectivity, X-ray telescopes, Telescopes, Hard x-rays, Space telescopes, Reflectors, Platinum, Reflector telescopes, Synchrotron radiation

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Proceedings Article | 18 July 2000 Paper

Paper

Multilayer coated thin foil mirrors for InFOCuS

Scott Owens, Takashi Okajima, Yasushi Ogasaka, Fred Berendse, Peter Serlemitsos

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391601

KEYWORDS: Mirrors, Interfaces, Scattering, X-rays, Reflectivity, Platinum, Multilayers, X-ray telescopes, Glasses, Space telescopes

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Proceedings Article | 18 July 2000 Paper

Paper

Development of a balloonborne hard x-ray telescope using a Pt/C multilayer supermirror

Yasushi Ogasaka, Keisuke Tamura, Kazutoshi Haga, Takashi Okajima, Satoshi Ichimaru, Seiji Takahashi, Arifumi Gotou, Hideo Kitou, Shinichi Fukuda, Hideyo Kunieda, Yuzuru Tawara, Koujun Yamashita, Yoshiyuki Tsusaka, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Scott Owens, Fred Berendse, Jack Tueller

Proceedings Volume 4012, (2000) https://doi.org/10.1117/12.391565

KEYWORDS: Mirrors, Reflectivity, Hard x-rays, X-rays, Space telescopes, Telescopes, X-ray telescopes, Platinum, Multilayers, Solids

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Proceedings Article | 29 September 1999 Paper

Paper

New design concept of multilayer supermirrors for hard x-ray optics

Koujun Yamashita, Hideyo Kunieda, Yuzuru Tawara, Keisuke Tamura, Yasushi Ogasaka, Kazutoshi Haga, Takashi Okajima, Y. Hidaka, Satoshi Ichimaru, S. Takahashi, Arifumi Gotou, Hideo Kitou, Yoshiyuki Tsusaka, K. Yokoyama, S. Takeda

Proceedings Volume 3766, (1999) https://doi.org/10.1117/12.363646

KEYWORDS: Reflectivity, Hard x-rays, X-rays, X-ray telescopes, Fabry–Perot interferometers, X-ray optics, Optical instrument design, Platinum, Mirrors, Phase matching

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Proceedings Article | 19 November 1998 Paper

Paper

X-ray calibration of telescopes on board the ASTRO-E satellite

Ryo Shibata, Manabu Ishida, Hirohiko Honda, Takao Endo, Jun'ichi Ishida, Hideyo Kunieda, Yuzuru Tawara, Akihiro Furuzawa, Yasushi Ogasaka, Manabu Watanabe, K. Misakai, Tetsuo Yoshioka, Peter Serlemitsos, Yang Soong, Kai-Wing Chan, Yuichi Terashima, Satoshi Akao

Proceedings Volume 3444, (1998) https://doi.org/10.1117/12.331282

KEYWORDS: X-rays, Reflectors, Stray light, Charge-coupled devices, Sensors, X-ray telescopes, Aluminum, Reflection, Calibration, Satellites

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Proceedings Article | 19 November 1998 Paper

Paper

Replication of a multilayer supermirror

Akihiro Furuzawa, Koujun Yamashita, Hideyo Kunieda, Yuzuru Tawara, Keisuke Tamura, Kazutoshi Haga, Norihiko Nakamura, Norio Nakajo, Harumi Takata, Takashi Okajima, Yasushi Ogasaka, Gyanendra Lodha, Yoshiharu Namba

Proceedings Volume 3444, (1998) https://doi.org/10.1117/12.331279

KEYWORDS: Reflectivity, Mirrors, X-rays, Glasses, Hard x-rays, Gold, Reflectors, Epoxies, X-ray telescopes, X-ray optics

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Proceedings Article | 11 July 1997 Paper

Paper

Multilayer option for conical foil x-ray mirrors

Peter Serlemitsos, Yasushi Ogasaka, Yang Soong, Kai-Wing Chan

Proceedings Volume 3113, (1997) https://doi.org/10.1117/12.278853

KEYWORDS: Mirrors, Reflectors, Multilayers, X-rays, Epoxies, Reflectometry, X-ray astronomy, Grazing incidence, Platinum, Astronomy

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Proceedings Article | 11 July 1997 Paper

Paper

Development of balloonborne hard x-ray telescopes using a multilayer supermirror

Keisuke Tamura, Koujun Yamashita, Hideyo Kunieda, Yuzuru Tawara, Akihiro Furuzawa, Kazutoshi Haga, Gyanendra Lodha, Norio Nakajo, Norihiko Nakamura, Takashi Okajima, Osamu Tsuda, Peter Serlemitsos, Jack Tueller, Robert Petre, Yasushi Ogasaka, Yang Soong, Kai-Wing Chan

Proceedings Volume 3113, (1997) https://doi.org/10.1117/12.278858

KEYWORDS: Reflectivity, Multilayers, X-ray telescopes, Hard x-rays, Telescopes, Glasses, Mirrors, X-rays, Sputter deposition, Space telescopes

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Proceedings Article | 1 February 1994 Paper

Paper

Calibration of Astro-D telescope with an x-ray pencil beam

Yoshiyuki Tsusaka, Hisanori Suzuki, Hisamitsu Awaki, Koujun Yamashita, Hideyo Kunieda, Yuzuru Tawara, Yasushi Ogasaka, Yasuhiro Uchibori, Hirohiko Honda, Masayuki Itoh, Hiroshi Tsunemi, Kiyoshi Hayashida, Susumu Nomoto, Mikio Wada, Emi Miyata, Peter Serlemitsos, Lalit Jalota, Yang Soong

Proceedings Volume 2011, (1994) https://doi.org/10.1117/12.167219

KEYWORDS: X-rays, X-ray telescopes, Mirrors, Ray tracing, Space telescopes, Charge-coupled devices, Calibration, Stray light, Reflection, Photons

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Proceedings Article | 12 November 1993 Paper

Paper

Development and characterization of large x-ray mirrors for high-brilliance synchrotron radiation

Hitoshi Yamaoka, Tomoya Uruga, Yoshiharu Sakurai, Etsuo Arakawa, Masaru Matsuoka, Yasushi Ogasaka, Koujun Yamashita

Proceedings Volume 1997, (1993) https://doi.org/10.1117/12.163814

KEYWORDS: Mirrors, Silicon carbide, Silicon, Reflectivity, Surface finishing, X-rays, Surface roughness, Interferometers, Platinum, X-ray characterization

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Showing 5 of 67 publications

Conference Committee Involvement (1)

Optics for EUV, X-Ray, and Gamma-Ray Astronomy IV

4 August 2009 | San Diego, California, United States

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