Dr. Ichi Tanaka Profile

Dr. Ichi Tanaka

Researcher at Subaru Telescope, NAOJ

SPIE Involvement:

Author

Publications (21)

Proceedings Article | 19 July 2024 Presentation

Presentation

Project overview and update on ULTIMATE-Subaru: the next-generation wide-field adaptive optics instrument for the Subaru telescope

Yosuke Minowa, Yusei Koyama, Kentaro Motohara, Yoshito Ono, Shin Oya, Masayuki Akiyama, Sadman Ali, Takamasa Bando, Takashi Hattori, Yutaka Hayano, Masayuki Hirabayashi, Junichi Katakura, Tadayuki Kodama, Masahiro Konishi, Masaki Morita, Yoshiyuki Obuchi, Hirofumi Okita, Naohisa Sato, Hideki Takami, Ichi Tanaka, Yoko Tanaka, Koki Terao, Chihiro Tokoku, Fumihiro Uraguchi, Kenshi Yanagisawa, Hiroshige Yoshida, Michitoshi Yoshida, Céline D'Orgeville, Noelia Martínez Rey, Joshua Carter, David Chandler, Jesse Cranney, Roger Haynes, Dionne Haynes, Nicholas Herrald, Andrew Kruse, Hajime Ogane, Lu Wang, Shiang-Yu Wang, Chi-Yi Chou, Masahiko Kimura

Proceedings Volume 13096, 130961A (2024) https://doi.org/10.1117/12.3018698

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Proceedings Article | 18 July 2024 Poster + Paper

Poster + Paper

ULTIMATE-Subaru: sensitivity performance of the NIR wide-field imaging camera with ground layer adaptive optics

Sadman Ali, Yusei Koyama, Kentaro Motohara, Yoshito Ono, Minowa Yosuke, Ichi Tanaka

Proceedings Volume 13096, 130969K (2024) https://doi.org/10.1117/12.3020551

KEYWORDS: Astronomical adaptive optics, Tunable filters, Telescopes, Near infrared, Equipment, Background noise, Mirrors, K band, Adaptive optics, Gemini Observatory, Point spread functions

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Proceedings Article | 18 July 2024 Presentation + Paper

Presentation + Paper

Development of novel high-efficiency and wideband medium-dispersion grisms for MOIRCS at Subaru Telescope

Ichi Tanaka, Noboru Ebizuka, Chihiro Tokoku, Takashi Hattori, Yusei Koyama, Kentaro Motohara, Michael Lemmen, Brian Elms, Koji Omata, Yosuke Minowa, Tadayuki Kodama

Proceedings Volume 13096, 130961N (2024) https://doi.org/10.1117/12.3019508

KEYWORDS: Prisms, Telescopes, Optical gratings, Fabrication, Antireflective coatings, Zinc selenide, Equipment, Diffraction gratings, Volume Bragg gratings

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Proceedings Article | 30 August 2022 Presentation + Paper

Presentation + Paper

ULTIMATE-Subaru: GLAO preliminary design overview

Yosuke Minowa, Yoshito Ono, Yoko Tanaka, Hiroshige Yoshida, Koki Terao, Yusei Koyama, Sadman Ali, Ichi Tanaka, Takashi Hattori, Hirofumi Okita, Yutaka Hayano, Shin Oya, Kentaro Motohara, Kenshi Yanagisawa, Michitoshi Yoshida, Masayuki Akiyama, Tadayuki Kodama, Hajime Ogane, Masahiro Konishi, Noelia Martinez Rey, Nicholas Herrald, Céline d'Orgeville, François Rigaut, Israel Vaughn, David Chandler, Dionne Haynes, Warrick Schofield, Shiang-Yu Wang, Chi-Yi Chou, Masahiko Kimura

Proceedings Volume 12185, 1218521 (2022) https://doi.org/10.1117/12.2629749

KEYWORDS: Telescopes, Mirrors, Control systems, Stars, Camera shutters, Adaptive optics, Wavefront sensors, Optical instrument design, Near infrared, Monochromatic aberrations

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Proceedings Article | 11 June 2021 Open Access

Open Access

Poster + Presentation + Paper

Novel gratings for astronomical observations II

Noboru Ebizuka, Takayuki Okamoto, Yutaka Yamagata, Minoru Sasaki, Ichi Tanaka, Takashi Hattori, Yusuke Nakauchi, Makio Nishimaki, Kazuya Yamamoto, Makoto Okada, Kazuto Saiki

Proceedings Volume 11852, 1185263 (2021) https://doi.org/10.1117/12.2600051

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Proceedings Article | 18 May 2021 Open Access

Open Access

Paper

Developing the wide-spectral coverage, very high-efficiency grisms for MOIRCS on Subaru Telescope (Erratum)

Ichi Tanaka, Noboru Ebizuka, Kentaro Motohara, Tadayuki Kodama, Takashi Hattori, Koji Omata, Hidenori Takahashi, Masahiro Konishi, Yoko Tanaka

Proceedings Volume 11451, 1145174 (2021) https://doi.org/10.1117/12.2601442

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

ULTIMATE-Subaru: conceptual design of WFI, a near-infrared wide field imager

Kentaro Motohara, Yusuke Minowa, Ichi Tanaka, Takashi Hattori, Yusei Koyama, Masahiro Konishi, Kenshi Yanagisawa, Ikuru Iwata, Shiang-Yu Wang, Richard C. Chou, Masahiko Kimura, John Pazder

Proceedings Volume 11447, 114470N (2020) https://doi.org/10.1117/12.2560324

KEYWORDS: Imaging systems, Optical filters, Telescopes, Sensors, Adaptive optics, Deformable mirrors, Mirrors, Turbulence, Astronomical imaging, Spectrographs

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Proceedings Article | 13 December 2020 Poster + Paper

Poster + Paper

The University of Tokyo Atacama Observatory 6.5m telescope: On-sky performance of the near-infrared instrument SWIMS on the Subaru telescope

Masahiro Konishi, Kentaro Motohara, Hidenori Takahashi, Natsuko Kato, Kosuke Kushibiki, Hiroki Nakamura, Nuo Chen, Tadayuki Kodama, Masao Hayashi, Ichi Tanaka, Ken-ichi Tadaki, Jun Toshikawa, Yusei Koyama, Rhythm Shimakawa, Tomoko Suzuki, Tetsuro Asano, Hirofumi Okita, Shintaro Koshida, Ken Tateuchi, Soya Todo, Yutaka Kobayakawa, Yutaro Kitagawa, Hirofumi Ohashi, Yukihiro Kono, Yasunori Terao, Tsutomu Aoki, Kentaro Asano, Mamoru Doi, Bunyo Hatsukade, Takafumi Kamizuka, Kotaro Kohno, Takeo Minezaki, Takashi Miyata, Tomoki Morokuma, Mizuki Numata, Shigeyuki Sako, Hiroaki Sameshima, Takao Soyano, Toshihiko Tanabé, Masuo Tanaka, Ken'ichi Tarusawa, Ryou Ohsawa, Kengo Tachibana, Tsubasa Michifuji, Yuzuru Yoshii

Proceedings Volume 11447, 114475H (2020) https://doi.org/10.1117/12.2560422

KEYWORDS: Telescopes, Observatories, Infrared telescopes, Astronomical imaging, Infrared spectroscopy, Infrared radiation, Spectrographs, Mirrors, Imaging spectroscopy, Spectroscopes

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Proceedings Article | 13 December 2020 Poster + Presentation + Paper

Poster + Presentation + Paper

Developing the wide-spectral coverage, very high-efficiency grisms for MOIRCS on Subaru Telescope

Ichi Tanaka, Noboru Ebizuka, Kentaro Motohara, Tadayuki Kodama, Takashi Hattori, Koji Omata, Hidenori Takahashi, Masahiro Konishi, Yoko Tanaka

Proceedings Volume 11451, 114515A (2020) https://doi.org/10.1117/12.2561176

KEYWORDS: Telescopes, Astronomy, Manufacturing, Prisms, Imaging systems, Astronomical imaging, Spectrographs, Spectroscopy, Galactic astronomy, Near infrared

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Proceedings Article | 13 December 2020 Presentation + Paper

Presentation + Paper

ULTIMATE-Subaru: system performance modeling of GLAO and wide-field NIR instruments

Yosuke Minowa, Yusei Koyama, Kenshi Yanagisawa, Kentaro Motohara, Ichi Tanaka, Yoshito Ono, Takashi Hattori, Christophe Clergeon, Yutaka Hayano, Masayuki Akiyama, Tadayuki Kodama, Céline d'Orgeville, Francois Rigaut, Shiang-Yu Wang, Michitoshi Yoshida

Proceedings Volume 11450, 114500O (2020) https://doi.org/10.1117/12.2561950

KEYWORDS: Near infrared, Performance modeling, Systems modeling, Imaging systems, Imaging spectroscopy, Cesium, Telescopes, Near infrared spectroscopy, Spectroscopes, Infrared telescopes

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Proceedings Article | 3 January 2020 Paper

Paper

ULTIMATE-Subaru: enhancing the Subaru's wide-field capability with GLAO

Yosuke Minowa, Yusei Koyama, Yoshito Ono, Ichi Tanaka, Takashi Hattori, Christophe Clergeon, Masayuki Akiyama, Tadayuki Kodama, Kentaro Motohara, François Rigaut, Céline d'Orgeville, Shiang-Yu Wang, Michitoshi Yoshida

Proceedings Volume 11203, 112030G (2020) https://doi.org/10.1117/12.2560539

KEYWORDS: Near infrared, Imaging systems, Imaging spectroscopy, Telescopes, Cesium, Near infrared spectroscopy, Spectroscopes, Infrared telescopes, Adaptive optics, Spatial resolution

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Proceedings Article | 10 July 2018 Presentation + Paper

Presentation + Paper

A conceptual design study for Subaru ULTIMATE GLAO

François Rigaut, Yosuke Minowa, Masayuki Akiyama, Yoshito Ono, Visa Korkiakoski, Nick Herrald, Gaston Gausachs, Christophe Clergeon, Shiang-Yu Wang, Céline d'Orgeville, Jordan Davies, Yusei Koyama, Ikuru Iwata, Tadayuki Kodama, Kentrao Motohara, Yutaka Hayano, Ichi Tanaka, Takashi Hattori, Michitoshi Yoshida

Proceedings Volume 10703, 1070324 (2018) https://doi.org/10.1117/12.2314085

KEYWORDS: Telescopes, Adaptive optics, Spectrographs, Wavefront sensors, Monte Carlo methods, Near infrared, Imaging systems, Stars, Astronomical imaging, Turbulence

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Proceedings Article | 6 July 2018 Paper

Paper

Development status of the simultaneous two-color near-infrared multi-object spectrograph SWIMS for the TAO 6.5m telescope

Masahiro Konishi, Kentaro Motohara, Hidenori Takahashi, Natsuko Kato, Yasunori Terao, Hirofumi Ohashi, Yukihiro Kono, Kosuke Kushibiki, Tadayuki Kodama, Masao Hayashi, Ichi Tanaka, Ken-ichi Tadaki, Jun Toshikawa, Yusei Koyama, Rhythm Shimakawa, Tomoko Suzuki, Ken Tateuchi, Yutaro Kitagawa, Yutaka Kobayakawa, Soya Todo, Tsutomu Aoki, Mamoru Doi, Bunyo Hatsukade, Takafumi Kamizuka, Kotaro Kohno, Takeo Minezaki, Takashi Miyata, Tomoki Morokuma , Shigeyuki Sako, Takao Soyano, Toshihiko Tanabé, Masuo Tanaka, Ken'ichi Tarusawa, Yoichi Tamura, Shintaro Koshida, Ryou Ohsawa, Masahito Uchiyama, Tomohiro Mori, Jumpei Yamaguchi, Yutaka Yoshida, Yuzuru Yoshii

Proceedings Volume 10702, 1070226 (2018) https://doi.org/10.1117/12.2310060

KEYWORDS: Telescopes, Sensors, Astronomical imaging, Observatories, Spectrographs, Astronomy, Spectroscopy, Infrared telescopes, Spectroscopes, Infrared radiation

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Proceedings Article | 19 June 2017 Open Access

Open Access

Presentation + Paper

Novel gratings for next-generation instruments of astronomical observations

N. Ebizuka, T. Okamoto, M. Takeda, T. Hosobata, Y. Yamagata, M. Sasaki, M. Uomoto, T. Shimatsu, S. Sato, N. Hashimoto, I. Tanaka, T. Hattori, S. Ozaki, W. Aoki

Proceedings Volume 10233, 102330M (2017) https://doi.org/10.1117/12.2264892

KEYWORDS: Diffraction gratings, Diffraction, Telescopes, Silicon, Space telescopes, Prisms, Astronomical telescopes, Spectrographs, Polarization, Fiber Bragg gratings, Gold, Reflectors, Ultraviolet radiation

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Proceedings Article | 9 August 2016 Paper

Paper

Detector upgrade of Subaru's Multi-object Infrared Camera and Spectrograph (MOIRCS)

Maximilian Fabricius, Joshua Walawender, Nobuo Arimoto, David Cook, Brian Elms, Yasuhito Hashiba, Takashi Hattori, Yen-Sang Hu, Ikuru Iwata, Tetsuo Nishimura, Koji Omata, Philip Tait, Naruhisa Takato, Ichi Tanaka, Shiang-Yu Wang, Mark Weber, Matthew Wung

Proceedings Volume 9908, 990828 (2016) https://doi.org/10.1117/12.2231417

KEYWORDS: Sensors, Astronomical imaging, Infrared sensors, Spectrographs, Infrared cameras, Electronics, Cryogenics, Sensors, Infrared sensors, Astronomical imaging, Coating, Molybdenum, Optical benches

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Proceedings Article | 9 August 2016 Paper

Paper

The nuMOIRCS project: detector upgrade overview and early commissioning results

Josh Walawender, Matthew Wung, Maximilian Fabricius, Ichi Tanaka, Nobuo Arimoto, David Cook, Brian Elms, Yasuhito Hashiba, Yen-Sang Hu, Ikuru Iwata, Tetsuo Nishimura, Koji Omata, Naruhisa Takato, Shiang-Yu Wang, Mark Weber

Proceedings Volume 9908, 99082G (2016) https://doi.org/10.1117/12.2231812

KEYWORDS: Sensors, Control systems, Telescopes, Cryogenics, Electronics, Computing systems, Human-machine interfaces, Power supplies, Imaging systems, Interfaces

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Proceedings Article | 22 July 2016 Paper

Paper

Novel diffraction gratings for next generation spectrographs with high spectral dispersion

N. Ebizuka, T. Okamoto, T. Hosobata, Y. Yamagata, M. Sasaki, M. Uomoto, T. Shimatsu, S. Sato, N. Hashimoto, I. Tanaka, T. Hattori, S. Ozaki, W. Aoki

Proceedings Volume 9912, 99122Z (2016) https://doi.org/10.1117/12.2231949

KEYWORDS: Diffraction gratings, Space telescopes, Diffraction, Liquid crystals, Telescopes, Spectrographs, Polarization, Mirrors, Refractive index, Reflection

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Proceedings Article | 21 July 2014 Paper

Paper

ULTIMATE-SUBARU: project status

Yutaka Hayano, Masayuki Akiyama, Takashi Hattori, Ikuru Iwata, Tadayuki Kodama, Olivier Lai, Yosuke Minowa, Yoshito Ono, Shin Oya, Koki Takiura, Ichi Tanaka, Yoko Tanaka, Nobuo Arimito

Proceedings Volume 9148, 91482S (2014) https://doi.org/10.1117/12.2055042

KEYWORDS: Galactic astronomy, Telescopes, Wavefront sensors, Mirrors, Space telescopes, Adaptive optics, Near infrared, Imaging systems, Stars, Spectrographs

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Proceedings Article | 23 July 2008 Paper

Paper

Automatic pre-cooling system for large infrared instruments

Koji Omata, Tetsuo Nishimura, Stephen Colley, David Cook, William Gorman, Barney Magrath, Lucio Ramos, Scot Kleinman, Chihiro Tokoku, Masahiro Konishi, Tomohiro Yoshikawa, Ichi Tanaka, Ryuji Suzuki

Proceedings Volume 7018, 70182E (2008) https://doi.org/10.1117/12.787173

KEYWORDS: Nitrogen, Liquids, Control systems, Sensors, Switches, Infrared radiation, Cryogenics, Collimators, Temperature metrology, Cooling systems

Read Abstract +

An infrared instrument used for observation has to keep the detector and optical components in a very cold environment during operation. However, because of maintenance, upgrades, and other routine work, there are situations that require the instrument to be warmed-up and then cooled-down again. At Subaru Observatory, our MOIRCS infrared instrument has required warm-up and cool-down several times a year for routine maintenance and filter replacement. The MOIRCS instrument has a large heat capacity and cool-down using only the closed cycle cooler is impractical due to the huge amount of time it would require. To address this problem Subaru engineers have created a mechanism to allow PRE-COOLING of the instrument via liquid nitrogen - allowing for a much faster pre-cool process. Even with liquid nitrogen, the pre-cool process requires 10 tanks and almost a week of continual monitoring in order to reach the desired target temperature. It is very difficult to work for such a long period of time at the oxygen starved summit of Mauna Kea (4205 meters),and issues of man-power and scheduling conflicts only add to the problems. To address these concerns Subaru developed an automated pre-cooling system which works continuously and remotely at the summit. The strategy was to have basic functionality for pre-cooling and user friendly interface. i.e. (1) Continuous cooling until the target temperature is reached by automated liquid nitrogen tank exchanges and precision temperature control by automated changes to the liquid nitrogen flow. (2) Remote monitoring and control of all parameter setting by Web browser as user interface (UI). The goal of the Subaru pre-cooling system was to make it both inexpensive and quick to implement by using existing technologies. The original goal (to cut down on labor and precision temperature control) has been attained through several pre-cooling and software/hardware modification cycles. We will report on the progress and status of our pre-cooling experiences in this presentation.

Proceedings Article | 28 June 2006 Paper

Paper

Infrared multi-object spectrograph of MOIRCS

Chihiro Tokoku, Ryuji Suzuki, Koji Omata, Masahiro Konishi, Tomohiro Yoshikawa, Masayuki Akiyama, Ichi Tanaka, Takashi Ichikawa, Tetsuo Nishimura

Proceedings Volume 6269, 62694N (2006) https://doi.org/10.1117/12.672418

KEYWORDS: Molybdenum, Stars, Telescopes, Sensors, Cryogenics, K band, Astronomical imaging, Spectroscopy, Spectrographs, Thermal effects

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Proceedings Article | 28 June 2006 Paper

Paper

MOIRCS: multi-object infrared camera and spectrograph for SUBARU

Takashi Ichikawa, Ryuji Suzuki, Chihiro Tokoku, Yuka Katsuno Uchimoto, Masahiro Konishi, Tomohiro Yoshikawa, Toru Yamada, Ichi Tanaka, Koji Omata, Tetsuo Nishimura

Proceedings Volume 6269, 626916 (2006) https://doi.org/10.1117/12.670078

KEYWORDS: Sensors, Telescopes, Digital signal processing, Optical benches, Imaging spectroscopy, Stars, Astronomical imaging, Molybdenum, Control systems, Spectroscopy

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Showing 5 of 21 publications

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