2015 Fiscal Year Annual Research Report
中赤外レーザー駆動水の窓軟X線の高出力化とシングルショット撮像の実現
Project/Area Number |
15H03570
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Research Institution | Utsunomiya University |
Principal Investigator |
東口 武史 宇都宮大学, 工学(系)研究科(研究院), 准教授 (80336289)
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Co-Investigator(Kenkyū-buntansha) |
牧村 哲也 筑波大学, 数理物質科学研究科(系), 准教授 (80261783)
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Project Period (FY) |
2015-04-01 – 2018-03-31
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Keywords | 軟X線顕微鏡 / 水の窓 / 重元素 / 多価イオン / レーザー生成プラズマ |
Outline of Annual Research Achievements |
コンパクトで帯域放射の高効率水の窓 (波長2.3~4.4 nm) 軟X線光源により,生体細胞をシングルショット撮影できる卓上型軟X線顕微鏡を開発し,研究室サイズで生命科学分野に貢献できるインパクトのある撮影を目指している.高効率水の窓軟X線光源を実現するため,従来の線放射ではなく帯域放射により,シングルショット撮影に必要な出力を確保し,変換効率も従来方式よりも10倍以上大きい0.1%以上にすることを目標としている.このため,高品質短パルス中赤外レーザーを開発し,多価イオン光源のスペクトル構造と光学的厚みを制御して,帯域放射光源を高出力化することにより,軟X線顕微鏡を実現することが必要である. 本年度は, (1) パルス幅可変 (3~20 ns),パルスエネルギー150 mJ/pulse,繰り返し周波数10 Hzの炭酸ガスレーザーシステムを構築し,重元素多価イオンを生成すると共に,極端紫外~軟X線スペクトルを観測した. (2) 水の窓・炭素の窓軟X線光源の高出力化実験を行い,スペクトル,放射エネルギー,持続時間,光源サイズなどを評価した. (3) 軟X線顕微鏡による撮像試験を開始した. これらの結果を踏まえて,来年度以降,高性能化,高精度化を図る予定である.
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Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
これまで,予定していた中赤外レーザーシステムを構築し,光源実験を実施すると共に,レーザー波長依存性や放射特性を詳細に調べた.この成果は原著論文で成果になっている.また,生物細胞などの撮像試験も開始しており,概ね順調に推移していると考えている.
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Strategy for Future Research Activity |
光源部(高品質短パルス中赤外レーザー・軟X線光源)を高出力化していることになるが,出力改善はもちろん進める.この光源を以下の構成からなる軟X線顕微鏡により,撮像試験を開始する.また,軟X線光学系では,多層膜をトロイダル鏡表面に塗布し,反射率を向上することにより,顕微鏡のスループットも100倍向上する計画である.これにより,明るい軟X線顕微鏡を実現できるものと考えている.
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[Journal Article] Spectral investigation of highly ionized bismuth plasmas produced by subnanosecond Nd:YAG laser pulses2016
Author(s)
Tao Wu, Takeshi Higashiguchi, Bowen Li, Goki Arai, Hiroyuki Hara, Yoshiki Kondo, Takanori Miyazaki, Thanh-Hung Dinh, Padraig Dunne, Fergal O’Reilly, Emma Sokell, and Gerry O’Sullivan
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Journal Title
Journal of Physics B
Volume: 49
Pages: 035001 (1-10)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Sources for beyond extreme ultraviolet lithography and water window imaging2015
Author(s)
Gerry O’Sullivan, Bowen Li, Padraig Dunne, Paddy Hayden, Deirdre Kilbane, Ragava Lokasani, Elaine Long, Hayato Ohashi, Fergal O’Reilly, John Sheil, Paul Sheridan, Emma Sokell, Chihiro Suzuki, Elgiva White, and Takeshi Higashiguchi
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Journal Title
Physica Scripta
Volume: 90
Pages: 054002 (1-8)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Characteristics of x-ray emission from optically thin high-Z plasmas in soft x-ray region2015
Author(s)
Hayato Ohashi, Takeshi Higashiguchi, Yuhei Suzuki, Goki Arai, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Hiroyuki A. Sakaue, Daiji Kato, Izumi Murakami, Naoki Tamura, Shigeru Sudo, Fumihiro Koike, and Chihiro Suzuki
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Journal Title
Journal of Physics B
Volume: 48
Pages: 144011 (1-7)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Spectroscopy of highly charged ions and its relevance to EUV and soft x-ray source development2015
Author(s)
Gerry O’Sullivan, Bowen Li, Rebekah D’Arcy, Padraig Dunne, Paddy Hayden, Deirdre Kilbane, Tom McCormack, Hayato Ohashi, Fergal O’Reilly, Paul Sheridan, Emma Sokell, Chihiro Suzuki, and Takeshi Higashiguchi
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Journal Title
Journal of Physics B
Volume: 48
Pages: 144025 (1-16)
DOI
Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Analysis of extreme ultraviolet spectra from laser produced rhenium plasmas2015
Author(s)
Tao Wu, Takeshi Higashiguchi, Bowen Li, Yuhei Suzuki, Goki Arai, Thanh-Hung Dinh, Padraig Dunne, Fergal O’Reilly, Emma Sokell, Luning Liu, and Gerry O’Sullivan
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Journal Title
Journal of Physics B
Volume: 48
Pages: 165005 (1-8)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Properties of the extreme ultraviolet emission from germanium and gallium plasmas2015
Author(s)
Bowen Li, Hiroyuki Hara, Yuhei Suzuki, Goki Arai, Takeshi Higashiguchi, Hayato Ohashi, Weihua Jiang, Tetsuya Makimura, Hiroyuki A. Sakaue, Chihiro Suzuki, Daiji Kato, Izumi Murakami, Padraig Dunne, Elaine Long, Paul Sheridan, Ximeng Chen, and Gerry O’Sullivan
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Journal Title
Journal of Applied Physics
Volume: 118
Pages: 073302 (1-8)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Generation of radially polarized high energy mid-infrared optical vortex by use of a passive axially symmetric ZnSe waveplate2015
Author(s)
Toshitaka Wakayama, Hiroki Oikawa, Atsushi Sasanuma, Goki Arai, Yusuke Fujii, Thanh-Hung Dinh, Takeshi Higashiguchi, Kazuyuki Sakaue, Masakazu Washio, Taisuke Miura, Akihiko Takahashi, Daisuke Nakamura, Tatsuo Okada, Motoki Yonemura, and Yukitoshi Otani
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Journal Title
Applied Physics Letters
Volume: 107
Pages: 081112 (1-5)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Temporal behavior of unresolved transition array emission in water window soft x-ray spectral region from multiply charged ions2015
Author(s)
Thanh-Hung Dinh, Yuhei Suzuki, Goki Arai, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Shinsuke Fujioka, Noboru Hasegawa, Tetsuya Kawachi, Masaharu Nishikino, and Takeshi Higashiguchi
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Journal Title
Applied Physics Letters
Volume: 107
Pages: 121101 (1-5)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Journal Article] Numerical evaluation of a 13.5-nm high-brightness microplasma extreme ultraviolet source2015
Author(s)
Hiroyuki Hara, Goki Arai, Thanh-Hung Dinh, Weihua Jiang, Taisuke Miura, Akira Endo, Takeo Ejima, Bowen Li, Padraig Dunne, Gerry O’Sullivan, Atsushi Sunahara, and Takeshi Higashiguchi
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Journal Title
Journal of Applied Physics
Volume: 118
Pages: 193301 (1-7)
DOI
Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
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[Presentation] Unresolved transition arrays from laser-produced high-Z plasmas for microscopy in the water window soft x-ray region2015
Author(s)
Thanh-Hung Dinh, Yoshiki Kondo, Goki Arai, Taisuke Miura, Akira Endo, Tetsuya Makimura, Padraig Dunne, Gerry O’Sullivan, Tadashi Hatano, Takeio Eijima, and Takeshi Higashiguchi
Organizer
The 13th Symposium on X-ray Imaging Optics
Place of Presentation
Noyori Conference Hall, Nagoya University (Higashiyama campus), Nagoya, Japan
Year and Date
2015-11-17
Int'l Joint Research
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[Presentation] Multiply charged ion plasma sources for compact x-ray microscopy in the water window spectral region2015
Author(s)
T. H. Dinh, Y. Kondo, G. Arai, T. Miura, A. Endo, T. Makimura, P. Dunne, G. O’Sullivan, T. Hatano, T. Ejima, and T. Higashiguchi
Organizer
SPIE/OSJ Biophotonics Japan 2015
Place of Presentation
Univesity of Tsukuba (Tokyo campus), Tokyo, Japan
Year and Date
2015-10-27
Int'l Joint Research
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[Presentation] Development of a 10-Hz short pulse CO2 laser for short wavelength light sources2015
Author(s)
Reiho Amano, Atsushi Sasanuma, Thanh-Hung Dinh, Goki Arai, Yusuke Fujii, Akihiko Takahashi, Daisuke Nakamura, Tatsuo Okada, Tetsuya Makimura, Taisuke Miura, Akira Endo, Tomas Mocek, Padraig Dunne, Gerry O’Sullivan, and Takeshi Higashiguchi
Organizer
SPIE/OSJ Biophotonics Japan 2015
Place of Presentation
Univesity of Tsukuba (Tokyo campus), Tokyo, Japan
Year and Date
2015-10-27
Int'l Joint Research
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[Presentation] Development of short pulse CO2 laser for efficient rare earth plasma extreme ultraviolet sources2015
Author(s)
R. Amano, T. H. Dinh, A. Sasanuma, G. Arai, Y. Fujii, K. Nanto, A. Takahashi, D. Nakamura, T. Okada, T. Makimura, T. Miura, A. Endo, T. Mocek, P. Dunne, G. O’Sullivan, and T. Higashiguchi
Organizer
2015 IEEE Photonics Conference, 28th Annual Conference of The IEEE Photonics Society
Place of Presentation
Hyatt Regency Reston, Reston, Virginia USA
Year and Date
2015-10-05
Int'l Joint Research
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[Presentation] Spectral and temporal behavior of multiply ionized high-Z plasmas in the water window soft x-ray spectral region2015
Author(s)
T. H. Dinh, Y. Suzuki, G. Arai, M. Nishikino, N. Hasegawa, T. Kawachi, P. Dunne, G. O’Sullivan, and T. Higashiguchi
Organizer
2015 IEEE Photonics Conference, 28th Annual Conference of The IEEE Photonics Society
Place of Presentation
Hyatt Regency Reston, Reston, Virginia USA
Year and Date
2015-10-05
Int'l Joint Research
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[Presentation] Efficient EUV & soft x-ray sources by laser-produced high-Z plasmas2015
Author(s)
Takeshi Higashiguchi
Organizer
The 7th Asian Workshop on Generation and Application of Coherent XUV and X-ray Radiation (7th AWCXR)
Place of Presentation
Center for Relativistic Laser Science of Institute for Basic Science, Gwangju Institute of Science and Technology (GIST), Gwangju, Korea
Year and Date
2015-08-31
Int'l Joint Research / Invited
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[Presentation] Development of Nanosecond Pulse CO2 Laser for Efficient Extreme Ultraviolet Generation2015
Author(s)
Reiho Amano, Thanh Hung Dinh, Atsushi Sasanuma, Goki Arai, Yusuke Fujii, Akihiko Takahashi, Daisuke Nakamura, Tatsuo Okada, Taisuke Miura, Akira Endo, Tomas Mocek, and Takeshi Higashiguchi
Organizer
The 4th Advanced Lasers and Photon Sources (ALPS’15)
Place of Presentation
PACIFICO Yokohama, Yokohama Japan
Year and Date
2015-04-24
Int'l Joint Research
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[Presentation] Efficient extreme ultraviolet emission in highly ionized high-Z laser-produced plasmas2015
Author(s)
Takeshi Higashiguchi, Reiho Amano, Thanh-Hung Dinh, Takanori Miyazaki, Yuhei Suzuki, Masato Kawasaki, Atsushi Sasanuma, Goki Arai, Hiroyuki Hara, Yusuke Fujii, Kenichiro Nanto, Akihiko Takahashi, Daisuke Nakamura, Tatsuo Okada, Tetsuya Makimura, Taisuke Miura, Akira Endo, Bowen Li, Padraig Dunne, and Gerry O’Sulliban
Organizer
The 4th Advanced Lasers and Photon Sources (ALPS’15)
Place of Presentation
PACIFICO Yokohama, Yokohama Japan
Year and Date
2015-04-23
Int'l Joint Research
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