Kansai Photon Science Institute 　|　X-ray Laser Group

Department of Advanced Photon Research

X-ray Laser Group

Group Leader　KONDO Kiminori

Study outline

X-ray Laser Group had developed a high-power laser system utilizing zigzag-slab amplifier as an X-ray laser driver. The developed laser system is named TOPAZ (Twin Optical Amplifiers using Zigzag slab) and the zigzag-slab amplifier was installed unique cooling systems to obtain 0.1 Hz operation (10 seconds for 1 shot). TOPAZ outputs two beam lines and generates high-temperature- and high-pressure plasma for X-ray laser oscillator and amplifier. We demonstrated the first fully-spatial coherent X-ray laser driven by TOPAZ and the wavelength and pulse width are 13.9 nm and 7 ps, respectively (Fig. 1).

Our group is studying widely in field of X-ray laser, in particular, application of X-ray laser, X-ray laser development for high-repetition rate operation, and Development of X-ray optics etc.

Fig. 1：Scheme of fully spatial coherent X-ray laser with double targets technic.

Our group is also implementing a collaboration study with RIKEN and Keisokukensa.Co.Ltd. to develop a new remote- and high-speed-inspection method for detection defects inside tunnel-concrete. We are expecting the new inspection method will contribute industrial innovation. This work was supported by Council for Science, Technology and Innovation, “Cross-ministerial Strategic Innovation Promotion Program (SIP). (funding agency: NEDO)

Group member

Topics

（Research and Development for Laser System）

• Development of compact coherent soft-X-ray laser system
• Development of compact TiS laser system for Quantum-beam generation
• Development of inspection laser systems for defect inside tunnel-concrete

（Application study using X-ray laser）

• Observation of initial ablation process using soft-X-ray laser interferometer
• Nano-scale laser processing with fs-laser and soft-X-ray laser
• Development of EUV optics for lithography with soft-X-ray laser
• Development of multi-layer optics for soft-X-ray laser

Accomplishments

Invited talk

• "レーザー誘起光音響効果による非破壊検査と社会実装展開-"
  錦野将元, 第８回 科学技術交流財団「マイクロ固体フォトニクス」研究会・ 第８回 レーザー学会「ユビキタス・パワーレーザー」専門委員会. 2020/2/20

• "量子ビームの屋外利用 -レーザーによるトンネル点検, -長谷川登, 2019年度ビーム物理研究会. 2019/11/25

• “Highly precise material processing by ultrashort pulse soft X-ray laser”

•  Thanh Hung Dinh et al., The 15th Symposium of Japanese Research Community on X-ray Imaging Optics, 2019.10.26

• 高強度レーザーを用いたレーザー応用研究, 長谷川登, レーザー学会中四国支部講演会. 2019/10/17

• "Recent activities of ultra-high intensity laser-driven x-ray generation at KPSI Japan"

•  T-H Dinh, et al., SPIE Optical Engineering + Applications,  

   X-Ray Lasers and Coherent X-Ray Sources:Development and Applications XIII(2019/8/13

• "Verification Test for the High-Speed Laser Hammering Method in Road Tunnels",  Noboru Hasegawa et al., OPIC Laser Solutions for Space and the Earth(LSSE) 2019（2019/4/24） .

• "Short pulse soft x-ray laser ablation at low fluence region"
  M. Ishino, et al., SPIE OPTICS+OPT+ELECTRONICS（Optics Damage and Materials Processing by   EUV/X-ray Radiation (XDam7)）, 2019/4/1

Paper

• “Understanding water-mediated DNA damage production by molecular dynamics calculation of solvent accessibility”,  Y. Yonetani, H. Nakagawa, Chemical Physics Letters, 749, 137441 (2020). doi.org/10.1016/j.cplett.2020.137441

• “Laser-induced damage thresholds and mechanism of silica glass induced by ultra-short soft X-ray laser 
  pulse irradiation”, K. MIKAMI, M. ISHINO, T-H DINH, S. MOTOKOSHI, N. HASEGAWA, A. KON, Y. INUBUSHI, S.OWADA,H. KINOSHITA, M.NISHIKINO, Optics Letters 45, 2435-2438(2020).  doi.org/10.1364/OL.389288

• “Development of a soft x-ray laser beamline for irradiation-induced surface processing studies”, 
    M. ISHINO, T-H DINH, Y. HOSAKA, N. HASEGAWA, K. YOSHIMURA, H.YAMAMOTO, T. HATYANO, T. HIGASHIGUCHI, K. SAKAUE, S. ICHIMARU, M. HATAYAMA, A. SASAKI, M.WASHIO, M. NISHIKINO,AND Y. MAEKAWA, Appl. Opt. 59, 3692-3698 (2020). doi.org/10.1364/AO.387792.

• “Optimized highly charged ion production for strong soft x-ray sources obeying a quasi-Moseley’s law”, 
   Y. Shimada, H. Kawasaki, K. Watanabe, H. Hara, K. Anraku, M. Shoji1, T. Oba, M. Matsuda, W. Jiang, A. Sunahara, M. Nishikino, S. Namba, G. O’Sullivan, and T. Higashiguchi, AIP Advances 9, 115315 (2019).

• “Mesoscopic hierarchic polarization structure in relaxor ferroelectrics Pb[(Mg1/3Nb2/3)1-xTix]O3”, 
  K. Namikawa, M. Ishino, M. Matsushita, K. Ohwada, M. Kishimoto, J. Mizuki, N. Hasegawa, and M. Nishikino, Physical Review B 100, 184110 (2019).

• “Laser resonance frequency analysis: A novel measurement approach to evaluate acetabular cup stability during surgery”, 
  S. Kikuchi, K. Mikami, D. Nakashima, T. Kitamura, N. Hasegawa, M. Nishikino, A. Kanaji, M. Nakamura,  T. Nagura, Sensors 2019, 19, 4876; doi:10.3390/s19224876.

• “Controlling the Response of Silicon to Strong Excitation – Prospect towards Processing Materials at Sub-nanometer Precision”, 
  T-H Dinh, N. Medvedev, M. Ishino,.T, Kitamura, N. Hasegawa, T. Otobe, T. Higashiguchi, K. Sakaue, M.   Washio, T. Hatano, A. Kon, Y. Kubota, Y. Inubushi, S. Owada, T. Shibuya, B. Ziaja, and M. Nikishino, Communication Physics, https://doi.org/10.1038/s42005-019-0253-2.

• “Sensitivity Enhancement of Poly(methyl methacrylate) upon Exposure to Picosecond-Pulsed Extreme Ultraviolet”, 
  Yuji Hosaka, Tomoko G. Oyama, Hiroki Yamamoto, Masahiko Ishino, Thanh-Hung Dinh, and Masaharu Nishikino, Yasunari Maekawa, Applied Physics Letters, 115, 073109 (2019).

• “Atomic kinetics calculations of complex highly-charged ions in plasmas in non-local thermodynamic equilibrium by using a Monte-Carlo approach”, 
   A. Sasaki, R. More, K. Fujii, D. Kato, and I. Murakami, High Energy Density Physics 32, 051-7（2019）.

• “An estimation of line width roughness of photoresists for the extreme ultraviolet lithography due to photon shot noise using the percolation model”, 
  A. Sasaki, M.Ishino, and M. Nishikino, Jpn.J. Appl. Phys. 58, 055002（2019).

• “Enhancement of water-window soft X-ray emission from laser produced Au plasma under low-pressure nitrogen atmosphere”
   C. John, M. Kishimoto, T. Johzaki, T. Higashiguchi, N. Kakunaka, Y. Matsumoto, N. Hasegawa, M. Nishikino, T. Ejima, A. Sunahara, T. Endo, and S. Namba, Optics Letters, Vol. 44, Issue 6,   pp. 1439-1442 (2019).

• “Deep-hole drilling of amorphous silica glass by extreme ultraviolet femtosecond pulses” 
  Tatsunori Shibuya, Takashi Takahashi, Kazuyuki Sakaue, Thanh-Hung Dinh, Hiroyuki Hara, Takeshi Higashiguchi, Masahiko Ishino, Yuya Koshiba, Masaharu Nishikino, Hiroshi Ogawa, Masahito Tanaka, Masakazu Washio, Yohei Kobayashi, and Ryunosuke Kuroda, Applied Physics Letters 113, 171902(2018).

• “Spectral dynamics of soft x-ray emission in dual laser-produced medium-Z plasma” 
  Hayato Ohashi, Hiroyuki Hara, Goki Arai, Tadashi Hatano, Takeo Ejima, Chihiro Suzuki, Shinichi Namba,  Akira Sasaki, Masaharu Nishikino, Gerry O’Sullivan, and Takeshi Higashiguchi, Applied Physics B, Vol. 124, 193 (pp. 1-6) (2018).

• “Study of damage structure formation on aluminum film targets by picosecond soft X-ray laser ablation around threshold region”
  Masahiko Ishino, Nail A. Inogamov, Satoshi Tamotsu, Vasily V. Zhakhovsky, Noboru Hasegawa, Igor Yu. Skobelev, Anatoly Ya. Faenov, Tatiana A. Pikuz, Katsuhiro Mikami, Tetsuya Kawachi, Masaharu Nishikino Applied Physics A (2018) 124:649.

• “Intense water-window soft x-ray emission by spectral control using dual laser pulses” 
  Goki Arai, Hiroyuki Hara, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Hayato Ohashi, Shinichi Namba,  Atsushi Sunahara, Akira Sasaki, Masaharu Nishikino, Gerry O’Sullivan, and Takeshi Higashiguchi, Optics Express  Vol. 26, Issue 21, pp. 27748-27756 (2018).

• Emission of water-window soft x-rays under optically thin conditions using low-density foam targets,
   Hiroyuki Hara, Hiromu Kawasaki, Toshiki Tamura, Tadashi Hatano, Takeo Ejima, Weihua Jiang, Hayato Ohashi, Shinichi Namba, Atsushi Sunahara, Akira Sasaki, Masaharu Nishikino, Gerry O’Sullivan, and Takeshi Higashiguchi, Optics Letters 43, 3750-3753 (2018).

• “High power Laser Facilities in Kansai Photon Science Institute”
  K. Kondo, W. Utsumi, M. Kando, M. Nishikino, R. Itakura, H. Kiriyama
  Quantum Beam Science, 1(1), 7-1 - 7-12, 2017-06, DOI:10.3390/qubs1010007

• “Demonstration of 25-Hz-Inspection-Speed Laser Remote Sensing for Internal Concrete Defects”
  S. Kurahashi, K. Mikami, T. Kitamura, N. Hasegawa, H. Okada, S. Kondo, M. Nishikino, T. Kawachi, Y. Shimada
  Journal of Applied Remote Sensing, 12(1), 015009-1 - 015009-10, 2018-01,
  DOI:10.1117/1.JRS.12.015009

• “Burst intensification by singularity emitting radiation in multi-stream flows”
  A. S. Pirozhkov, T. Zh. Esirkepov, T. A. Pikuz, A. Ya. Faenov, K. Ogura, Y. Hayashi,
  H. Kotaki, E. N. Ragozin D. Neely, H. Kiriyama, J. K. Koga, Y. Fukuda, A. Sagisaka, M. Nishikino, T. Imazono, N. Hasegawa, T. Kawachi P. R. Bolton, H. Daido, Y. Kato, K. Kondo, S. V. Bulanov & M. Kando, Scientific Reports, 7, 17968-1 - 17968-10, 2017-12, DOI:10.1038/s41598-017-17498-5

• “Effect of plasma formation on the double pulse laser excitation of cubic silicon carbide”
  T. Otobe, T. Hayashi and M. Nishikino
  Applied Physics Letters, 111(17), 171107-1 - 171107-4, 2017-10, DOI:10.1063/1.4997363

• “Flash-lamp-pumped 4 J, 50 Hz Nd: YAG nanosecond laser system for mobile and transportable equipment”
  K. Mikami, N. Hasegawa, H. Okada, S. Kondo, M. Nishikino, T. Kawachi
  Japanese Journal of Applied Physics, 56(8), 082701-1 - 082701-6, 2017-08, DOI:10.7567/JJAP.56.082701

• “トンネル覆工コンクリート検査に向けたレーザー打音検査用小型高出力高繰り返しレーザー装置の開発”
  岡田 大,長谷川 登,三上 勝大,近藤 修司,錦野 将元,河内 哲哉
  レーザー研究,45(7), 427 - 432, 2017-07

• "Observation of fs-laser spallative ablation using soft X-ray laser probe"
• M. Nishikino, N. Hasegawa, T. Tomita, Y. Minami, T. Eyama, N. Kakimoto, R. Izutsu,
  M. Baba, T. Kawachi, T. Suemoto
  Proc. SPIE 10091, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XXII, 100910O (March 14, 2017); doi:10.1117/12.2255725
  　　
• "Formation of x-ray Newton’s rings from nano-scale spallation shells of metals in laser ablation"
• M. Nishikino, N. Hasegawa, T. Tomita, Y. Minami, T. Eyama, N. Kakimoto, R. Izutsu,
  M. Baba, T. Kawachi, T. Suemoto
  AIP Advances, 7(1), 015311, 2017-01, DOI:10.1063/1.4975218
  　　
• "レーザーを利用したコンクリートの健全性検査の高速化技術の開発"
• 長谷川 登, 錦野 将元, 三上 勝大, 岡田 大, 近藤 修司, 河内 哲哉, 島田 義則, 倉橋 慎理, 北村 俊幸
  検査技術, 22(3), 57 - 61, 2017-03
  　　
• "超短パルス軟Ｘ線レーザープローブによるフェムト秒レーザーアブレーション初期過程の解明"
• 長谷川 登, 錦野 将元, 南 康夫, 馬場 基芳, 大西 直史, 伊藤 篤史, 河内 哲哉, 末元 徹
  第85回レーザ加工学会講演論文集, 179 - 182, 2017-06
  　　
• "Investigation of the ionization balance of bismuth-to-tin plasmas for the extreme ultraviolet light source based on a computer-generated collisional radiative model"
• A. Sasaki, A. Sunahara, K. Nishihara
  AIP advances, 6(10), 105002, 2016-11, DOI:10.1063/1.4964496
  　　
• "Study of optical emission during spallative ablation induced by soft x-ray laser pulses"
• M. Ishino, M. Nishikino, H. Hasegawa, M. Yamagiwa, T. Kawachi
  Springer Proceedings in Physics, 169, 405 - 409, 2016-04, DOI:10.1007/978-3-319-19521-6_53
  　　
• "Development of a flat-field spectrometer with a wideband Ni/C multilayer grating in the 1-3.5 keV range"
• T. Imazono
  AIP Conference Proceedings, 1741, 040044-1 - 040044-4, 2016-07, DOI:10.1063/1.4952916
  　　
• "Experimental evaluation of a method to enhance the diffraction efficiency by overcoating diamond-like carbon (DLC) on soft X-ray laminar-type gratings"
• T. Imazono, M. Koike, T. Nagano, H. Sasai, Y. Ohgami, S. Kuramoto, M. Terauchi, H. Takahashi,, S. Notoya, T. Murano, Eric M. Gullikson
  AIP Conference Proceedings, 1741, 040043-1 - 040043-4, 2016-07, DOI:10.1063/1.4952915
  　　
• "Simulation of discharge in insulating gas from initial partial discharge to growth of the stepped leader using the percolation model",
• A.
  Jpn. J. Appl. Phys. 55, 026101 (2016).
  　　
• ”Observation of dynamics and modification of solid surface using a picosecond soft x-ray laser”,
• M. Nishikino, T. Kawachi, N. Hasegawa, M. Ishino, Y. Minami, T. Suemoto, N. Ohnishi, A. M. Ito,
  K. Sato, A. Y. Faenov, N. A. Inogamov, and M. Yamagiwa,
  Proceedings of SPIE 9589, 958902-1-7 (2015).
  　　
• "Low electron temperature in ablating materials formed by picosecond soft x-ray laser pulses"
• M. Ishino, N. Hasegawa, M. Nishikino, T. Pikuz, I. Skobelev, A. Faenov, N. Inogamov, T. Kawachi, and M. Yamagiwa
  Proceedings of SPIE 9589, 958904 (2015).
  　　
• Very low electron temperature in warm dense matter formed by focused picosecond soft x-ray laser pulses
• M. Ishino, N. Hasegawa, M. Nishikino, T. Pikuz, I. Skobelev, 他4名
  J. Appl. Phys. 116, 183302-1-6 (2014).
  　　
• X-ray laser plasma amplifier
• M. Nishikino and T. Kawachi
  Nat. Photonics, 8, 352–354 (2014).
  Development of a soft X-ray flat-field spectrograph in the 50-4000 eV range and its application to electron microscopes, T. Imazono, OYO BUTURI, 83, 288–292 (2014) (in Japanese).
  　　
• Observations of surface modifications induced by the multiple pulse irradiation using a soft
• picosecond x-ray laser beam
  M. Ishino, A. Y. Faenov, M. Tanaka, S. Tamotsu, (M. Nishikino), 他4名
  Appl. Phys. A., 110, 179-188 (2013).

Paper in collaboration study

• "Design of a prototype split-and-delay unit for XFEL pulses, and their evaluation by synchrotron radiation X-rays"J. Sakamoto, K. Ohwarda, M. Ishino, J. Mizuki, M. Ando, and K. Namikawa
• Journal of Synchrotron Radiation, 24, 95 - 102, 2017-01, DOI:10.1107/S1600577516017744
• 高密度プラズマによるＸ線レーザーの屈折効果　-Ｘ線による蜃気楼現象の観測-
  FAENOV Anatoly, 石野 雅彦, 石野 雅彦, 河内 哲哉
  プラズマ・核融合学会誌, 92(7), 523 - 529, 2016-07
• "Numerical demonstration of high-Z doping scheme on ignition-relevant scale implosion"
  T. Shiroto, N. Ohnishi, A. Sunahara, S. Fujioka, Akira Sasaki
  Physics of Plamas, 23(12), 122705, 2017-01, DOI:10.1063/1.4972546
• "Evaluation of a flat-field grazing incidence spectrometer for highly charged ion plasma emission in soft x-ray spectral region from 1 to 10 nm"
  T-H Dinh, Y. Kondo, T. Tamura1, Y. Ono, H. Hara, H. Oikawa, Y. Yamamoto, M. Ishino, M. Nishikino, T. Makimura, P. Dunne, G. O’Sullivan, S. Ohta, K. Kitano, T. Ejima, T. Hatano, and T. HigashiguchiReview of Scientific Instruments, 87(12), 123106-1 - 123106-7, 2016-12, DOI:10.1063/1.4971421
• "Coherent X-ray beam metrology using 2D high-resolution Fresnel-diffraction analysis"
  M. Ruiz-Lopez, A. Faenov, T. Pikuz,, N. Ozaki,, A. Mitrofanov, B. Albertazzi, N. Hartley, T. Matsuoka, Y. Ochante, Y. Tange, T. Yabuuchi, T. Habara, K. A. Tanaka, Y. Inubushi, M. Yabashi, M. Nishikino, T. Kawachi, S. Pikuz, T. Ishikawa, R. Kodama
  Journal of Synchrotron Radiation, 24, 196 - 204, 2017-01, DOI:10.1107/s1600577516016568
• "X-ray coherent mirage: Generation of phase – matched coherent point source in plasma media by propagated X-ray laser seeded beam"
  A.Ya. Faenov, T.A. Pikuz, S.A. Magnitskiy, N. Nagorskiy, M. Tanaka, M. Ishino, M. Nishikino, M. Kando, R. Kodama, Y. Kato and T. KawachiLaser and Particle Beams, 34(3), 402 - 411, 2016-09, DOI:10.1017/s0263034616000288
• "Characteristics of the soft X-ray emission from laser-produced highly charged platinum plasmas"
  H. Hara, G. Arai, Y. Kondo, T-H Dinh, P. Dunne, G. O'Sullivan, T. Ejima, T. Hatano, W. Jiang, M. Nishikino, A.Sasaki, A. Sunahara, T. Higashiguchi
  Applied Physics Express, 9(6), 066201, 2016-05, DOI:10.7567/Apex.9.066201　
• "Hydrodynamics driven by ultrashort laser pulse: simulations and the optical pump - X‑ray probe experiment"
  N. A. Inogamov, V. V. Zhakhovsky, N. Hasegawa, M. Nishikino, M. Yamagiwa, M. Ishino, M. B. Agranat, S. I. Ashitkov, A. Ya. Faenov, V. A. Khokhlov, D. K. Ilnitsky, Yu. V. Petrov, K. P. Migdal, T. A. Pikuz, S. Takayoshi, T. Eyama, N. Kakimoto, T. Tomita, M. Baba, Y. Minami, T. Suemoto, and T. Kawachi, ,
  Applied Physics B 119, 413–419 (2015).
• Non-thermal effects on femtosecond laser ablation of polymers extracted from the oscillation of time-resolved reflectivity
  T. Kumada, H. Akagi, R. Itakura, T. Otobe, M. Nishikino, A. Yokoyama,Appl. Phys. Lett. 106, 221605-1-5 (2015).
• Polarization of amplified spontaneous emission in a plasma active medium
  B.M. Kim, H. Stiel, B. Matous, M. Nishikino, N. Hasegawa, et al.
  Phys. Rev. A 92, 043807-1-7 (2015).
• Construction of a magnetic bottle spectrometer and its application to pulse duration measurement of X-ray laser using a pump-probe method
• S. Namba, N. Hasegawa, M. Kishimoto, M. Nishikino, M. Ishino, and T. Kawachi,
  AIP Advances 5, 117101 (2015).
• A laser-plasma–produced soft X-ray laser at 89 eV generates DNA double-strand breaks in human cancer cells”
  K. Sato, M. Nishikino, T. Kawachi, T. Shimokawa, T. Imai, T. Teshima, H. Nishimura, and M. Kando
  J. Radiat. Res. 56, 633-638 (2015).
• Temporal bevavior of unresolved transition array mission in water window soft x-ray spectral region from multiply charged ions
  T-H. Dinh, Y. Suzuki, G. Arai, P. Dunnne, G. O'Sullivan, S. Fujioka, N. Hasegawa, T. Kawachi, M. Nishikino, and T. Higashiguchi,
  Appl. Phys. Lett. 107, 121101-1-5 (2015).
• 3D visualization of XFEL beam focusing properties using LiF crystal X-ray detector
  T. Pikuz, A. Faenov, T. Matsuoka, S. Matsuyama, K. Yamauchi, N. Ozaki, B. Albertazzi, Y. Inubushi, M. Yabashi, L. Tono, Y. Sato, H. Yumoto,H. Ohashi, S. Pikuz, A. N. Grum-Grzhimailo, M. Nishikino, T. Kawachi, T. Ishikawa, and R. Kodama,
  Sci. Rep. 5, 17713-10(2015).
• Submicron scale image observation with a grazing incidence reflection-type single-shot soft X-ray microscope, M. Baba, M. Nishikino, N. Hasegawa, T. Tomita, Y. Minami, R. Takei, M. Yamagiwa, T. Kawachi and T. Suemoto,
  Jpn. J. Appl. Phys., 53, 080302 (2014).

Press release

• Development of the High Speed Inspection System of Defects Inside Concrete ,
  January 11th, 2016
• インフラの長寿命化を支える先進レーザー診断技術の開発－トンネルなどの保守保全作業の自動化に道筋－
  December 2nd, 2016

Award

• Masato Koike, Masaru Koeda, Takashi Imazono, Commendation for Science and Technology by the Minister of Education, Culture, Sports, Science and Technology Ministry of Education, Culture, Sports, Science and Technology-JAPAN (Mext),
  April 17th, 2015