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光量子ビーム科学研究部

高強度場科学研究G

掲載日：2024年7月1日更新
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グループリーダー　小瀧 秀行

研究の概要

世界トップクラスの高強度レーザーであるJ-KAREN-Pレーザーなどの技術開発を基盤として、電子やイオンのレーザー加速開発を含む高強度物理など学術の最先端を目指した研究を行っています。

高強度場科学とは？


​レーザー光は小さく絞ることができます。カメラのフラッシュのように短い時間だけ光るレーザーをパルスレーザーと呼び、瞬間的な光の強さはさらに大きくなります。図1には、集光強度と電場を表し、そこで展開される研究テーマ（の一部）を示しました。主にレーザーを用いた粒子加速（量子ビーム生成）を行っていますが、高強度場では究極的には真空を歪めたり（真空の複屈折）、真空を壊したり（真空破壊）を目指して新しい領域を開拓しようとしています。このような強度では、宇宙の謎や、物理学の基礎的な問題の解決にアプローチできると信じています。

図1. 高強度場科学

メンバー

小瀧　秀行 グループリーダー
エシロケポフ　ティムル 上席研究員
ピロジコフ アレキサンダー 上席研究員
中新　信彦 主幹研究員
近藤　康太郎 主任研究員
黄　開 主任研究員
今　亮 主幹技術員
守田 利昌 技術員
大東　出 派遣職員
西内 満美子 上席研究員（併任）
森　道昭 上席研究員（併任）
林　由紀雄 上席技術員（併任）
コーガ ジェームズ 研究員（併任）

 

主な研究内容

  1. レーザー駆動量子ビーム源の研究
    　高出力・極短パルスレーザーを小さく集光することで高強度場を作り、高エネルギーのイオン、電子、X線などの量子ビーム源の生成高度化の研究を行っています。イオン加速では、「量子メス」という新しい概念のもと、がん治療用重粒子線加速器を小型化する研究、先端科学に用いる重粒子イオンの加速法や計測器の開発を進めています。
    　電子加速では、小型のX線自由電子レーザーやガンマ線源などの量子ビーム生成のための研究を行なっています。　
     コヒーレント・アト秒・X線パルス生成を目指して、Burst Intensification by Singularity Emitting Radiation (BISER)という新しい放射機構の研究や、相対論的飛翔鏡（Relativistic Flying Mirror）も研究しています。
      レーザー電子加速の模式図
  2. 高強度レーザーによる新しい科学分野「超高強度場科学」の開拓
    　高強度レーザー（J-KAREN）により1022 W/cm2という高い強度が実現されています。このような高い強度やそれ以上の強度で起こる現象について理論的、数値的、実験で迫る研究を進めています。
    　​私たちのグループでは、放射減衰効果に着目して、大強度・短パルスのガンマ線（X線）の放射を理論・数値的に示しました。今では高強度場科学の大きなテーマの一つに成長し、世界中で研究されています。
  3. 世界トップクラスの高強度レーザー（J-KAREN-P）の改良・高度化
    　先端レーザー科学研究グループと共同で、世界トップクラスの高強度レーザーの改良・高度化の研究開発を行っています。30Jのレーザーエネルギーを30フェムト秒（1フェムトは1000兆分の1）の時間に閉じ込めることにより1000兆ワットの超高強度を実現できます。（写真は、強力な励起レーザーの光で緑色に光っています。）

    主な研究内容の画像1

研究トピックス

・相対論的飛翔鏡の研究

業績リスト（論文、受賞、プレス発表等）

  1. 論文［査読付き論文］

 

2023

  • Controllable electron self-injection in laser wakefield acceleration with symmetric gas-jet profile
    Zhenzhe Lei,  Zhan Jin,  Alexei Zhidkov,  Naveen Pathak,  Yoshio Mizuta,  Kai Huang, Nobuhiki Nakanii,  Izuru Daito,  Masaki Kando,  Tomonao Hosokai
    Progress of Theoretical and Experimental Physics, 2023 (3), 033J01 (2023).
    https://doi.org/10.35848/1882-0786/ac5237

 

  • Precise pointing control of high-energy electron beam from laser wakefield acceleration using an aperture
    Nobuhiko Nakanii, Kai Huang, Kotaro Kondo, Hiromitsu Kiriyama and Masaki Kando
    Appl. Phys. Express 16, 026001 (2023).
    https://doi.org/10.35848/1882-0786/acb892
  • Enhanced ion acceleration from transparency-driven foils demonstrated at two ultraintense laser facilities
    Nicholas P. Dover, Tim Ziegler, Stefan Assenbaum, Constantin Bernert, Stefan Bock, Florian-Emanuel Brack, Thomas E. Cowan, Emma J. Ditter, Marco Garten, Lennart Gaus, Ilja Goethel, George S. Hicks, Hiromitsu Kiriyama, Thomas Kluge, James K. Koga, Akira Kon, Kotaro Kondo, Stephan Kraft, Florian Kroll, Hazel F. Lowe, Josefine Metzkes-Ng, Tatsuhiko Miyatake, Zulfikar Najmudin, Thomas Püschel, Martin Rehwald, Marvin Reimold, Hironao Sakaki, Hans-Peter Schlenvoigt, Keiichiro Shiokawa, Marvin E. P. Umlandt, Ulrich Schramm, Karl Zeil & Mamiko Nishiuchi
    Light: Science & Applications 12, 71 (2023).
    https://doi.org/10.1038/s41377-023-01083-9
  • Spectral-temporal measurement capabilities of third-order correlators
    Stefan Bock, Thomas Oksenhendler, Thomas Püschel, René Gebhardt, Uwe Helbig, Richard Pausch, Tim Ziegler, Constantin Bernert, Karl Zeil, Arie Irman, Toma Toncian, Hiromitsu Kiriyama, Mamiko Nishiuchi, Akira Kon, and Ulrich Schramm
    Optics Express, 31 (6), 9923-9934 (2023). 
    https://doi.org/10.1364/OE.475575

2022

  • Experimental demonstration of 7-femtosecond electron timing fluctuation in laser wakefield acceleration
    Kai Huang, Zhan Jin, Nobuhiko Nakanii, Tomonao Hosokai, Masaki Kando
    Appl. Phys. Exp. 15, 036001 (2022).
    https://doi.org/10.35848/1882-0786/ac5237
  • Prospects of Relativistic Flying Mirrors for Ultra-High-Field Science
    Masaki Kando, Alexander S. Pirozhkov, James K. Koga, Timur Zh. Esirkepov and Sergei V. Bulanov
    Photonics 9, 862 (2022) [Review].
    https://doi.org/10.3390/photonics9110862
  • Characteristics of laminar ion beams accelerated via a few-joule laser pulse
    Toshimasa Morita
    Phys. Review Research 4, 043020 (2022).
    https://doi.org/10.1103/PhysRevResearch.4.043020
  • Enhanced diagnostics of radiating relativistic singularities and BISER by nonlinear post-compression of optical probe pulse
    A.V. Kotov, T.Zh. Esirkepov, A.A. Soloviev, A. Sagisaka, K. Ogura, A. Bierwage, M. Kando, H. Kiriyama, M.V. Starodubtsev, E.A. Khazanov, S.Yu. Mironov and A.S. Pirozhkov
    Journal of Instrumentation 17, P07035 (2022).
    https://doi.org/10.1088/1748-0221/17/07/P07035
  • Nanoscale subsurface dynamics of solids upon high-intensity femtosecond laser irradiation observed by grazing-incidence x-ray scattering
    Lisa Randolph, Mohammadreza Banjafar, Thomas R. Preston, Toshinori Yabuuchi, Mikako Makita, Nicholas P. Dover, Christian Rödel , Sebastian Göde, Yuichi Inubushi, Gerhard Jakob, Johannes Kaa, Akira Kon, James K. Koga, Dmitriy Ksenzov, Takeshi Matsuoka, Mamiko Nishiuchi, Michael Paulus, Frederic Schon, Keiichi Sueda, Yasuhiko Sentoku, Tadashi Togashi, Michael Bussmann, Thomas E. Cowan, Mathias Kläui, Carsten Fortmann-Grote, Lingen Huang, Adrian P. Mancuso, Thomas Kluge, Christian Gutt, and Motoaki Nakatsutsumi
    Phys. Rev. Res. 4, 033038 (2022).
    https://doi.org/10.1103/PhysRevResearch.4.033038
  • Characterization of the plasma mirror system at the J-KAREN-P facility
    Akira Kon, Mamiko Nishiuchi, Yuji Fukuda, Kotaro Kondo, Koichi Ogura, Akito Sagisaka, Yasuhiro Miyasaka, Nicholas P. Dover, Masaki Kando, Alexander S. Pirozhkov, Izuru Daito, Liu Chang, Il Woo Choi, Chang Hee Nam, Tim Ziegler, Hans-Peter Schlenvoigt, Karl Zeil, Ulrich Schramm, and Hiromitsu Kiriyama
    High Power Laser Science and Engineering, 10, e25 (2022).
    https://doi.org/10.1017/hpl.2022.15
  • Construction of a Magnetic Bottle Electron Spectrometer for Electron Energy Measurement in BISER X-Rays and Xe Interaction
    Hikari OHIRO, Alexander S. PIROZHKOV, Koichi OGURA, Akito SAGISAKA, Tatiana A. PIKUZ, Kai HUANG, Masaki KANDO, Kotaro YAMASAKI and Shinichi NAMBA
    Plasma and Fusion Research, 17, 2406020 (2022).
    https://doi.org/10.1585/pfr.17.2406020
  • Facilities in Asia for future accelerator development
    M. Kando, T. Hosokai, K. Y. Kim, and C. Tang
    Journal of Instrumentation, 17 T06001 (2022) [Technical Report]
    https://doi.org/10.1088/1748-0221/17/06/T06001

2021

  • Relativistic flying laser focus by a laser-produced parabolic plasma mirror
    Tae Moon Jeong, Sergei V. Bulanov, Petr Valenta, Georg Korn, Timur Zh. Esirkepov, James K. Koga, Alexander S. Pirozhkov, Masaki Kando, and Stepan S. Bulanov
    Phys. Rev. A 104, 053533 (2021). https://doi.org/10.1103/PhysRevA.104.053533
  • Gamma factory searches for extremely weakly interacting particles​s
    Sreemanti Chakraborti, Jonathan L. Feng, James K. Koga, and Mauro Valli, 
    Phys. Rev. D 104, 055023 (2021). https://doi.org/10.1103/PhysRevD.104.055023
  • Denoising application for electron spectrometer in laser-driven ion acceleration using a Simulation-supervised Learning based CDAE 
    Tatsuhiko Miyatake, Keiichiro Shiokawa, Hironao Sakaki, Nicholas P. Dover, Mamiko Nishiuchi, Hazel F. Lowe, Kotaro Kondo, Akira Kon, Masaki Kando, Kiminori Kondob, Yukinobu Watanabe
    Nucl. Instru. Meth. A 999, 165227 (2021). https://doi.org/10.1016/j.nima.2021.165227
  • Proton beam quality enhancement by spectral phase control of a PW-class laser system 
    T. Ziegler, D. Albach, C. Bernert, S. Bock, F.-E. Brack, T. E. Cowan, N. P. Dover, M. Garten, L. Gaus, R. Gebhardt, I. Goethel, U. Helbig, A. Irman, H. Kiriyama, T. Kluge, A. Kon, S. Kraft, F. Kroll, M. Koeser, J. Metzkes-Ng, M. Nishiuchi, L. Obst-Huebl, T. Püschel, M. Rehwald, H.-P. Schlenvoigt, U. Schramm, & K. Zeil
    Scientific Reports 11, 7338 (2021). https://www.nature.com/articles/s41598-021-86547-x

   2020

  • Characterization of Accumulated B-Integral of Regenerative Amplifier Based CPA Systems
    S. Bock, F. M. Herrmann, T. Püschel, U. Helbig, R. Gebhardt, J. J. Lötfering, R. Pausch, K. Zeil, T. Ziegler, A. Irman, T. Oksenhendler, A. Kon, M. Nishuishi, H. Kiriyama, K. Kondo, T. Toncian, and U. Schramm, Crystals 10, 1 (2020)
    https://doi.org/10.3390/cryst10090847
  • Relativistic Flying Forcibly Oscillating Reflective Diffraction Grating
    Jie Mu, T. Zh. Esirkepov, Petr Valenta, Yanjun Gu, Tae Moon Jeong, Alexander S. Pirozhkov, James K. Koga, Masaki Kando, Georg Korn, and Sergei V. Bulanov, Phys. Rev. E, 102, 053202 (2020). https://doi.org/10.1103/PhysRevE.102.053202
  • Electron-Positron Pair Creation in the Electric Fields Generated by Micro-bubble Implosions 
    James K. Koga, Masakatsu Murakami, Alexey V. Arefiev, Yoshihide Nakamiya, Stepan S. Bulanov, Sergei V. Bulanov, Physics Letters A　384, 126854 (2020). 
    https://doi.org/10.1016/j.physleta.2020.126854
  • Ion species discrimination method by linear energy transfer measurement in Fujifilm BAS-SR Imaging Plate
    M. Nishiuchi, H. Sakaki, N. P. Dover, T. Miyahara, K. Shiokawa, S. Manabe, T. Miyatake, Ko. Kondo, Ke. Kondo, Y. Iwata, Y. Watanabe, and Ki. Kondo , Rev. Sci. Instru. 91, 093305 (2020). 
    https://doi.org/10.1063/5.0016515
  • High intensity laser driven oxygen source from CW laser heated Ti tape targets
    Kotaro Kondo, Mamiko Nishiuchi, Hironao Sakaki, Nicholas P. Dover, Hazel F. Lowe, Takumi Miyahara, Yukinobu Watanabe, Tim Ziegler, Karl Zeil, Ulrich Schramm, Emma J. Ditter, George S. Hicks, Oliver C. Ettlinger, Zulfikar Najmudin, Hiromitsu Kiriyama, Masaki Kando and Kiminori Kondo, Crystals 10, 837 (2020). 
    https://doi.org/10.3390/cryst10090837
  • Topological investigation of laser ion acceleration
    T. Morita, Plasma Phys. Control. Fusion 62, 105003 (2020).
    https://dx.doi.org/10.1088/1361-6587/aba766
  • New algorithm using L1 regularization for measuring electron energy spectra
    Hironao Sakaki, Tomohiro Yamashita, Takashi Akagi, Mamiko Nishiuchi, Nicholas P. Dover, Hazel F. Lowe, Kotaro Kondo, Akira Kon, Masaki Kando, Yasuhiko Tachibana, Takayuki Obata, Keiichiro Shiokawa, Tatsuhiko Miyatake, and Yukinobu Watanabe, Review of Scientific Instruments 91, 075116 (2020).
    https://doi.org/10.1063/1.5144897
  • Single-shot electro-optic sampling on the temporal structure of laser wakefield accelerated electrons
    Kai Huang, Hideyuki Kotaki, Michiaki Mori, Yukio Hayashi, Nobuhiko Nakanii and Masaki Kando, Crystals 2020, 10(8), 640 (2020).
    https://doi.org/10.3390/cryst10080640
  • Single-shot measurement of post-pulse-generated pre-pulse
    Akira Kon, Mamiko Nishiuchi, Hiromitsu Kiriyama, Masaki Kando, Stefan Bock, Tim Ziegler, Thomas Pueschel, Karl Zeil, Ulrich Schramm and Kiminori Kondo, Crystals, 10(8), 657 (2020).
    https://doi.org/10.3390/cryst10080657
  • Dynamics of laser-driven heavy-ion acceleration clarified by ion charge states
    M. Nishiuchi, N. P. Dover, M. Hata, H. Sakaki, Ko. Kondo, H. F. Lowe, T. Miyahara, H. Kiriyama, J. K. Koga, N. Iwata, M. A. Alkhimova, A. S. Pirozhkov, A. Ya. Faenov, T. A. Pikuz, A. Sagisaka, Y. Watanabe, M. Kando, K. Kondo, E. J. Ditter, O. C. Ettlinger, G. S. Hicks, Z. Najmudin, T. Ziegler, K. Zeil, U. Schramm and Y. Sentoku, Phys. Rev. Research 2, 033081 (2020).
    https://doi.org/10.1103/PhysRevResearch.2.033081
  • Status and progress of the J-KAREN-P high intensity laser system at QST
    Hiromitsu Kiriyama, Alexander, S. Pirozhkov, Mamiko Nishiuchi, Yuji Fukuda, Koichi Ogura, Akito Sagisaka, Yasuhiro Miyasaka, Hironao Sakaki, Nicholas P. Dover, Kotaro Kondo, Hazel F. Lowe, Akira Kon, James K. Koga, Timur Zh. Esirkepov, Nobuhiko Nakanii, Kai Huang, Masaki Kando, Kiminori Kondo, High Energy Density Physics 36, 100771 (2020). https://doi.org/10.1016/j.hedp.2020.100771 
  • Observation of Burst Intensification by Singularity Emitting Radiation generated from relativistic plasma with a high-intensity laser
    A. Sagisaka, K. Ogura, T. Zh. Esirkepov, D. Neely, T. A. Pikuz, J. K. Koga, Y. Fukuda, H. Kotaki, Y. Hayashi, B. Gonzalez-Izquierdo, K. Huang, S. V. Bulanov, H. Kiriyama, K. Kondo, T. Kawachi, M. Kando, A. S. Pirozhkov, High Energy Density Physics, 36, 100751 (2020). https://doi.org/10.1016/j.hedp.2020.100751
  • Light scattering by 4π-spherically-focused ultra-strong light field
    Tae Moon Jeong, Sergey Bulanov, Pavel V. Sasorov, Georg Korn, James Kevin Koga, Stepan S. Bulanov, Phys. Rev. A 28 (9), pp. 13991–14006 (2020).https://doi.org/10.1364/OE.387654
  • Recoil effects on reflection from relativistic mirrors in laser plasmas
    P. Valenta, T. Zh. Esirkepov, J. K. Koga, A. S. Pirozhkov, M. Kando, T. Kawachi, Y.-K. Liu, P. Fang, P. Chen, J. Mu, G. Korn, O. Klimo, and S. V. Bulanov, Physics of Plasmas 27, 032109 (2020). https://doi.org/10.1063/1.5142084
  • Optical probing of relativistic plasma singularities
    Timur Zh. Esirkepov, Jie Mu, Yanjun Gu, Tae Moon Jeong, Petr Valenta, Ondrej Klimo, James K. Koga, Masaki Kando, David Neely, Georg Korn, Sergei V. Bulanov, and Alexander S. Pirozhkov, Physics of Plasmas 27, 052103 (2020). https://doi.org/10.1063/5.0004525
  • Characterization of ionization injection in gas mixtures irradiated by subpetawatt class laser pulses
    A. Zhidkov, N. Pathak, J. K. Koga, K. Huang, M. Kando, and T. Hosokai, Phys. Rev. Research 2, 013216 (2020). https://doi.org/10.1103/PhysRevResearch.2.013216
  • Effect of Small Focus on Electron Heating and Proton Acceleration in Ultrarelativistic Laser-Solid Interactions
    N. P. Dover, M. Nishiuchi, H. Sakaki, Ko. Kondo, M. A. Alkhimova, A. Ya. Faenov, M. Hata, N. Iwata, H. Kiriyama, J. K. Koga, T. Miyahara, T. A. Pikuz, A. S. Pirozhkov, A. Sagisaka, Y. Sentoku, Y. Watanabe, M. Kando, and K. Kondo, Phys. Rev. Lett. 124, 084802 (2020). https://doi.org/10.1103/PhysRevLett.124.084802

 

   2019年

  • Variation in electron emission time in weakly nonlinear laser wakefield acceleration
    K. Huang, H. Kotaki, M. Mori, T. Esirkepov, J. K. Koga, Y. Hayashi, N. Nakanii, S. V. Bulanov, and M. Kando, Phys. Rev. Accel. Beams 22, 121301 (2019). https://doi.org/10.1103/PhysRevAccelBeams.22.121301
  • Multiple colliding laser pulses as a basis for studying high-field high-energy physics
    J. Magnusson, A. Gonoskov, M. Marklund, T. Zh. Esirkepov, J. K. Koga, K. Kondo, M. Kando, S. V. Bulanov, G. Korn, C. G. R. Geddes, C. B. Schroeder, E. Esarey, and S. S. Bulanov, Phys. Rev. A 100, 063404 (2019). https://doi.org/10.1103/PhysRevA.100.063404
  • The Utility of Applying Various Image Preprocessing Strategies to Reduce the Ambiguity in Deep Learning-based Clinical Image Diagnosis
    Yasuhiko Tachibana, Takayuki Obata, Jeff Kershaw, Hironao Sakaki, Takuya Urushihata, Tokuhiko Omatsu, Riwa Kishimoto, Tatsuya Higashi, Magnetic Resonance in Medical Sciences (2019). https://doi.org/10.2463/mrms.mp.2019-0021
  • Probing and possible application of the QED vacuum with micro-bubble implosions induced by ultra-intense laser pulses
    James K. Koga, Masakatsu Murakami, Alexey V. Arefiev, Yoshihide Nakamiya, ", Matter and Radiation at Extremes, 4 (3), 034401 (2019).  https://aip.scitation.org/doi/10.1063/1.5086933
  • Relativistic proton emission from ultrahigh-energy-density nanosphere generated by microbubble implosion
    M. Murakami, A. V. Arefiev, M. A. Zosa, J. K. Koga, Y. Nakamiya, Physics of Plasmas 26, 043112 (2019). https://doi.org/10.1063/1.5093043

 

   2018年

  • High-contrast high-intensity repetitive petawatt laser
    Hiromitsu Kiriyama, Alexander S. Pirozhkov, Mamiko Nishiuchi, Yuji Fukuda, Koichi Ogura, Akito Sagisaka, Yasuhiro Miyasaka, Michiaki Mori, Hironao Sakaki, Nicholas P. Dover, Kotaro Kondo, James K. Koga, Timur Zh. Esirkepov, Masaki Kando, and Kiminori Kondo, Optics Letters 43 (11), pp. 2595-2598 (2018). https://doi.org/10.1364/OL.43.002595
  • Relativistically upshifted higher harmonic generation via relativistic flying mirrors
    James. K Koga, Sergei V. Bulanov, Timur Zh. Esirkepov, Masaki Kando, Stepan S. Bulanov and Alexander S. Pirozhkov,  Plasma Physics and Controlled Fusion 60 (7), 074007 (2018). https://doi.org/10.1088/1361-6587/aac068
    Corrigendum: Relativistically upshifted higher harmonic generation via relativistic flying mirrors (2018 Plasma Phys. Control. Fusion 60 074007)
    https://doi.org/10.1088/1361-6587/aad012
  • Coherent, Short-Pulse X-ray Generation via Relativistic Flying Mirrors
    Masaki Kando, Timur Zh. Esirkepov, James K. Koga, Alexander S. Pirozhkov and Sergei V. Bulanov, Quantum Beam Science 2 (2), 9 (2018) [Review]; https://doi.org/10.3390/qubs2020009
  • On annihilation of the relativistic electron vortex pair in collisionless plasmas
    K. V. Lezhnin, F. F. Kamenets, T. Zh. Esirkepov and S. V. Bulanov, Journal of Plasma Physics 84 (6), 905840610 (2018); https://doi.org/10.1017/S0022377818001162

 

   2017年

  • Possible Precise Measurement of Delbrück Scattering Using Polarized Photon Beams
    James K. Koga and Takehito Hayakawa, Phys. Rev. Lett. 118, 204801 (2017). https://doi.org/10.1103/PhysRevLett.118.204801
  • High resolution X-ray spectra of stainless steel foils irradiated by femtosecond laser pulses with ultra-relativistic intensities
    M. A. Alkhimova, A. Ya. Faenov, I. Yu. Skobelev, T. A. Pikuz, M. Nishiuchi, H. Sakaki, A. S. Pirozhkov, A. Sagisaka, N. P. Dover, Ko. Kondo, K. Ogura, Y. Fukuda, H. Kiriyama, K. Nishitani, T. Miyahara, Y. Watanabe, S. A. Pikuz, M. Kando, R. Kodama, and K. Kondo, Optics Express 25 (23), pp. 29501-29511 (2017); https://doi.org/10.1364/OE.25.029501
  1. プレス発表

 

共同研究

  • 大阪大学産業科学研究所
  • 大阪大学レーザー科学研究所
  • Helmholtz Zentrum Dresden Rossendorf (HZDR), Germany
  • ELI Beamlines, Czech Republic
  • ELI Nuclear Physics, Romania

 

外部資金

  • ​未来社会創造事業（2017年~現在）

 

 

関西光量子科学研究所

光量子ビーム科学研究部