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RIKEN SPring-8 Center Laser Acceleration Development Team

Team Leader: Tomonao Hosokai (D.Sc.)

Research Summary

omonao  Hosokai

Laser Acceleration Development Team study the laser driven electron acceleration and its key technologies, aiming for the realization of compact, stable and reliable high-energy electron accelerators. We develop GeV-class multi-staged Laser Wake-Field Acceleration (LWFA) with plasma photonic devices formed by well-controlled plasmas, and also proceed application researches of high-energy and ultra-short electron beams from LWFA, such as laser-driven XFEL and ultra-fast electron imaging.

Main Research Fields

  • Interdisciplinary Science & Engineering

Related Research Fields

  • Mathematical & Physical Sciences
  • Engineering
  • Quantum beam science
  • Plasma science
  • Applied physics


  • Laser-driven Particle Acceleration
  • Laser Wake-field
  • Ultra-high-gradient Accelerator
  • Ultra-short electron beam
  • Pulse Power Engineering

Selected Publications

Papers with an asterisk(*) are based on research conducted outside of RIKEN.

  • 1. N. Pathak, A. Zhidkov, Y. Sakai, Z. Jin, and T. Hosokai.:
    "Charge coupling in multi-stage laser wakefield acceleration"
    Phys. of Plasmas, 27, 033106 (2020)
  • 2. A. Zhidkov, N. Pathak, J. Koga, H. Kai, M. Kando, T. Hosokai.:
    "Characterization of ionization injection in gas mixtures irradiated by subpetawatt class laser pulses"
    Phys. Rev. Research, 2, 013216 (2020)
  • 3. Z.Jin, H. Nakamura, N. Pathak, Y. Sakai, A. Zhidkov, K. Sueda, R. Kodama, T. Hosokai.:
    "Coupling Effects in Multi-Stage Laser Wake-field Acceleration of Electrons"
    Scientific Reports, 9, 20045 (2019)
  • 4. N. Pathak, A. Zhidkov, T. Hosokai and R. Kodama.:
    "Spectral effects in the propagation of chirped laser pulses in uniform underdense plasma"
    Phys. Plasmas, 25, 1, 013119 (2018)
  • 5. Y. Sakai, N. Pathak, Z.Jin, A. Zhidkov, K. Sueda, H. Toran, Y. Tanizawa, T. Otsuka, j. Ogino, H. Nakamura, R. Kodama, T. Hosokai.:
    "Narrow band and energy selectable plasma cathode for multi-stage laser wake-field acceleration"
    Phys. Rev. ST Accel. Beams, 21, 10, 101301 (2018)
  • 6. *N. Nakanii, T. Hosokai, K. Iwasa, S. Masuda, A. Zhidkov, N. Pathak, H. Nakahara, Y. Mizuta, N. Takeguchi, and R. Kodama.:
    "Transient magnetized plasma as an optical element for high power laser pulses"
    Phys. Rev. ST Accel. Beams, 18(2), 021303_1-6 (2015)
  • 7. *T.Hosokai, A.Zhidkov, A.Yamazaki, Y.Mizuta, M.Uesaka, and R.Kodama.:
    "Electron energy boosting in laser-wake-field acceleration with external magnetic field B〜 1T and laser prepulses."
    Applied Physics Letters, 96(12), 121501-1_3 (2010)
  • 8. *N. Hafz, T. M. Jeong, I. W. Choi, S. K. Lee, K. H. Pae, V. Kulagin, J. H. Sung, T. J. Yu, K.-H. Hong, H. T. Kim, T. Hosokai, J. Cary , Y.-C. Noh, D.-K. Ko, and J. Lee.:
    "Stable generation of GeV class electron beams from self- guided laser-plasma channels."
    Nature Photonics, 2, 571 (2008)
  • 9. *T. Hosokai, K. Kinoshita,A. Zhidkov, A. Maekawa, A.Yamazaki, M. Uesaka.:
    "Effect of external static magnetic field on the emittance and total charge of electron beams generated by laser wake field acceleration."
    Physical Review Letters, 97, 075004 (2006)
  • 10. *T.Hosokai, M.Kando, H.Dewa, H.Kotaki, S.Kondo, K.Horioka, and K.Nakajima.:
    "Optical guidance of terrawatt laser pulses by the implosion phase of fast Z-pinch discharge in a gas-filled capillary."
    Optics Letters, 25,10 (2000)


Related Links

Lab Members

Principal investigator

Tomonao Hosokai
Team Leader

Contact Information

1-1-1 Kouto,
Sayo-cho, Sayo-gun,
Hyogo, 679-5148 Japan
Email: hosokai [at] sanken.osaka-u.ac.jp