Masahiro Okamura

Social Implementation

Masahiro Okamura

Specially Appointed Professor

Accelerator Physics(Ion sources and linear accelerators)

Research Projects

  • Development of Siberian Snake magnets for polarized proton beam acceleration.

  • Invention of direct plasma injection scheme.

  • World record of the most intense heavy ion beam through RFQ linac.

  • Development of laser ion source for multiple species.


  • Snake-spin (RIKEN)

  • New Laser Ion Source for Brookhaven Accelerators Exceeds Expectations (BNL)

1995 - 2006

Postdoc & Researcher, RIKEN

Visiting Scientist, BNL

2006 -

Physicist, BNL

2018 -

Specially Appointed Professor, Institute of Innovative Research, Tokyo Institute of Technology


Brightness award; Gold (ICIS) (2011)


Science & Technology Award (BNL) (2016)


Overcoming Depolarizing Resonances with Dual Helical Partial Siberian Snakes, H. Huang, L. Ahrens, M. Bai, K. Brown, E.D. Courant, C. Gardner, J.W. Glenn, F. Lin, A.U. Luccio, W.W. MacKay, M. Okamura, V. Ptitsyn, T. Roser, J. Takano, S. Tepikian, N. Tsoupas, A. Zelenski and K. Zeno, Physical Review Letters 99, 154801 (2007).


Laser ion source with solenoid field, T. Kanesue, Y. Fuwa, K. Kondo, M. Okamura, Applied Physics Letters 105, 193506 (2014).


Laser ion source for high brightness heavy ion beam, M. Okamura, Journal of Instrumentation 11 C09004 (2016)


Measurement of magnetic field fluctuations and diamagnetic currents within a laser ablation plasma interacting with an axial magnetic field, S. Ikeda, K. Horioka, M. Okamura, Journal of Applied Physics 122, 143303 (2017)


Laser ion source for heavy ion inertial fusion, M. Okamura, Material and Radiation at Extremes 3, 61-66 (2018)