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Dr. Hiromitsu Tomizawa Wins 11th Nishikawa Prize of Foundation for High Energy Accelerator Science (Topic)

Release Date
03 Mar, 2010
  • Award

Japan Synchrotron Radiation Research Institute

　The awarding ceremony of the 11th “Nishikawa Prize, Koshiba Prize and Suwa Prize” of the Foundation for High Energy Accelerator Science was held at Arcadia Ichigaya in Tokyo on 3 March 2010. These prizes are awarded to researchers who have made original and internationally acclaimed achievements in the research of high-energy accelerators or experimental equipment related to the use of accelerators. Hiromitsu Tomizawa, an associate senior scientist at the Accelerator Division of Japan Radiation Research Institute (JASRI), was awarded the 11th Nishikawa Prize. He was awarded this prize for his research project “High-Quality Laser Optical System for High-Brilliance Photocathode Electron Guns,” which contributed to the establishment of technologies related to the laser light source system for high-brilliance photocathode electron guns. Concretely, it includes (1) technologies to control the shape of photoelectron bunches, (2) technologies to highly stabilize the laser light source throughout one year, (3) pioneering research on the development of continuous-wave (CW) photocathode electron guns, and (4) pioneering research on the electrooptic (EO) sampling monitor for measuring femtosecond electron beam bunches, at the international level. Aiming at the realization of high-brilliance electron beams, Dr. Tomizawa developed the device technologies to optimize and measure the three-dimensional shape of a laser pulse irradiated onto photocathodes and completed a world-leading laser optical system utilizing these technologies. The technologies used to develop this system will significantly contribute to the realization of high-brilliance and ultrashort-pulse electron beams required for future radiation accelerators.


Dr. Hiromitsu Tomizawa in front of verification test equipment for the z-polarized photocathode electron guns he developed

Dr. Hiromitsu Tomizawa in front of verification test equipment for the z-polarized photocathode electron guns he developed


Awarding ceremony on 3 March 2010)

Awarding ceremony (at Arcadia Ichigaya in Tokyo on 3 March 2010)
Dr. Hiromitsu Tomizawa, front, second from left, with Dr. Masatoshi Koshiba, front, third from right, who won the 2002 Nobel Prize in Physics