PAC2013 - List of Authors (Uesaka, M.)

Paper

Title

Page

Development of Yb Laser For High Power Ultra-Short Pulse

1094

Y. Matsumura, K. Koyama
University of Tokyo, Tokyo, Japan
M. Uesaka
The University of Tokyo, Nuclear Professional School, Ibaraki-ken, Japan
M. Yoshida, X. Zhou
KEK, Ibaraki, Japan

Funding: A part of this research is sponsored by KAKENHI, Grants-in-Aid for Scientic Research(C)24510120.
Passively mode-locked Yb lasers can easily generate femtosecond pulse at high repetition rate. The Yb lasers also have a property of high efficiency, which enables us to obtain high power laser. Because of these characteristics, the Yb lasers have been applied to many fields such as optical frequency comb and X-ray generation. Now, femtosecond pulse of much higher energy at high repetition rate is being required for dielectric laser accelerator (DLA) and lasertron. We have developed high power mode-locked Yb laser, and achieved 20W mode-locked Yb fiber laser amplification system at repetition rate of 62MHz. At the conference, our latest results will be reported.

Slides THOBA4 [6.414 MB]

THPSM02

Simulation of X-band Linac Neutron Source

1391

K. Tagi
University of Tokyo, Tokyo, Japan
K. Dobashi, T. Fujiwara, M. Uesaka
The University of Tokyo, Nuclear Professional School, Ibaraki-ken, Japan
M. Yamamoto
Accuthera Inc., Kawasaki, Kanagawa, Japan

In Tokyo University, there is a plan of development of electron linac neutron source because the research reactor “Yayoi” was decommissioned and a new neutron source is required. This linac will be introduced in the core of the reactor, so measurement of nuclear fuel materials can be expected. The application of this research is to measure more accurate nuclear data of some atomic fuel materials. It is necessary for analyzing debris in Fukushima 1st nuclear power plant. 30 MeV X-band linac is used and neutrons are generated by interactions between bremsstrahlung x-rays and materials. In this research, the thermal electron gun, the buncher and the target for the linac are optimized for generating as many neutrons as possible. Uranium can be used as target materials, so high neutron flux was gained from the calculation.

Paper	Title	Page
THOBA4	Development of Yb Laser For High Power Ultra-Short Pulse	1094
	Y. Matsumura, K. Koyama University of Tokyo, Tokyo, Japan M. Uesaka The University of Tokyo, Nuclear Professional School, Ibaraki-ken, Japan M. Yoshida, X. Zhou KEK, Ibaraki, Japan
	Funding: A part of this research is sponsored by KAKENHI, Grants-in-Aid for Scientic Research(C)24510120. Passively mode-locked Yb lasers can easily generate femtosecond pulse at high repetition rate. The Yb lasers also have a property of high efficiency, which enables us to obtain high power laser. Because of these characteristics, the Yb lasers have been applied to many fields such as optical frequency comb and X-ray generation. Now, femtosecond pulse of much higher energy at high repetition rate is being required for dielectric laser accelerator (DLA) and lasertron. We have developed high power mode-locked Yb laser, and achieved 20W mode-locked Yb fiber laser amplification system at repetition rate of 62MHz. At the conference, our latest results will be reported.
	Slides THOBA4 [6.414 MB]

THPSM02	Simulation of X-band Linac Neutron Source	1391
	K. Tagi University of Tokyo, Tokyo, Japan K. Dobashi, T. Fujiwara, M. Uesaka The University of Tokyo, Nuclear Professional School, Ibaraki-ken, Japan M. Yamamoto Accuthera Inc., Kawasaki, Kanagawa, Japan
	In Tokyo University, there is a plan of development of electron linac neutron source because the research reactor “Yayoi” was decommissioned and a new neutron source is required. This linac will be introduced in the core of the reactor, so measurement of nuclear fuel materials can be expected. The application of this research is to measure more accurate nuclear data of some atomic fuel materials. It is necessary for analyzing debris in Fukushima 1st nuclear power plant. 30 MeV X-band linac is used and neutrons are generated by interactions between bremsstrahlung x-rays and materials. In this research, the thermal electron gun, the buncher and the target for the linac are optimized for generating as many neutrons as possible. Uranium can be used as target materials, so high neutron flux was gained from the calculation.