Efficient Fusion Neutron Generation Using a 10-TW High-Repetition Rate Diode-Pumped Laser

Yoneyoshi KITAGAWA; Yoshitaka MORI; Ryohei HANAYAMA; Shinichiro OKIHARA; Kazuhisa FUJITA; Katsuhiro ISHII; Toshiyuki KAWASHIMA; Nakahiro SATO; Takashi SEKINE; Ryo YASUHARA; Masaru TAKAGI; Naoki NAKAMURA; Yasushi MIYAMOTO; Hirozumi AZUMA; Tomoyoshi MOTOHIRO; Tatsumi HIOKI; Hirofumi KAN

doi:10.1585/pfr.6.1306006

Letters

Efficient Fusion Neutron Generation Using a 10-TW High-Repetition Rate Diode-Pumped Laser

Yoneyoshi KITAGAWA, Yoshitaka MORI, Ryohei HANAYAMA, Shinichiro OKIHARA, Kazuhisa FUJITA, Katsuhiro ISHII, Toshiyuki KAWASHIMA, Nakahiro SATO, Takashi SEKINE, Ryo YASUHARA, Masaru TAKAGI, Naoki NAKAMURA, Yasushi MIYAMOTO, Hirozumi AZUMA, Tomoyoshi MOTOHIRO, Tatsumi HIOKI, Hirofumi KAN

Author information

Yoneyoshi KITAGAWA
The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Yoshitaka MORI
The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Ryohei HANAYAMA
The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Shinichiro OKIHARA
The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Kazuhisa FUJITA
The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Katsuhiro ISHII
The Graduate School for the Creation of New Photonics Industries, 1955-1 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Toshiyuki KAWASHIMA
Development Bureau, Hamamatsu Photonics K.K., 1820 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Nakahiro SATO
Development Bureau, Hamamatsu Photonics K.K., 1820 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Takashi SEKINE
Development Bureau, Hamamatsu Photonics K.K., 1820 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Ryo YASUHARA
Development Bureau, Hamamatsu Photonics K.K., 1820 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Masaru TAKAGI
Development Bureau, Hamamatsu Photonics K.K., 1820 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan
Naoki NAKAMURA
Advanced Material Engineering Div., TOYOTA Motor Corporation, 1200 Mishuku, Susono 410-1193, Japan
Yasushi MIYAMOTO
Advanced Material Engineering Div., TOYOTA Motor Corporation, 1200 Mishuku, Susono 410-1193, Japan
Hirozumi AZUMA
TOYOTA Central Research and Development Laboratories, Inc., 41-1 Yokomichi, Nagakute-cho, Aichi 480-1192, Japan
Tomoyoshi MOTOHIRO
TOYOTA Central Research and Development Laboratories, Inc., 41-1 Yokomichi, Nagakute-cho, Aichi 480-1192, Japan
Tatsumi HIOKI
TOYOTA Central Research and Development Laboratories, Inc., 41-1 Yokomichi, Nagakute-cho, Aichi 480-1192, Japan
Hirofumi KAN
Development Bureau, Hamamatsu Photonics K.K., 1820 Kurematsu-cho, Nishi-ku, Hamamatsu 431-1202, Japan

Keywords: laser-diode(LD)- pumped laser, ICF roadmap, DD fusion neutron, neutron source

JOURNAL FREE ACCESS

2011 Volume 6 Pages 1306006

DOI https://doi.org/10.1585/pfr.6.1306006

Details

Abstract

The first use of a high-repetition-rate laser-diode (LD)-pumped laser in a fusion target experiment is demonstrated. An LD-pumped Nd-solid state laser's output is coupled to a Ti:sapphire laser, enabling the resulting HAMA laser to generate 2-J, 815-nm-wavelength output with a pulse width of 150 fs and a repetition rate of 10 Hz. A photon-to-photon efficiency of 1.25% (electric-to-photonic 0.7%) is achieved, which is an order of magnitude higher than that of current flash-lamp lasers. Irradiation of a 500-µm-thick deuterated polystyrene film by a 0.6-J pulse yielded 10⁵ DD fusion neutrons. The efficiency from the electric input to the neutron yield is 10 times higher than the flash-lamp-pumped table-top lasers.

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