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Jpn. J. Appl. Phys. 46 (2007) pp. 7939-7944  |Previous Article| |Next Article|  |Table of Contents|
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Intense Terahertz Synchrotron Radiation by Laser Bunch Slicing at UVSOR-II Electron Storage Ring

Miho Shimada¹, Masahiro Katoh^1,2, Shin-ichi Kimura^1,2, Akira Mochihashi^1,2, Masahito Hosaka³, Yoshifumi Takashima³, Toru Hara^4,1, and Toshiharu Takahashi⁵

¹UVSOR Facility, Institute for Molecular Science, National Institutes of Natural Sciences, Okazaki, Aichi 444-8585, Japan
²School of Physical Sciences, The Graduate University for Advanced Studies (SOKENDAI), Okazaki, Aichi 444-8585, Japan
³Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
⁴RIKEN SPring-8 Center, RIKEN Harima Institute, Sayo, Hyogo 679-5148, Japan
⁵Research Reactor Institute, Kyoto University, Kumatori, Osaka 590-0494, Japan

(Received June 19, 2007; accepted September 4, 2007; published online December 6, 2007)

A laser bunch slicing system has been constructed at the UVSOR-II electron storage ring to produce a submillimeter-sized microstructure on an electron bunch. As its first result, terahertz coherent synchrotron radiation (THz CSR) was successfully produced by the dense structure of the electron bunch. Its intensity is higher by four or five orders of magnitude than that of normal synchrotron radiation. The intensity is proportional to the square of the peak current of the electron bunch, as expected for coherent emission. It is also demonstrated that the spectral shape of the THz CSR can be controlled by changing the slicing laser pulse duration.

URL: http://jjap.jsap.jp/link?JJAP/46/7939/
DOI: 10.1143/JJAP.46.7939

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