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Title: Coherent Terahertz Radiation at UVSOR-II

Abstract

Development of intense terahertz radiation source is progressing at UVSOR-II, based on the mechanism of coherent synchrotron radiation (CSR). The terahertz CSR has successfully been produced by two methods. When the storage ring is operated in the single bunch mode with a sufficiently high beam current, intense bursts of terahertz radiation are emitted. Micro-structures in the longitudinal density distribution of the electron bunches created by a beam instability may be the origin of the radiation. The duration of the bursts is typically 100 micro-seconds. The peak intensity is 10000 times higher than that of the normal synchrotron radiation. The bursts appear chaotically or quasi-periodically depending on the beam current with a typical interval of 10 milli-seconds. It has been also demonstrated that the terahertz CSR could be produced by the laser-bunch slicing method. The density modulation produced on the electron bunch by the laser is the origin of CSR. The repetition rate of the terahertz pulses is 1 kHz, which is same as the laser repetition rate. The intensity per pulse is 105 times higher than that of the normal SR.

Authors:
; ; ; ;  [1];  [2];  [3]
  1. UVSOR, Institute for Molecular Science, Myodaij-cho, Okazaki, 444-8585 (Japan)
  2. Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603 (Japan)
  3. Research Reactor Institute, Kyoto University, Kumatori-cho, Sennan-gun, Osaka, 590-0494 (Japan)
Publication Date:
OSTI Identifier:
21052619
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436008; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM BUNCHING; BEAM CURRENTS; DENSITY; DISTRIBUTION; ELECTRONS; EMISSION; KHZ RANGE; LASERS; MICROSTRUCTURE; MODULATION; PERIODICITY; PHOTON BEAMS; PULSES; STORAGE RINGS; SYNCHROTRON RADIATION; SYNCHROTRON RADIATION SOURCES; THZ RANGE

Citation Formats

Katoh, Masahiro, Hosaka, Masahito, Mochihashi, Akira, Shimada, Miho, Kimura, Shin-ichi, Takashima, Yoshifumi, and Takahashi, Toshiharu. Coherent Terahertz Radiation at UVSOR-II. United States: N. p., 2007. Web. doi:10.1063/1.2436008.
Katoh, Masahiro, Hosaka, Masahito, Mochihashi, Akira, Shimada, Miho, Kimura, Shin-ichi, Takashima, Yoshifumi, & Takahashi, Toshiharu. Coherent Terahertz Radiation at UVSOR-II. United States. doi:10.1063/1.2436008.
Katoh, Masahiro, Hosaka, Masahito, Mochihashi, Akira, Shimada, Miho, Kimura, Shin-ichi, Takashima, Yoshifumi, and Takahashi, Toshiharu. Fri . "Coherent Terahertz Radiation at UVSOR-II". United States. doi:10.1063/1.2436008.
@article{osti_21052619,
title = {Coherent Terahertz Radiation at UVSOR-II},
author = {Katoh, Masahiro and Hosaka, Masahito and Mochihashi, Akira and Shimada, Miho and Kimura, Shin-ichi and Takashima, Yoshifumi and Takahashi, Toshiharu},
abstractNote = {Development of intense terahertz radiation source is progressing at UVSOR-II, based on the mechanism of coherent synchrotron radiation (CSR). The terahertz CSR has successfully been produced by two methods. When the storage ring is operated in the single bunch mode with a sufficiently high beam current, intense bursts of terahertz radiation are emitted. Micro-structures in the longitudinal density distribution of the electron bunches created by a beam instability may be the origin of the radiation. The duration of the bursts is typically 100 micro-seconds. The peak intensity is 10000 times higher than that of the normal synchrotron radiation. The bursts appear chaotically or quasi-periodically depending on the beam current with a typical interval of 10 milli-seconds. It has been also demonstrated that the terahertz CSR could be produced by the laser-bunch slicing method. The density modulation produced on the electron bunch by the laser is the origin of CSR. The repetition rate of the terahertz pulses is 1 kHz, which is same as the laser repetition rate. The intensity per pulse is 105 times higher than that of the normal SR.},
doi = {10.1063/1.2436008},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}