IPAC2017 - List of Authors (Kan, K.)

Paper	Title	Page
THOAB3	Ultrafast Relativistic-Energy Electron Microscopy
	J. Yang, K. Kan, T. Kondoh, K. Tanimura, Y. Yoshida ISIR, Osaka, Japan N. Terunuma, J. Urakawa KEK, Ibaraki, Japan
	An ultrafast electron microscopy (UEM) using a relativistic-energy femtosecond-pulse electron beam has being developed at Osaka University. We succeeded to generate a 100-fs-pulse electron beam with energy of 3.1 MeV using a photocathode RF gun. In the demonstrations of UEM, we succeeded to observe the TEM imaging of polystyrene and gold nanoparticles by the accumulating measurement of 3.1-MeV femtosecond electron pulses. The relativistic-energy single-pulse electron imaging is also available under the low-magnification observation, i.e. 300 times. The UEM has also been succeeded for the study of the ultrafast structural dynamics in materials with the single-shot electron diffraction observation.
	Slides THOAB3 [12.396 MB]
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THPAB119	Study on a Time-Domain Spectroscopy System for Coherent Terahertz Pulse Spectrum Measurement from 5 MeV Electron Beam	4003
	R. Yanagisawa, T. Toida Waseda University, Tokyo, Japan K. Kan ISIR, Osaka, Japan K. Sakaue Waseda University, Waseda Institute for Advanced Study, Tokyo, Japan M. Washio RISE, Tokyo, Japan
	Funding: This work was supported by a research granted from The Murata Science Foundation and JSPS KAKENHI 26286083. Terahertz wave, expected to apply spectral analysis and imaging, has recently developed both source and detector components. For the terahertz source, the coherent radiation from electron linac is expected to be the high power terahertz source. At Waseda University, we have been studying high quality electron beam generation using Cs-Te photocathode RF-Gun and its application. We tried to generate terahertz wave by the coherent radiation and to measure its spectrum by a time-domain spectroscopy (TDS) technique. Adopting this technique, ultra-short laser pulse is needed as probe light. A terahertz waveform appears by delaying the timing of probe pulse. A spectrum of terahertz wave is also led by the waveform, by using the Fourier transform. We succeeded in constructing the probe laser system operating at 119 MHz repetition rate. The pulse duration was compressed down to 190 fs (FWHM) by using pulse compressor. We also succeeded in measuring a terahertz radiation from a photoconductive antenna. In this conference, we will report the outline of our terahertz TDS system, recent progress of our laser system, and terahertz wave generation and detection, with the future prospects.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB119
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Paper

Title

Page

THOAB3

Ultrafast Relativistic-Energy Electron Microscopy

J. Yang, K. Kan, T. Kondoh, K. Tanimura, Y. Yoshida
ISIR, Osaka, Japan
N. Terunuma, J. Urakawa
KEK, Ibaraki, Japan

An ultrafast electron microscopy (UEM) using a relativistic-energy femtosecond-pulse electron beam has being developed at Osaka University. We succeeded to generate a 100-fs-pulse electron beam with energy of 3.1 MeV using a photocathode RF gun. In the demonstrations of UEM, we succeeded to observe the TEM imaging of polystyrene and gold nanoparticles by the accumulating measurement of 3.1-MeV femtosecond electron pulses. The relativistic-energy single-pulse electron imaging is also available under the low-magnification observation, i.e. 300 times. The UEM has also been succeeded for the study of the ultrafast structural dynamics in materials with the single-shot electron diffraction observation.

Slides THOAB3 [12.396 MB]

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THPAB119

Study on a Time-Domain Spectroscopy System for Coherent Terahertz Pulse Spectrum Measurement from 5 MeV Electron Beam

4003

R. Yanagisawa, T. Toida
Waseda University, Tokyo, Japan
K. Kan
ISIR, Osaka, Japan
K. Sakaue
Waseda University, Waseda Institute for Advanced Study, Tokyo, Japan
M. Washio
RISE, Tokyo, Japan

Funding: This work was supported by a research granted from The Murata Science Foundation and JSPS KAKENHI 26286083.
Terahertz wave, expected to apply spectral analysis and imaging, has recently developed both source and detector components. For the terahertz source, the coherent radiation from electron linac is expected to be the high power terahertz source. At Waseda University, we have been studying high quality electron beam generation using Cs-Te photocathode RF-Gun and its application. We tried to generate terahertz wave by the coherent radiation and to measure its spectrum by a time-domain spectroscopy (TDS) technique. Adopting this technique, ultra-short laser pulse is needed as probe light. A terahertz waveform appears by delaying the timing of probe pulse. A spectrum of terahertz wave is also led by the waveform, by using the Fourier transform. We succeeded in constructing the probe laser system operating at 119 MHz repetition rate. The pulse duration was compressed down to 190 fs (FWHM) by using pulse compressor. We also succeeded in measuring a terahertz radiation from a photoconductive antenna. In this conference, we will report the outline of our terahertz TDS system, recent progress of our laser system, and terahertz wave generation and detection, with the future prospects.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB119

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)