FEL2019 - List of Authors (Shimada, M.)

Paper	Title	Page
TUD02	Application of Infrared FEL Oscillators for Producing Isolated Attosecond X-Ray Pulses via High-Harmonic Generation in Rare Gases	272
	R. Hajima, K. Kawase, R. Nagai QST, Tokai, Japan Y. Hayakawa, T. Sakai, Y. Sumitomo LEBRA, Funabashi, Japan T. Miyajima, M. Shimada KEK, Ibaraki, Japan H. Ohgaki, H. Zen Kyoto University, Kyoto, Japan
	Funding: Quantum Leap Flagship Program (MEXT Q-LEAP) High harmonic generation (HHG) in rare gases is now becoming a common technology to produce attosecond pulses in VUV wavelengths. So far HHG sources have been realized by femtosecond solid-state lasers, not FELs. We propose a FEL-driven HHG source to explore attosecond pulses at photon energies above 1 keV with a MHz-repetition, which is difficult with solid-state lasers [1]. A research program has been launched to establish technologies for the FEL-HHG, which covers generation and characterization of few-cycle IR pulses in a FEL oscillator, stacking of FEL pulses in an external cavity, and a seed laser for stabilization of carrier-envelope phase in a FEL oscillator. In this talk, we present the scheme of FEL-HHG and the status of the research program. [1] R. Hajima and R. Nagai, Phys. Rev. Lett. 119, 204802 (2017)
	Slides TUD02 [8.995 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-TUD02
About •	paper received ※ 23 August 2019 paper accepted ※ 29 August 2019 issue date ※ 05 November 2019
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THA03	IR-FEL Project at the cERL and Future EUV-FEL Lithography
	R. Kato, Y. Honda, H. Kawata, T. Miyajima, N. Nakamura, H. Sakai, M. Shimada, Y. Tanimoto, K. Tsuchiya KEK, Ibaraki, Japan
	Recently KEK has launched an infrared FEL project with a competitive funding from NEDO (New Energy and Industrial Technology Development Organization). The purpose of this project is to build a mid-infrared FEL at the compact Energy Recovery Linac (cERL), and to use that FEL as a light source for construction of the processing database required for industrial lasers. The FEL system is composed of two 3 m undulators and a matching section between them, and generates light with a maximum pulse energy of 1 µJ at the wavelength of 20 µm with an 81.25 MHz repetition rate. The FEL is also expected to become a proof-of-concept machine for ERL base FELs for future EUV lithography. The detail of the project will be presented, and the relationship of the technical development between the mid-infrared FEL and the future EUV-FEL will be discussed.
	Slides THA03 [5.424 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Application of Infrared FEL Oscillators for Producing Isolated Attosecond X-Ray Pulses via High-Harmonic Generation in Rare Gases

272

R. Hajima, K. Kawase, R. Nagai
QST, Tokai, Japan
Y. Hayakawa, T. Sakai, Y. Sumitomo
LEBRA, Funabashi, Japan
T. Miyajima, M. Shimada
KEK, Ibaraki, Japan
H. Ohgaki, H. Zen
Kyoto University, Kyoto, Japan

Funding: Quantum Leap Flagship Program (MEXT Q-LEAP)
High harmonic generation (HHG) in rare gases is now becoming a common technology to produce attosecond pulses in VUV wavelengths. So far HHG sources have been realized by femtosecond solid-state lasers, not FELs. We propose a FEL-driven HHG source to explore attosecond pulses at photon energies above 1 keV with a MHz-repetition, which is difficult with solid-state lasers [1]. A research program has been launched to establish technologies for the FEL-HHG, which covers generation and characterization of few-cycle IR pulses in a FEL oscillator, stacking of FEL pulses in an external cavity, and a seed laser for stabilization of carrier-envelope phase in a FEL oscillator. In this talk, we present the scheme of FEL-HHG and the status of the research program.
[1] R. Hajima and R. Nagai, Phys. Rev. Lett. 119, 204802 (2017)

Slides TUD02 [8.995 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2019-TUD02

About •

paper received ※ 23 August 2019 paper accepted ※ 29 August 2019 issue date ※ 05 November 2019

Export •

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

THA03

IR-FEL Project at the cERL and Future EUV-FEL Lithography

R. Kato, Y. Honda, H. Kawata, T. Miyajima, N. Nakamura, H. Sakai, M. Shimada, Y. Tanimoto, K. Tsuchiya
KEK, Ibaraki, Japan

Recently KEK has launched an infrared FEL project with a competitive funding from NEDO (New Energy and Industrial Technology Development Organization). The purpose of this project is to build a mid-infrared FEL at the compact Energy Recovery Linac (cERL), and to use that FEL as a light source for construction of the processing database required for industrial lasers. The FEL system is composed of two 3 m undulators and a matching section between them, and generates light with a maximum pulse energy of 1 µJ at the wavelength of 20 µm with an 81.25 MHz repetition rate. The FEL is also expected to become a proof-of-concept machine for ERL base FELs for future EUV lithography. The detail of the project will be presented, and the relationship of the technical development between the mid-infrared FEL and the future EUV-FEL will be discussed.

Slides THA03 [5.424 MB]

Export •

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