Self-amplified spontaneous emission at wavelengths of 20 and 40 μm from single-bunch electron beams

Okuda, Shuichi; Ohkuma, J.; Kimura, Norio; Honda, Yoshihide; Okada, T.; Takamuku, Setsuo; Yamamoto, Tomohiko; Tsumori, K.

doi:10.1016/0168-9002(93)90017-c

Cited by 23 publications

(3 citation statements)

References 4 publications

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“…Because many organic compounds have unique absorptive and dispersive properties in the THz range, THz spectroscopy is often applied for material identification [2]. Intense monochromatic wave sources and broad-band wave sources, based on electron accelerators, have been developed for wavelengths in the THz range [3][4][5][6][7][8][9]. However, THz-wave sources based on shortpulse lasers have been developed recently [10,11], and then it has been possible to develop useful applications by using compact devices based on short-pulse laser technology.…”

Section: Introductionmentioning

confidence: 99%

Proposal of coherent Cherenkov radiation matched to circular plane wave for intense terahertz light source

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Proposal of coherent Cherenkov radiation matched to circular plane wave for intense terahertz light source

et al. 2015

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“…SASE experimental results were first obtained at long wavelength the mid eighties (saturated high gain amplification in the mm waves (34.6 GHz) in (Lawrence Livermore National Laboratory / Lawrence Berkeley Laboratory (USA) collaboration) [69], superradiant emission at 640 µm at MIT (USA) [70], observation of bunching at 8 mm [71] and SASE [72]) at CESTA (France). Then, SASE was observed in the infrared (20 − 40 µm at ISIR (Japan) [73], at SUNSHINE (USA) [74], at CLIO (France) in the mid-infrared (5 − 10 µm) [75], at BNL (USA) at 1064 and 633 nm [76], at Los Alamos (USA) at 15 µm [77]). Then five orders of magnitude of amplification and saturation at 12µm have been achieved (UCLA, Los Alamos, Stanford, Kurchatov collaboration) on the Advanced Free Electron Laser (AFEL) linac at the Los Alamos National Laboratory [78,79].…”

Section: Single Pass High Gain Regime Felmentioning

confidence: 99%

Towards compact Free Electron–Laser based on laser plasma accelerators

Couprie

2018

Nuclear Instruments and Methods in Physics Research Section A:

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The laser invention more than fifty years ago was a major scientific revolution. Among the different possible gain media, the Free Electron Lasers (FEL) uses free electrons in the period permanent magnetic field of an undulator, covering wavelengths from far infra red to X-ray, with easy tuneability and high peak power. Nowadays, the advent of tuneable intense (mJ level) short pulse FELs with record peak power (GW level) in the X-ray domain sets a major step in laser development, and enables to explore new scientific areas, such as deciphering molecular reactions in real time, understanding functions of proteins. Besides, lasers have also been considered for driving plasma electron acceleration. A high-power femtosecond laser is focused into a gas target and resonantly drives a nonlinear plasma wave in which plasma electrons are trapped and accelerated with high energy gain of GeV/m. Nowadays, laser wakefield acceleration became reality and electron beams with multi-GeV energies, hundreds pC charge, sub-percent energy spread and sub-milliradian divergence can be produced. It is relevant to consider a FEL application to quality these laser plasma produced electrons. After having described the FEL panorama, the strategies towards laser plasma based acceleration based FELs will be discussed, including the mitigation of the large energy spread and divergence of these beams should be mitigated.

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“…The mechanism of SASE was first explored in the infrared range [19,20,21,22,23]. The SASE FEL has now been widely operating in the X-ray range.…”

Section: Introductionmentioning

confidence: 99%

Construction and Commissioning of Mid-Infrared SASE FEL at cERL

Honda¹,

Adachi²,

Eguchi³

et al. 2021

Preprint

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The mid-infrared range is an important spectrum range where materials exhibit a characteristic response corresponding to their molecular structure. A free-electron laser (FEL) is a promising candidate for a high-power light source with wavelength tunability to investigate the nonlinear response of materials. Although the self-amplification spontaneous emission (SASE) scheme is not usually adopted in the mid-infrared wavelength range, it may have advantages such as layout simplicity, the possibility of producing a single pulse, and scalability to a short-wavelength facility. To demonstrate the operation of a mid-infrared SASE FEL system in an energy recovery linac (ERL) layout, we constructed an SASE FEL setup in cERL, a test facility of the superconducting linac with the ERL configuration. Despite the adverse circumstance of space charge effects due to the given boundary condition of the facility, we successfully established the beam condition at the undulators, and observed FEL emission at a wavelength of 20 µm. The results show that the layout of cERL has the potential for serving as a mid-infrared light source.

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Self-amplified spontaneous emission at wavelengths of 20 and 40 μm from single-bunch electron beams

Cited by 23 publications

References 4 publications

Proposal of coherent Cherenkov radiation matched to circular plane wave for intense terahertz light source

Proposal of coherent Cherenkov radiation matched to circular plane wave for intense terahertz light source

Towards compact Free Electron–Laser based on laser plasma accelerators

Construction and Commissioning of Mid-Infrared SASE FEL at cERL

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