Broadband Free Electron Laser by the Use of Prebunched Electron Beam

Shibata, Yukio; Ishi, K.; Ono, Sachiko; Inoue, Yuta; Sasaki, Satoshi; Ikezawa, Mikihiko; Takahashi, Toshiharu; Matsuyama, Tomohiro; Kobayashi, Katsuhei; Fujita, Yoshiaki; Bessonov, E. G.

doi:10.1103/physrevlett.78.2740

Cited by 38 publications

(18 citation statements)

References 16 publications

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“…* Electronic address: alar@post.kek.jp Recent experimental observations of Stimulated Transition Radiation (STR) [4] and Stimulated Synchrotron Radiation (SSR) [5] show that STR and SSR have continuous spectra in contrast to the undulator radiation. Also the concept of a so-called "broadband FEL" based on STR has been proposed in [5]. In comparison with traditional FELs, where radiation of an accelerated charge is stimulated along its entire trajectory, in STR experiments [5][6][7] the radiation generated from target surfaces interacts with the pre-bunched electron beam.…”

Section: Introductionmentioning

confidence: 99%

“…Also the concept of a so-called "broadband FEL" based on STR has been proposed in [5]. In comparison with traditional FELs, where radiation of an accelerated charge is stimulated along its entire trajectory, in STR experiments [5][6][7] the radiation generated from target surfaces interacts with the pre-bunched electron beam. To ignite the stimulation process it is necessary to apply high external EM field strength at the radiating surface.…”

Section: Introductionmentioning

confidence: 99%

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Observation of the stimulated coherent diffraction radiation in an open resonator at LUCX facility

Aryshev

Araki

Fukuda

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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We present an initial test of a new type of a pre-bunched beam pumped free electron maser based on Stimulated Coherent Diffraction Radiation (SCDR) generated in an open resonator. An ultrafast Schottky Barrier Diode (time response < 1 ns) has enabled to investigate the properties of the radiation stored in the cavity as well as the intrinsic properties of the cavity itself. We observed a turn-by-turn SCDR generated by a multibunch beam. When the cavity length was exactly a half of the bunch spacing a clear resonance was observed. Moreover, turn-by-turn measurements revealed the cavity quality factor of 72.88, which was rather high for an open resonator in the wavelength range of 3 − 5 mm. An exponential growth of the photon intensity as a function of the number of bunches was also demonstrated.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Observation of the stimulated coherent diffraction radiation in an open resonator at LUCX facility

Aryshev

Araki

Fukuda

et al. 2014

Nuclear Instruments and Methods in Physics Research Section A:

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“…Substituting the values of 1 v uu r and n 1 from equations (5), (6) in equation (8), and keeping the value in the wave equation, we obtain …”

Section: Instability Analysismentioning

confidence: 99%

“…A high power microwave free electron laser experiment has been performed using pre-bunched electron beam of 35Mev [6]. Here when the electron beam is prebunched at a frequency close to an eigen frequency of the cavity, the oscillation build process is speed up and the radiation build time is shortened significantly.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Growth Rate of Electromagnetic Waves in Pre-bunched Cerenkov Free Electron Laser and Free Electron Laser

Bhasin¹,

Bhatia²

2012

IJCA

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An electron beam passing through a slow wave structure is unstable to an electromagnetic perturbation whose phase velocity equals the velocity of the beam. This phenomenon of cerenkov emission is the basis of all slow wave devices. The increase in the growth rate by using a pre-bunched electron beam in a Cerenkov free electron laser (CFEL) and Free electron laser (FEL) has been studied. We have compared the increase in growth rate with the increase in modulation index calculated at experimentally known CFEL and FEL parameters. KeywordsFree electron laser, Cerenkov free electron laser, Pre-bunched electron beam.

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Modeling of terahertz radiation emission from a free‐electron laser

Sharma

Panwar

Sharma

2017

Contrib. Plasma Phys

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In this article, we report the generation of terahertz (THz) radiation using the interaction of a laser-modulated relativistic electron beam (REB) with a surface plasma wave. Two laser beams propagating through the modulator interact with the REB, leading to velocity modulation of the beam. This results in pre-bunching of the REB. The pre-bunched beam travels through the drift space, where the velocity modulation translates into density modulation. The density-modulated beam, on interacting with the surface plasma pump wave, acquires an oscillatory velocity that couples with the modulated beam density to give rise to a nonlinear current density which acts as an antenna to give THz radiation. By optimizing the parameters of the beam and the wiggler, we obtain power of the order of 10 −4 using the current scheme. KEYWORDSfree-electron laser, surface plasma wave, terahertz radiation, wiggler 1

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Broadband Free Electron Laser by the Use of Prebunched Electron Beam

Cited by 38 publications

References 16 publications

Observation of the stimulated coherent diffraction radiation in an open resonator at LUCX facility

Observation of the stimulated coherent diffraction radiation in an open resonator at LUCX facility

Comparison of Growth Rate of Electromagnetic Waves in Pre-bunched Cerenkov Free Electron Laser and Free Electron Laser

Modeling of terahertz radiation emission from a free‐electron laser

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