Free-electron lasers using the Smith-Purcell effect

Wachtel, J.

doi:10.1063/1.325642

Cited by 84 publications

(12 citation statements)

References 13 publications

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“…Motivated by these facts, several groups are exploring alternative ways of producing THz radiation either based on low-energy (keVs) electron beams [3][4][5][6] or compact (MeVs) accelerators. [7][8][9][10][11] In this letter, we demonstrate the use of a 14-MeV pre-modulated electron beam to generate coherently enhanced transition radiation (TR).…”

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confidence: 99%

Observation of coherently enhanced tunable narrow-band terahertz transition radiation from a relativistic sub-picosecond electron bunch train

Piot

Sun

Maxwell

et al. 2011

Applied Physics Letters

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We experimentally demonstrate the production of narrow-band (df =f % 20% at f % 0:5 THz) transition radiation with tunable frequency over [0.37, 0.86] THz. The radiation is produced as a train of sub-picosecond relativistic electron bunches transits at the vacuum-aluminum interface of an aluminum converter screen. The bunch train is generated via a transverse-to-longitudinal phase space exchange technique. We also show a possible application of modulated beams to extend the dynamical range of a popular bunch length diagnostic technique based on the spectral analysis of coherent radiation.

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confidence: 99%

Observation of coherently enhanced tunable narrow-band terahertz transition radiation from a relativistic sub-picosecond electron bunch train

Piot

Sun

Maxwell

et al. 2011

Applied Physics Letters

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“…Smith−Purcell radiation [15]− [22]. In most of these analyses, the metallic waveguide with periodic corrugation behaves as a slow wave structure through which a slow space harmonic of a transverse magnetic (TM) Floquet mode is propagated.…”

Section: Many Theoretical Analyses Have Been Developed To Analyze Thementioning

confidence: 99%

A quantum mechanical analysis of Smith–Purcell free-electron lasers

Fares¹,

Yamada²

2015

Nuclear Instruments and Methods in Physics Research Section A:

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The paper presents a quantum mechanical treatment for analyzing the Smith−Purcell radiation generated by charged particles passing over a periodic conducting structure. In our theoretical model, the electrons interact with a surface harmonic wave excited near the diffraction grating when the electron velocity is almost equal to the phase velocity of the surface wave. Then, the surface harmonic wave is electromagnetically coupled to a radiation mode. The dynamics of electrons is analyzed quantum mechanically where the electron is represented as a traveling electron wave with a finite spreading length. The conversion of the surface wave into a propagating mode is analyzed using the classical Maxwell's equations. In the small−signal gain regime, closed−form expressions for the contributions of the stimulated and spontaneous emissions to the evolution of the surface wave are derived. The inclusion of the spreading length of the electron wave to the emission spectral line is investigated. Finally, we compare our results based on the quantum mechanical description of electron and those based on the classical approach where a good agreement is confirmed.

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“…In addition, the SPR is characterized by the presence of resonances at a series of frequencies, which again vary in inverse proportion to the period. Owing to these properties, it has been recognized that SPR can be a basic mechanism for a compact free-electron laser [3].…”

Section: Introductionmentioning

confidence: 99%

Theory of unconventional Smith-Purcell radiation in finite-size photonic crystals

Ochiai¹,

Ohtaka²

2006

Opt. Express

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Unusual emission of light, called the unconventional SmithPurcell radiation (uSPR) in this paper, was demonstrated from an electron traveling near a finite photonic crystal (PhC) at an ultra-relativistic velocity. This phenomenon is not related to the accepted mechanism of the conventional SPR and arises because the evanescent light from the electron has such a small decay constant in the ultra-relativistic regime that it works practically as a plane-wave probe entering the PhC from one end. We analyze the dependence of the SPR spectrum on the velocity of electron and on the parity of excited photonic bands and show, for PhCs made up of a finite number of cylinders, that uSPR probes the photonic band structure very faithfully.

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Free-electron lasers using the Smith-Purcell effect

Cited by 84 publications

References 13 publications

Observation of coherently enhanced tunable narrow-band terahertz transition radiation from a relativistic sub-picosecond electron bunch train

Observation of coherently enhanced tunable narrow-band terahertz transition radiation from a relativistic sub-picosecond electron bunch train

A quantum mechanical analysis of Smith–Purcell free-electron lasers

Theory of unconventional Smith-Purcell radiation in finite-size photonic crystals

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