Coherently enhanced radiation reaction effects in laser-vacuum acceleration of electron bunches

P. W. Smorenburg; L. P. J. Kamp; G. A. Geloni; O. J. Luiten

doi:10.1117/12.888860

25 May 2011 Coherently enhanced radiation reaction effects in laser-vacuum acceleration of electron bunches

P. W. Smorenburg, L. P. J. Kamp, G. A. Geloni, O. J. Luiten

Proceedings Volume 8079, Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles; 80790M (2011) https://doi.org/10.1117/12.888860
Event: SPIE Optics + Optoelectronics, 2011, Prague, Czech Republic

Abstract

The effects of coherently enhanced radiation reaction on the motion of subwavelength electron bunches in interaction with intense laser pulses are analyzed. The radiation reaction force behaves as a radiation pressure in the laser beam direction, combined with a viscous force in the perpendicular direction. Due to Coulomb expansion of the electron bunch, coherent radiation reaction takes effect only in the initial stage of the laser-bunch interaction while the bunch is still smaller than the wavelength. It is shown that this initial stage can have observable effects on the trajectory of the bunch. By scaling the system to larger bunch charges, the radiation reaction effects are strongly increased. On the basis of the usual equation of motion, this increase is shown to be such that radiation reaction may suppress the radial instability normally found in ponderomotive acceleration schemes, thereby enabling the full potential of laser-vacuum electron bunch acceleration to GeV energies. However, the applicability of the used equation of motion still needs to be validated experimentally, which becomes possible using the presented experimental scheme. For full details, see our paper [P. W. Smorenburg et al., Laser and Particle Beams 28, pp. 553-562, 2010].

Citation Download Citation

P. W. Smorenburg, L. P. J. Kamp, G. A. Geloni, and O. J. Luiten "Coherently enhanced radiation reaction effects in laser-vacuum acceleration of electron bunches", Proc. SPIE 8079, Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles, 80790M (25 May 2011); https://doi.org/10.1117/12.888860

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KEYWORDS

Radiation effects

Pulsed laser operation

Laser scattering

Scattering

Thomson scattering

Fourier transforms

Laser applications

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