Linear and Nonlinear Thomson Scattering for Advanced X-ray Sources in PLASMONX

Abstract

Thomson scattering of laser pulses onto ultrarelativistic e-bunches is becoming an advanced source of tunable, quasimonochromatic, and ultrashort X/gamma radiation. Sources aimed at reaching a high flux of scattered photons need to be driven by high-brightness e-beams, whereas extremely short (femtosecond scale or less) sources need to make femtosecond-long e-beams that collide with the laser pulses. In this paper, we explore the performance of the PLASMONX TS source in several operating regimes, including preliminary results on a source based on e-bunches produced by laser wakefield acceleration and controlled injection via density downramp.Index Terms-Compton scattering, Thomson scattering (TS), X-ray sources.

Design and optimization of a highly efficient optical multipass system forγ-ray beam production from electron laser beam Compton scattering

“…To compute the γ-ray spectrum, one needs to take the electrons and laser beam spatiotemporal shape into account [1,[3][4][5]36]. For a given set of laser beam parameters, we can choose the electron beam beta function at the IP in order to optimize the γ-ray flux.…”

“…In the next section, we concentrate on the optimization of the TASD as defined in [5] and we use the expressions of [1,3,4] for numerical calculations. Accordingly, the TASD values for one pass obtained with the beam parameters of Table I are shown in Fig.…”

“…However, this physical process exhibits a small cross section: therefore the densities of laser photons and electrons in the collision point must be very high in order to generate a large number of γ-ray photons at each collisions, and the repetition rate of the collisions must be maximized in order to achieve high γ-ray fluxes. As extensively reported elsewhere [1][2][3][4][5] the phase space density of the electron beam and of the laser beam at the collision point are key issues for achieving high fluxes of gamma rays with very small bandwidths, as those typically requested by nuclear physics experiments and applications. In this article, we concentrate on the optical design of the interaction point (IP) of a Compton γ-ray machine which has been proposed for the European Extreme Light Infrastructure "Nuclear Pillar," i.e., the Gamma Beam System (ELI-NP-GBS) [1,3,4,6] project.…”

Demonstration of a high repetition rate capillary discharge waveguide

“…The high acceleration gradient possible with laserdriven plasma accelerators 1 and recent progress such as the production of high-quality GeV electron beams [2][3][4][5][6][7] has increased interest in laser-plasma accelerator technology as a driver for radiation sources, [8][9][10][11][12][13] and as a path towards a TeV-class linear collider 14,15 .…”

Dual color x-rays from Thomson or Compton sources

“…Considering negligible the correlations between the electrons that could give rise to collective effects [47,48], and in a linear or moderately nonlinear regime [49,50] generalization to an ensemble of electrons can be made by summing over the whole beam the contributions of the single particles. As regards the interacting field, Gaussian functions describe correctly the profiles, with the normalized electric field A L given by the expression…”