Direct Electron Acceleration with Radially Polarized Laser Beams. - Varin, Charles; Payeur, Stééphane; Marceau, Vincent; Fourmaux, Sylvain; April, Alexandre; Schmidt, Bruno; Fortin, Pierre-Louis; Thiré, Nicolas; Brabec, Thomas; Légaré, François; Kieffer, Jean-Claude; Piché, Michel (Applied Sciences (2076-3417), 2013)