Direct Acceleration of Electrons in a Corrugated Plasma Waveguide

Historically, direct acceleration of charged particles by electromagnetic fields has been limited by diffraction, phase matching, and material damage thresholds. A recently developed plasma micro-optic [B. Layer et al., Phys. Rev. Lett. 99, 035001 (2007)] removes these limitations and promises to allow high-field acceleration of electrons over many centimeters using relatively small femtosecond lasers. We present simulations that show a laser pulse power of 1.9 TW should allow an acceleration gradient larger than 80  MV/cm. A modest power of only 30 GW would still allow acceleration gradients in excess of 10  MV/cm.