Speaker
Mr
Frank Mayet
(DESY, Hamburg, Germany & University of Hamburg, Germany)
Description
Laser-driven grating type DLA (Dielectric Laser Accelerator) structures have been shown to produce accelerating gradients on the order of GeV/m. In simple beta-matched grating structures - due to the nature of the laser induced steady-state in-channel fields - the per period forces on the particles are mostly in longitudinal direction. Even though strong transverse magnetic and electric fields are present, the net focusing effect over one period is negligible in the case of relativistic electrons. Stable acceleration of realistic electron beams in a DLA channel however requires the presence of significant net transverse forces. In this work we simulate and study the effect of using the transient temporal shape of short Gaussian drive laser pulses in order to achieve suitable field configurations for potentially stable acceleration of relativistic electrons in the horizontal plane. In order to achieve this, both the laser pulse and the grating geometry are optimized. Particle tracking simulations conducted with the Particle-In-Cell code VSim 7.2 are shown for both the transient and steady state/long pulse case.
Primary author
Mr
Frank Mayet
(DESY, Hamburg, Germany & University of Hamburg, Germany)
Co-authors
Dr
Ralph Assmann
(DESY)
Mr
Ulrich Dorda
(DESY)
Mr
Willi Kuropka
(DESY Hamburg, University of Hamburg)
