Electron Rephasing in a Laser-Wakefield Accelerator

Electron Rephasing in a Laser-Wakefield Accelerator.

An important limit for energy gain in laser-plasma wakefield accelerators is the dephasing length, after which the electron beam reaches the decelerating region of the wakefield and starts to decelerate. Here, we propose to manipulate the phase of the electron beam in the wakefield, in order to bring the beam back into the accelerating region, hence increasing the final beam energy. This rephas...

Ultralow emittance electron beams from a laser-wakefield accelerator

Formation of Ultrarelativistic Electron Rings from a Laser-Wakefield Accelerator.

Ultrarelativistic-energy electron ring structures have been observed from laser-wakefield acceleration experiments in the blowout regime. These electron rings had 170-280 MeV energies with 5%-25% energy spread and ∼10  pC of charge and were observed over a range of plasma densities and compositions. Three-dimensional particle-in-cell simulations show that laser intensity enhancement in the wake...

Laser Wakefield Accelerator Experiments at LBNL

The status is presented of the laser wakefield acceleration research at the 1'OASIS laboratory of the Center for Beam Physics at LBNL. Experiments have been performed on laser driven production of relativistic electron beams from plasmas using a high repetition rate (10 Hz), high power (10 TW) Tksapphire (0.8 jim) laser system. Large amplitude plasma waves have been excited in the self-modulate...

Betatron Radiation of an Off-axis Injected Electron in a Laser Wakefield Accelerator

The electrons injected into a laser wakefield undergo betatron oscillation and give rise to the emission of intense X-ray radiation. To investigate the generation conditions of the X-rays, the relativistic motion of an electron injected in an off-axis position has been simulated with wakefield profiles which are pre-calculated with a two-dimensional particle-in-cell code. The wakefield with a p...