Suppressing longitudinal double-layer oscillations by using elliptically polarized laser pulses in the hole-boring radiation pressure acceleration regime
Abstract
It is shown that well collimated mono-energetic ion beams with a large particle number can be generated in the hole-boring radiation pressure acceleration regime by using an elliptically polarized laser pulse with appropriate theoretically determined laser polarization ratio. Due to the J × B effect, the double-layer charge separation region is imbued with hot electrons that prevent ion pileup, thus suppressing the double-layer oscillations. The proposed mechanism is well confirmed by Particle-in-Cell simulations, and after suppressing the longitudinal double-layer oscillations, the ion beams driven by the elliptically polarized lasers own much better energy spectrum than those by circularly polarized lasers.
- Publication:
-
Physics of Plasmas
- Pub Date:
- February 2013
- DOI:
- 10.1063/1.4791654
- arXiv:
- arXiv:1212.0314
- Bibcode:
- 2013PhPl...20b3102W
- Keywords:
-
- plasma light propagation;
- plasma oscillations;
- plasma pressure;
- plasma sheaths;
- plasma simulation;
- radiation pressure;
- 52.38.Kd;
- 52.40.Kh;
- 52.65.Rr;
- 52.35.Fp;
- Laser-plasma acceleration of electrons and ions;
- Plasma sheaths;
- Particle-in-cell method;
- Electrostatic waves and oscillations;
- Physics - Plasma Physics
- E-Print:
- 6 pages, 5 figures, Phys. Plasmas (2013) accepted