Effects of laser and plasma parameters on shock wavegeneration and acceleration of protons

摘要

Collisionless electrostatic shock (CES) waves induced by laser-plasma interactionsrnare studied via a series of 1D and 2D particle-in-cell (PIC) simulations. Different targetrnthicknesses, plasma densities and laser intensities have been used to investigate the shockrncharacteristics, since all of them have significant effects on the absorption of the incident laserrnpulse and the electron temperature. An analytical model has been presented according tornmomentum conservation and considering the electrons' circulation. Thinner target, lower plasmarndensity and higher laser intensity help to obtain higher energy ions on condition that the CESrnis formed.