Electron acceleration yb relativistic laser pulse on the front of solid targets

摘要

The mechanism of electron acceleration and estraction during propagation of an ultra-relativistic laser pulse in an underdense plasma in front of a solid target has been studied. When laser pulse reaches the target surface the accelerated electrons move forward inertially and gain high energy which scales proportionally to the laser intensity. The energy conversion efficiency into these electrons is approx n_e/2n_c if the plasma thickness exedds the laser pulse width. The backward electrons accelerated by the reflected light accumulate significantly higher energy though their total number is less.