JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.47, no.4, pp.625 - 630
Abstract
A new version of the averaged particle-in-cell (aPIC) code has been developed to simulate the Raman backscatter (RBS) and the Raman backward laser amplification in plasmas. We observe in the aPIC simulations that the RBS coupling is weakened by the electron trapping, that is generated by wave-breaking, As a result, the amplification level is significantly reduced. In this paper, a physical interpretation of the trapping-induced RBS weakening is presented. In the numerical point of view, the new aPIC, which is a completely parallelized code, shows a parallelization efficiency that is notably improved from that of the semi-parallelized old aPIC.