Laser scatter and re-scatter near the quarter critical surface

Under IFE relevant conditions, the high frequency hybrid instability where the backward going daughter wave can contain an electromagnetic component. Under these conditions, the scattered lights from the quarter-critical surface can themselves undergo re-scatter down near its own quarter critical surface. Going down the gradient, the laser encounters the quarter critical surface first and therefore the HFHI instability takes on an even bigger role under these conditions. Using 2D and 3D particle-in-cell simulations, we will investigate the scatter and re-scatter of laser near the quarter critical surface under IFE relevant conditions, and demonstrate the importance of these instabilities in current and future experiments.