The non uniform laser profile of the laser beam is responsible for the density redistribution in the Plasma and in the region where intensity is locally higher the ponderomotive force pushes plasma away. Due to this, plasma refractive index seen by the laser beam also gets modified which leads to further focusing of the laser beam and hence enhancing the initial fluctuation in intensity profile. This positive feedback gives rise to instability which can create a hindrance in symmetrical compression of pallet in the laser driven ICF. So Both SRS and SBS along with the filamentation instability do greatly affect the ICF efficiency. Which process will be suppressed drastically and why?

Article Effect of laser beam filamentation on coexisting stimulated ...