Transverse stimulated Raman scattering in tripler of ICF driver for long pulse

When the laser driver for ICF works in the case of 3ns long pulse, the effect of transverse stimulated Raman scattering in tripler is more significant than that in the case of short pulse. This paper studies the damage of transverse stimulated Raman scattering in KD*P is compared with that in KDP and the relation between the effect of transverse stimulated Raman scatterin and gain coefficient. Therefore, it poesents theoretical evidences for choosing which type of crystal as tripler.