This axisymmetric simulation shows the behaviour of an advanced target design. The fuel is in the small spherical cavity in the middle and the projectile (not visible) hits the target from the top. The two bigger cavities, in axisymmetric geometry a torus, initially protect the smaller one from the impact shockwave. They collapse, producing further shockwaves higher in pressure than the original impact. These shockwaves focus on the small cavity and create a quasi-cylindrical convergence.