A conical area of shock tube (202) generates a sector of spherical shock waves, divergent conventional emanating radially from an effective point source of a non-focusing but highly directional manner. A compression head (208) having a radius of curvature equal to its separation from the top of the sector of shock tube defines the leading edge of a '' cap shock '' (306) of an intensity that we can predict and control precisely. A leakage rarefaction front (314) of the cap shock (306) is defined by the diffraction caused by the edge (312) of the tube (202) sector shock. The depletion edge (314) progressively erodes the shock cap (306) when it is projected towards the target calculation (128) defining the width and length of propagation of shock cap (306). The shock cap (306) sprayed uniformly the calculation target (128) by applying a relatively small amount of shock wave with respect to the larger number (of the order of magnitude twice as large) of shocks used in methods known shockwave focused ellipsoidal.
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