A totally new target scheme to exploit fusion reactions is presented. It is based on the propagation of a heat-detonation wave across the fuel that reaches fusion temperatures before expanding. The wave is launched from a small region of the target where fusion ignition temperatures are reached by the crash of cumulation jets. These jets are produced by a couple of hollow-charge conical liners placed close to the target. The collapse of each conical liner creates a dispersive supersonic jet with a specific kinetic energy high enough to ignite the small region of the target where the fusion wave is created. The energy gain can be very high, although it depends on the maximum fusion yield allowable in the reactor chamber.