Prerequisites:

Description:

    This is the technology of using a fission explosive or other high-energy device to initiate fusion in a clump of fusile volatile material, but without any technology to contain the fusion reaction.  The result is a runaway cascade fusion reaction which can produce an explosion far larger than what is possible with fission explosives.
    An example of an alternate high-energy fusion initiation device is the "pinch field" in Larry Niven's novel Protector, ie a force field capable of temporarily confining a chunk of the material in a very small space, thus increasing its temperature and pressure to the point where fusion will naturally occur.  Fusion explosives without the use of fission initiation devices could well be far more radioactively "clean" (depending on the specific technology and which isotopes are used), meaning that it does not increase the radioactivity of its environment very much (at least compared to fission explosives).