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A promising candidate for a near-term low-cost inertial confinement fusion driver is the magnetic booster target concept. In it a small high density magnetically confined plasma and which serves as booster stage, is compressed and ignited by hypervelocity impact. The energy released in the magnetic booster stage, after being transformed into black body radiation, ablatively implodes a high gain second stage target and which releases most of the thermonuclear energy. Alternatively, the energy released in the booster stage can be also used to compress and ignite a target as in impact fusion. The importance of this concept is that it permits to drive the booster stage with a mass accelerator at a velocity of a few 10 km/sec, which is small compared to the velocity required for pure impact fusion, even though it is more than one order of magnitude larger than what can be directly reached with ordinary guns or high explosives. The required velocities can probably be reached by magnetic guns and by fluid dynamic methods through the implosion of cylindrical or spherical shells driven by light gas gun fired projectiles. In comparison to laser- or charged particle beam drivers, the initial driver power is several orders of magnitude smaller and which should lead to a substantial reduction in the driver cost.

The Magnetic Booster Target Inertial Confinement Fusion Driver