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Fusion Science and Technology
Latest News
In transition: Commercializing fusion power
Commercial fusion power is closer than ever. There are now around 30 U.S. fusion companies, several of which claim to be on track to connect to the grid as early as the 2030s.
Tokamak and laser inertial confinement approaches benefit from decades of research at facilities such as the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory and ITER, with alternative concepts including stellarator, magnetic mirror, and Z-pinch confinement also making notable progress as private and government funding for fusion increases.
T. Kammash, D. L. Galbraith
Nuclear Science and Engineering | Volume 106 | Number 2 | October 1990 | Pages 156-159
Technical Paper | doi.org/10.13182/NSE90-A27467
Articles are hosted by Taylor and Francis Online.
A recently proposed, novel approach to inertial confinement fusion is examined as a potential source of fast neutrons. Known as the magnetically insulated inertial confinement fusion (MICF) system, it combines the favorable aspects of both magnetic and inertial fusions into one. In this approach, the hot fusion plasma is created inside a hollow spherical pellet whose inner walls are coated with deuterium-tritium fuel and ablated by a laser that enters the target through a hole. Physical containment of the plasma is provided by the metallic shell that surrounds the fuel, while its thermal energy is insulated from the wall by a strong, self-generated magnetic field. In contrast to implosion-type inertial fusion systems, the lifetime of the hot plasma in MICF is dictated by the shock speed in the shell, rather than by the sound speed in the plasma; as a result, it is about two orders of magnitude longer. This translates into a significantly higher Q (ratio of fusion energy to input energy) values at modest input laser energies, which in turn means it can serve as an effective source of high energy neutrons.