Axisymmetric Magnetic Mirror Fusion-Fission Hybrid
Early application of the simple axisymmetric mirror, requiring intermediate performance between a neutron source for materials testing Q=P fusion /P input ~0.05 and pure fusion Q>10, are the hybrid applications. The Axisymmetric Mirror has attractive features as a driver for a fusion-fission hybr...
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Published in | Fusion science and technology Vol. 61; no. 1T; pp. 206 - 215 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Taylor & Francis
01.01.2012
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Online Access | Get full text |
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Summary: | Early application of the simple axisymmetric mirror, requiring intermediate performance between a neutron source for materials testing Q=P
fusion
/P
input
~0.05 and pure fusion Q>10, are the hybrid applications. The Axisymmetric Mirror has attractive features as a driver for a fusion-fission hybrid system: geometrical simplicity, as well as the typical mirror features of inherently steady-state operation, and natural divertors in the form of end tanks. This level of physics performance has the virtue of being low risk with only modest R&D needed; and its simplicity promises economy advantages. Operation at Q~1 allows for relatively low electron temperatures, in the range of 3 keV, for the DT injection energy ~ 80 keV from existing positive ion neutral beams designed for steady state. A simple mirror with the plasma diameter of 1 m and mirror-to-mirror length of 40 m is discussed. Simple circular steady state superconducting coils are based on 15 T technology development of the ITER central solenoid. Three groups of physics issues are presented: axial heat loss, MHD stability, and microstability of sloshing ions.
Burning fission reactor wastes by fissioning transuranics in the hybrid will multiply fusion's neutron energy by a factor of ~10 or more and diminish the Q needed to overcome the cost of recirculating power for good economics to less than 2 and for minor actinides with multiplication over 50 to Q~0.2. Hybrids that obtain revenues from sale of both electricity and production of fissile fuel with fissioning blankets might need Q<2 while suppressing fissioning might be the most economical application of fusion but will require Q>4. |
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ISSN: | 1536-1055 1943-7641 |
DOI: | 10.13182/FST12-A13421 |