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Anomalous transport: Difference between revisions
→Can anomalous transport be controlled?
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<ref>L.C. Woods, ''Theory of tokamak transport: new aspects for nuclear fusion reactor design'', John Wiley and Sons (2006) ISBN 3527406255</ref> | <ref>L.C. Woods, ''Theory of tokamak transport: new aspects for nuclear fusion reactor design'', John Wiley and Sons (2006) ISBN 3527406255</ref> | ||
However, this argument fails to note that transport events may be collective (e.g., via ''streamers''), which do not require an enhanced collisionality. | However, this argument fails to note that transport events may be collective (e.g., via ''streamers''), which do not require an enhanced collisionality. | ||
== Can anomalous transport be modelled? == | |||
There are several answers to this question. Since all equations describing the motion of charged particles in fields are known, and the effects of collisions can be modelled with fair confidence, detailed numerical (gyrokinetic) simulations are possible. | |||
However, due to the enormous disparity between the minimum and maximum scales involved (collision times vs. transport times, and the gyroradius vs. the machine size), the required computer resources are huge. An alternative approach is to model the net effect of turbulence somehow (see [[Non-diffusive transport]]). | |||
<ref>[http://dx.doi.org/10.1016/S0370-1573(02)00331-9 G. M. Zaslavsky, ''Chaos, fractional kinetics, and anomalous transport'', Physics Reports '''371''', Issue 6 (2002) 461-580]</ref> | |||
== Can anomalous transport be controlled? == | == Can anomalous transport be controlled? == | ||