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Anomalous transport: Difference between revisions
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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 anomalous transport may consist of collective events (e.g., ''streamers''), which does not require an enhanced collisionality. | However, this argument fails to note that anomalous transport may consist of collective events (e.g., ''streamers''), which does not require an enhanced collisionality. | ||
As a | As a side remark, this argument does show that the contribution of turbulence to transport is likely ''not'' of the diffusive type (see [[Non-diffusive transport]]). | ||
== Physical mechanism == | |||
The physical mechanism behind anomalous transport has not been fully clarified. | |||
However, it is generally assumed that anomalous transport is the consequence of microscopic instabilities. | |||
The plasma potentially produces a plethora of such instabilities. | |||
The most likely candidates involved in generating the observed anomalous transport are: | |||
* Ion Temperature Gradient (ITG) instabilities | |||
* Electron Temperature Gradient (ETG) instabilities | |||
* Drift Trapped Electron Modes (DTEM) | |||
''(to be completed; references needed)'' | |||
== Can anomalous transport be modelled? == | == Can anomalous transport be modelled? == | ||