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Internal Transport Barrier: Difference between revisions
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No generally accepted definition for Internal Transport Barriers (ITBs) exists. Vaguely speaking, a radially localized reduction of transport is meant. | No generally accepted definition for Internal Transport Barriers (ITBs) exists. Vaguely speaking, a radially localized reduction of transport is meant. | ||
Factors contributing to the creation of | |||
== Physical mechanism == | |||
The mechanism for the formation of Internal Transport Barriers in magnetically confined plasmas is complex and not fully understood. Probably, it is related to the mechanism for the formation of the [[H-mode]] barrier, involving turbulence suppression by sheared flows, possibly associated with rational magnetic surfaces. | |||
Factors contributing to the creation of ITBs include: | |||
<ref>[http://dx.doi.org/10.1088/0029-5515/44/4/R01 J.W. Connor et al, ''A review of internal transport barrier physics for steady-state operation of tokamaks'', Nucl. Fusion '''44''' (2004) R1-R49]</ref> | <ref>[http://dx.doi.org/10.1088/0029-5515/44/4/R01 J.W. Connor et al, ''A review of internal transport barrier physics for steady-state operation of tokamaks'', Nucl. Fusion '''44''' (2004) R1-R49]</ref> | ||
* Power deposited inside the magnetic surface, and/or pressure gradients | * Power deposited inside the magnetic surface, and/or pressure gradients | ||
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* MHD activity | * MHD activity | ||
* Momentum torques | * Momentum torques | ||
== References == | == References == | ||
<references /> | <references /> | ||