Scaling law: Difference between revisions

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<ref>[http://dx.doi.org/10.1088/0029-5515/47/9/025 A. Dinklage et al, ''Physical model assessment of the energy confinement time scaling in stellarators'', Nuclear Fusion '''47''', 9 (2007) 1265-1273]</ref>
<ref>[http://dx.doi.org/10.1088/0029-5515/47/9/025 A. Dinklage et al, ''Physical model assessment of the energy confinement time scaling in stellarators'', Nuclear Fusion '''47''', 9 (2007) 1265-1273]</ref>


== Power degradation ==
=== Power degradation ===


One of the remarkable and initially unexpected properties of magnetically confined plasmas is the reduction of the [[Energy confinement time|energy confinement time]] &tau;<sub>E</sub> as the heating power ''P'' is increased. Typically:
One of the remarkable and initially unexpected properties of magnetically confined plasmas is the reduction of the [[Energy confinement time|energy confinement time]] &tau;<sub>E</sub> as the heating power ''P'' is increased. Typically:
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This phenomenon is therefore a form of plasma [[Self-Organised Criticality|self-organisation]].
This phenomenon is therefore a form of plasma [[Self-Organised Criticality|self-organisation]].


== Size scaling ==
=== Size scaling ===


The L-mode scaling is of the "Bohm" type, while the ELMy H-mode is of the "gyro-Bohm" type.
The L-mode scaling is of the "Bohm" type, while the ELMy H-mode is of the "gyro-Bohm" type.