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Self-Organised Criticality: Difference between revisions
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Self-Organised Criticality (view source)
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This situation can only occur in systems that are ''not in equilibrium'', in which fluctuations provide a mechanism for regulating the system and keeping it close to criticality. | This situation can only occur in systems that are ''not in equilibrium'', in which fluctuations provide a mechanism for regulating the system and keeping it close to criticality. | ||
In magnetically confined plasmas, this state is thought to be responsible for the global transport phenomena of profile consistency, the Bohm scaling of confinement (in L-mode) | In magnetically confined plasmas, this state is thought to be responsible for the global transport phenomena of profile consistency, the [[Scaling law|Bohm scaling]] of confinement (in L-mode) | ||
<ref>[http://dx.doi.org/10.1109/27.650902 B.A. Carreras, IEEE Trans. Plasma Science '''25''', 1281 (1997)]</ref>, and | <ref>[http://dx.doi.org/10.1109/27.650902 B.A. Carreras, IEEE Trans. Plasma Science '''25''', 1281 (1997)]</ref>, and power degradation. [[Profile consistency]] is the observation that profiles tend to have roughly the same shape, regardless of the power and location of the applied heating. | ||
<ref>[http://dx.doi.org/10.1088/0741-3335/43/12A/325 F. Ryter et al., Plasma Phys. Control. Fusion '''43''', A323 (2001)]</ref> | <ref>[http://dx.doi.org/10.1088/0741-3335/43/12A/325 F. Ryter et al., Plasma Phys. Control. Fusion '''43''', A323 (2001)]</ref> | ||
Power degradation shows up in global transport [[Scaling law|scaling laws]], and implies a sub-linear scaling of the plasma energy content with the injected power. | Power degradation shows up in global transport [[Scaling law|scaling laws]], and implies a sub-linear scaling of the plasma energy content with the injected power. | ||