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Beta: Difference between revisions
Removed the reference to the Greenwald limit. The operational parameter used to indicate how close the plasma is to the Greenwald limit is the Greenwald fraction (n/n_G). See Martin Greenwald 2002 Plasma Phys. Control. Fusion 44 R27
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Andrew.maris (talk | contribs) (Removed the reference to the Greenwald limit. The operational parameter used to indicate how close the plasma is to the Greenwald limit is the Greenwald fraction (n/n_G). See Martin Greenwald 2002 Plasma Phys. Control. Fusion 44 R27) |
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== Normalized beta, beta limit == | == Normalized beta, beta limit == | ||
[[File:Troyon limit.png|200px|thumb|Troyon Limit<ref>ITER Physics Expert Group on Disruptions, Plasma Control, and MHD, ''ITER Physics Basis Chapter 3: MHD stability, operational limits and disruptions'', [[doi:10.1088/0029-5515/39/12/303|Nucl. Fusion '''39 ''' (1999) 2251-2389]]</ref>]] | [[File:Troyon limit.png|200px|thumb|Troyon Limit<ref>ITER Physics Expert Group on Disruptions, Plasma Control, and MHD, ''ITER Physics Basis Chapter 3: MHD stability, operational limits and disruptions'', [[doi:10.1088/0029-5515/39/12/303|Nucl. Fusion '''39 ''' (1999) 2251-2389]]</ref>]] | ||
<math>\beta</math> is often expressed in terms of the normalized beta (or Troyon factor)<ref>F. Troyon, R. Gruber, H. Saurenmann, S. Semenzato and S. Succi, ''MHD-Limits to Plasma Confinement'', [[doi:10.1088/0741-3335/26/1A/319|Plasma Phys. Control. Fusion '''26''' (1984) 209]]</ref>, an operational parameter indicating how close the plasma is to reaching | <math>\beta</math> is often expressed in terms of the normalized beta (or Troyon factor)<ref>F. Troyon, R. Gruber, H. Saurenmann, S. Semenzato and S. Succi, ''MHD-Limits to Plasma Confinement'', [[doi:10.1088/0741-3335/26/1A/319|Plasma Phys. Control. Fusion '''26''' (1984) 209]]</ref>, an operational parameter indicating how close the plasma is to reaching destabilising major MHD activity. Its definition is (for tokamaks): | ||
<ref>K. Miyamoto, ''Plasma Physics and Controlled Nuclear Fusion'', Springer-Verlag (2005) {{ISBN|3540242171}}</ref> | <ref>K. Miyamoto, ''Plasma Physics and Controlled Nuclear Fusion'', Springer-Verlag (2005) {{ISBN|3540242171}}</ref> | ||