Anomalous momentum and energy transfer rates for electrostaticion-cyclotron turbulence in downward auroral-current regionsof the Earth's magnetosphere. III

• Published in: Physics of plasmas 2010-06, Vol.17 (6), p.062903-062903-19
• Main Authors: Jasperse, John R., Basu, Bamandas, Lund, Eric J., Grossbard, Neil
• Format: Article
• ISSN: 1070-664X; 1089-7674
• DOI: 10.1063/1.3443711

Recently, a new multimoment fluid theory was developed for inhomogeneous, nonuniformly magnetized plasma in the guiding-center and gyrotropic approximation that includes the effect of electrostatic, turbulent, wave-particle interactions (see Jasperse [ Phys. Plasmas 13 , 072903 ( 2006 ) ; Jasperse , Phys. Plasmas 13 , 112902 ( 2006 ) ]). In the present paper, which is intended as a sequel, it is concluded from FAST satellite data that the electrostatic ion-cyclotron turbulence that appears is due to the operation of an electron, bump-on-tail-driven ion-cyclotron instability for downward currents in the long-range potential region of the Earth's magnetosphere. Approximate closed-form expressions for the anomalous momentum and energy transfer rates for the ion-cyclotron turbulence are obtained. The turbulent, inhomogeneous, nonuniformly magnetized, multimoment fluid theory given above, in the limit of a turbulent, homogeneous, uniformly magnetized, quasisteady plasma, yields the well-known formula for the anomalous resistivity given by Gary and Paul [ Phys. Rev. Lett. 26 , 1097 ( 1971 )] and Tange and Ichimaru [ J. Phys. Soc. Jpn. 36 , 1437 ( 1974 )] .