Evidence of a Cascade and Dissipation of Solar-Wind Turbulence at the Electron Gyroscale

Details Evidence of a Cascade and Dissipation of Solar-Wind Turbulence at the Electron Gyroscale Evidence of a Cascade and Dissipation of Solar-Wind Turbulence at the Electron Gyroscale

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phrvl.102w1102s&link_type=abstract

Physical Review Letters, vol. 102, Issue 23, id. 231102

Physics

112

Particle Emission, Solar Wind, Plasma Turbulence, Turbulence, Magnetohydrodynamics And Plasmas

Scientific paper

We report the first direct determination of the dissipation range of magnetofluid turbulence in the solar wind at the electron scales. Combining high resolution magnetic and electric field data of the Cluster spacecraft, we computed the spectrum of turbulence and found two distinct breakpoints in the magnetic spectrum at 0.4 and 35 Hz, which correspond, respectively, to the Doppler-shifted proton and electron gyroscales, fρp and fρe. Below fρp, the spectrum follows a Kolmogorov scaling f-1.62, typical of spectra observed at 1 AU. Above fρp, a second inertial range is formed with a scaling f-2.3 down to fρe. Above fρe, the spectrum has a steeper power law ˜f-4.1 down to the noise level of the instrument. We interpret this as the dissipation range and show a remarkable agreement with theoretical predictions of a quasi-two-dimensional cascade into Kinetic Alfvén Waves (KAW).

Affiliated with

Also associated with

No associations

Rating

Evidence of a Cascade and Dissipation of Solar-Wind Turbulence at the Electron Gyroscale does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Evidence of a Cascade and Dissipation of Solar-Wind Turbulence at the Electron Gyroscale, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evidence of a Cascade and Dissipation of Solar-Wind Turbulence at the Electron Gyroscale will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1644660