We present estimates of the turbulent energy-cascade rate derived from a Hall-magnetohydrodynamic (MHD) third-order law. We compute the contribution from the Hall term and the MHD term to the energy flux. Magnetospheric Multiscale (MMS) data accumulated in the magnetosheath and the solar wind are compared with previously established simulation results. Consistent with the simulations, we find that at large (MHD) scales, the MMS observations exhibit a clear inertial range dominated by the MHD flux. In the subion range, the cascade continues at a diminished level via the Hall term, and the change becomes more pronounced as the plasma beta increases. Additionally, the MHD contribution to interscale energy transfer remains important at smaller scales than previously thought. Possible reasons are offered for this unanticipated result.
In Situ Observation of Hall Magnetohydrodynamic Cascade in Space Plasma
Bandyopadhyay, Riddhi; Sorriso-Valvo, Luca; Chasapis, Alexandros; Hellinger, Petr; Matthaeus, William H.; Verdini, Andrea; Landi, Simone; Franci, Luca; Matteini, Lorenzo; Giles, Barbara L.; Gershman, Daniel J.; Moore, Thomas E.; Pollock, Craig J.; Russell, Christopher T.; Strangeway, Robert J.; Torbert, Roy B.; Burch, James L.
Journal:
Physical review letters (Print) 124 (22),
pp. 225101-1 - 225001-7
Year:
2020
ISTP Authors: Luca Sorriso-Valvo
Keywords: plasmas, Turbulence, magnetosheath
Research Activitie: JOURNAL ARTICLES
Related products
-
Astronomy & astrophysics (Print) 653 pp. A156-1 - A156-16 Year: 2021 DOI: 10.1051/0004-6361/202140279
Bridging hybrid- and full-kinetic models with Landau-fluid electrons I. 2D magnetic reconnection
Finelli F.; Cerri S.S.; Califano F.; Pucci F.; Laveder D.; Lapenta G.; Passot T.
-
Journal of plasma physics (Print) 87 (1), pp. 825870101-1 - 825870101-20 Year: 2021 DOI: 10.1017/S0022377820001567
Local and global properties of energy transfer in models of plasma turbulence
Vasconez, Christian L.; Perrone, D.; Marino, R.; Laveder, D.; Valentini, F.; Servidio, S.; Mininni, P.; Sorriso-Valvo, L.
-
Review of scientific instruments 92 (4), pp. 043556-1 - 043556-6 Year: 2021 DOI: 10.1063/5.0043669
Design of JT-60SA core Thomson scattering diagnostic system
Tojo H.; Pasqualotto R.; Fassina A.; Giudicotti L.; Sasao H.; Homma H.; Oyama N.
English
Italiano