Ion beams in the plasma sheet boundary layer
نویسندگان
چکیده
منابع مشابه
Propagation of Alfvén Waves at the Plasma Sheet Boundary Layer
Recently, observations from the Polar and Cluster satellites have indicated that largeamplitude kinetic Alfvén waves are observed throughout the plasma sheet, particularly at the plasma sheet boundary layers, during substorms. These waves may be directly produced by reconnection processes in the tail, or indirectly through linear or nonlinear mode conversion or by localized plasma flows in the ...
متن کاملSome properties of Alfvén waves: Observations in the tail lobes and the plasma sheet boundary layer
[1] We report properties of substorm-related, globally excited Alfvén waves on a temporal scale of 6 to 300 s (3.3 to 167 mHz) at geocentric distances between 5 and 6 RE. The waves were observed in the tail lobes and the plasma sheet boundary layer (PSBL) by the Polar satellite. In each region we made the following observations: (1) The tail lobe Alfvén waves started at substorm onset as determ...
متن کاملTransient, small‐scale field‐aligned currents in the plasma sheet boundary layer during storm time substorms
We report on field-aligned current observations by the four Magnetospheric Multiscale (MMS) spacecraft near the plasma sheet boundary layer (PSBL) during two major substorms on 23 June 2015. Small-scale field-aligned currents were found embedded in fluctuating PSBL flux tubes near the separatrix region. We resolve, for the first time, short-lived earthward (downward) intense field-aligned curre...
متن کاملLatitude-energy structure of multiple ion beamlets in Polar/TIMAS data in plasma sheet boundary layer and boundary plasma sheet below 6 RE radial distance: basic properties and statistical analysis
Abstract. Velocity dispersed ion signatures (VDIS) occurring at the plasma sheet boundary layer (PSBL) are a well reported feature. Theory has, however, predicted the existence of multiple ion beamlets, similar to VDIS, in the boundary plasma sheet (BPS), i.e. at latitudes below the PSBL. In this study we show evidence for the multiple ion beamlets in Polar/TIMAS ion data and basic properties o...
متن کاملThe statistical studies of the inner boundary of plasma sheet
The penetration of plasma sheet ions into the inner magnetosphere is very important to the inner magnetospheric dynamics since plasma sheet ions are one of the major particle sources of ring current during storm times. However, the direct observations of the inner boundary of the plasma sheet are fairly rare due to the limited number of satellites in near equatorial orbits outside 6.6RE. In thi...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2015
ISSN: 2169-9380,2169-9402
DOI: 10.1002/2015ja021573