Small scale alfvénic structure in the aurora
WebThe simulations show parallel electromagnetic fields consistent with the theory, and they show that the particle acceleration results in plasma cavities and, if the waves amplitudes are high enough, in ion beams. These acceleration processes could be relevant in … WebJan 5, 2000 · The small-scale KAWs can be excited by the surface wave mode conversion on the magnetospheric boundary layer with large density and magnetic field gradient, such …
Small scale alfvénic structure in the aurora
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WebJul 23, 2009 · Some recent observations of solar corona suggest that the kinetic Alfvén waves (KAWs) turbulence may be responsible for electron acceleration in solar corona and coronal heating. In the present research, we investigate the turbulent spectra of KAW due to filamentation process in the presence of Landau damping and particle energization. WebSep 27, 2005 · Since the aurora has a very similar appearance from the two sites, its altitude extent must be rather small. Knowledge of the altitude of the emissions allows us to estimate the scale sizes of the curls, which are about 1–5 km, with the arc thickness of ≈1 km. Figure 2 Open in figure viewer PowerPoint
WebThis paper presents a comprehensive review of dispersive Alfvén waves in space and laboratory plasmas. We start with linear properties of Alfvén waves and show how the inclusion of ion gyroradius, parallel electron inertia, and finite frequency effects modify … We would like to show you a description here but the site won’t allow us. WebA is the Alfvenic time. According to calcula-tions of Lessard and Knudsen (2001), Alfven waves with spatial scales less than a few km are strongly diffused and damped upon the reflection from the realistic ionosphere. There-fore, a possible occurrence in the IAR of small-scale Alfvenic structures with the transverse
WebJul 15, 2012 · Scaling index α derived from the slope of logarithmic diagrams (LD) constructed by the discrete wavelet transform of data can be estimated as α = 2.2 ± 0.3, which is close to α estimate earlier reported for scales 1–30 km by electric field observations of the Dynamics Explorer 2 satellite. WebSmall-scale length density cavities have been observed in the auroral zone by Viking and Freja spacecrafts [ 35, 36 ]. For the auroral region, we observed the density fluctuations of ∼0.12 n0, consistent with the FAST observation reported by Chaston et al. [ 14, 15 ].
WebDec 12, 2009 · Small-scale structures last less than 10 s and gradually become larger structures. [19] These structures and the time variations observed for brightening auroras …
WebApr 13, 2024 · Stasiewicz, K., Bellan, P., Chaston, C., et al., Small scale Alfvénic structure in the aurora, Space Sci. Rev., 2000, vol. 92, pp. 423–533. Article Google Scholar Tam, S.W.Y., Chang, T., Kintner, P.M., and Klatt, E., Intermittency analyses on the SIERRA measurements of the electric field fluctuations in the auroral zone, Geophys. Res. cullumber has the following inventory data:WebThis paper presents a comprehensive review of dispersive Alfvén waves in space and laboratory plasmas. We start with linear properties of Alfvén waves and show how the … cullumber company sell three differentWebThis paper presents a comprehensive review of dispersive Alfvén waves in space and laboratory plasmas. We start with linear properties of Alfvén waves and show how the … east ham to paddingtonWeb(1) In this paper we investigate how the parameters of the ionosphere and the low-altitude magnetosphere mediate the formation and spatiotemporal properties of small-scale, intense electromagnetic structures commonly observed by low-altitude satellites in the auroral and subauroral magnetosphere. The study is based on numerical modeling of a time-evolving, … east ham to purfleetWebFeb 1, 2024 · As will be described below, rapid advancements in camera technology in the past two to three decades have led to extensive observations of small-scale and dynamic … cullum centres schoolsWebMay 7, 2010 · Spatio-temporal evolution of thin Alfven resonance layer - Volume 76 Issue 5 east ham to tadworthWebThis paper presents a comprehensive review of dispersive Alfven waves in space and laboratory plasmas. We start with linear properties of Alfven waves and show how the … east ham war memorial