SM41F-2559
Observations of Multi-band Structures in Double Star TC-1 PEACE Electron and HIA Ion Data
Thursday, 17 December 2015
Poster Hall (Moscone South)
Kirthika Mohan Narasimhan1, Andrew Neil Fazakerley2, Sandrine Grimald3, Iannis S Dandouras4, Branislav Mihaljcic1, Lynn M Kistler5 and Christopher John Owen6, (1)Mullard Space Science Laboratory, Dorking, United Kingdom, (2)University College London, London, United Kingdom, (3)ONERA Toulouse, Toulouse Cedex 04, France, (4)IRAP, Toulouse, France, (5)University of New Hampshire Main Campus, Durham, NH, United States, (6)University College London, Mullard Space Science Laboratory, London, United Kingdom
Abstract:
Several authors have reported inner magnetosphere observations of proton distributions confined to narrow energy bands in the range 1 - 25 keV (Smith and Hoffman (1974), etc). These structures have been described as "nose structures", with reference to their appearance in energy-time spectrograms and are also known as "bands" if they occur for extended periods of time. Multi-nose structures have been observed if 2 or more noses appear at the same time (Vallat et al., 2007). Gaps between "noses" (or "bands") have been explained in terms of the competing corotation, convection and magnetic gradient drifts. Charge exchange losses in slow drift paths for steady state scenarios and the role of substorm injections have also been considered (Li et al., 2000; Ebihara et al., 2004). We analyse observations of electron and ion multi-band structures frequently seen in Double-Star TC1 PEACE and HIA data. We present results from statistical surveys conducted using data from the duration of the mission. Furthermore, using a combination of both statistics and simulations, we test previous theories as to possible formation mechanisms and explore other possible explanations.
