SM13C-2517
Characteristics of Reflected Ion Beam in Young HFAs
Characteristics of Reflected Ion Beam in Young HFAs
Monday, 14 December 2015
Poster Hall (Moscone South)
Abstract:
We analyze reflected ion beams in the vicinity and within young Hot Flow Anomalies at the bow shock observed onboard the CLUSTER spacecraft. Four HFAs were selected based on theOne of interesting features present in observed crossings of HFAs is that reflected ions tend to be observed within long time interval from the side of quasi-parallel shock. The flux of these ions is increasing and their average energy is decreasing towards the HFA itself. These cases correspond to larger ratio of the reflected beam density to the solar wind beam density.
Deceleration of the flow within HFA itself is reversely proportional to the reflected beam density, which corresponds to momentum conservation of the flux within HFA.