[PEM19-04] Cold ions perpendicularly heated by fast magnetosonic waves in the inner magnetosphere observed by Arase (ERG) satellite
Keywords:ion heating, magnetosonic wave, WPIA
We have applied the WPIA (wave-particle interaction analysis) method to the selected ion heating event with the MS waves. The results show that the MS waves accelerate the ions with pitch angles near 90 degrees. Moreover, we found these ions give their energy to EMIC waves which appears just below the local proton cyclotron frequency. Since MS waves are considered to be generated by the ring distrbution of ions, this analysis indicates energy transfer from higher-energy ions to the cold ions in the inner magnetosphere.