Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 2 of 2
Full-Text Articles in Physical Sciences and Mathematics
On The Origin Of Fluctuations In The Cusp Diamagnetic Cavity, K. Nykyri, A. Otto, E. Adamson, A. Tjulin
On The Origin Of Fluctuations In The Cusp Diamagnetic Cavity, K. Nykyri, A. Otto, E. Adamson, A. Tjulin
Publications
We have analyzed Cluster magnetic field and plasma data during high‐altitude cusp crossing on 14 February 2003. Cluster encountered a diamagnetic cavity (DMC) during northward interplanetary magnetic field (IMF) conditions, and as IMF rotated southward, the spacecraft reencountered the cavity more at the sunward side. The DMC is characterized by a high level of magnetic field fluctuations and high‐energy electrons and protons. Ultralow‐frequency turbulence has been suggested as a mechanism to accelerate particles in DMC. We demonstrate in this paper for the first time that many of the low‐frequency fluctuations in the cavity are back and forth motion of the …
Cluster Observations Of A Cusp Diamagnetic Cavity: Structure, Size, And Dynamics, K. Nykyri, A. Otto, E. Adamson, E. Dougal, J. Mumme
Cluster Observations Of A Cusp Diamagnetic Cavity: Structure, Size, And Dynamics, K. Nykyri, A. Otto, E. Adamson, E. Dougal, J. Mumme
Publications
We have analyzed Cluster magnetic field and plasma data during high‐altitude cusp crossing and compared them with high‐resolution MHD simulations. Cluster encountered a diamagnetic cavity (DMC) during northward interplanetary magnetic field (IMF) conditions, and as the IMF rotated southward, the spacecraft reencountered the cavity more at the sunward side of the cusp because the reconnection site had changed location. We found evidence of magnetic reconnection both during northward and southward IMF conditions. The Cluster separation was ∼5000 km, enabling for the first time measurements both inside the DMC and surrounding boundaries that allowed us to construct the structure of the …