Search Publications
Deformation of plasma bubbles and the associated field aligned current system during substorm recovery phase
Deng, X. H.; Huang, S. Y.; Zhou, M. +2 more
Multiple plasma bubbles have been detected by CLUSTER satellites on August 15th 2001 in midtail (∼-18 Re). Those bubbles can be classified into two types. Type-I bubbles are similar to those bubbles in previous studies [ Sergeev et al., 1996; Walsh et al., 2009]. Unlike type-I bubbles, the trailing parts/tails of type-II bubbles are much more dyna…
Polarization and direction of arrival of Jovian quasiperiodic bursts observed by Cassini
Cecconi, B.; Kimura, T.; Misawa, H. +4 more
Jovian quasiperiodic (QP) radio bursts are suspected to be associated with relativistic particle accelerations occurring with a quasiperiodicity between a few minutes and a few tens of minutes in Jupiter's polar magnetosphere. Understanding the excitation and propagation of QP bursts could help us to better understand this periodic energization pr…
Experimental evaluation of common spacecraft data analysis techniques for reconnection region analysis in a laboratory plasma
Yoo, Jongsoo; Yamada, Masaaki
A laboratory plasma is utilized to assess the effectiveness of several prominent spacecraft data analysis techniques. These include minimum variance analysis on the magnetic field (MVAB) and various boundary-crossing time analyses (BCTA) such as the constant velocity approach (CVA), constant thickness approach (CTA), and minimum thickness variance…
Cluster observations of band-limited Pc 1 waves associated with streaming H+ and O+ ions in the high-altitude plasma mantle
Glassmeier, K. -H.; Lavraud, B.; Rème, H. +12 more
Bursts of band-limited Pc 1 waves (0.2 to ∼1.0 Hz) with normalized frequency f/fH+ ∼ 0.5 have been observed by the Cluster spacecraft during many passes through the high-latitude plasma mantle. These transverse, left-hand polarized waves are associated with regions of H+ and O+ ions streaming away from Earth along …
Entropy conservation and rate of propagation of bubbles in the Earth's magnetotail: A case study
Wing, Simon; Sanchez, Ennio R.; Spanswick, Emma +1 more
Earthward propagation of low-density flux tubes, called “plasma bubbles,” is a candidate mechanism to reduce total entropy in the plasma sheet. MHD models predict that bubbles conserve total entropy (S) as they propagate earthward, that the amount of density depletion governs the speed of propagation, and that bubbles slow down as their S nears th…
Vlasov simulation of electrostatic solitary structures in multi-component plasmas
Goldstein, Melvyn L.; Umeda, Takayuki; Pickett, Jolene S. +1 more
Electrostatic solitary structures have been observed in the Earth's magnetosheath by the Cluster spacecraft. Recent theoretical work has suggested that these solitary structures are modeled by electron acoustic solitary waves existing in a four-component plasma system consisting of core electrons, two counter-streaming electron beams, and one spec…
A two-fluid model of the bifurcated current sheet
Yoon, Peter H.; Janaki, M. S.; Dasgupta, Brahmananda
Recent satellite observations show that current sheets in the space plasma environment are often characterized by bifurcated structures. The majority of the available models of the bifurcated current sheet in the literature are based upon equilibrium Vlasov-Maxwell kinetic theory. While in principle, kinetic models are more fundamental, investigat…
Cassini observation of Jovian anomalous continuum radiation
Schippers, P.; Gurnett, D. A.; Hospodarsky, G. B. +4 more
Jovian anomalous continuum is a narrowband electromagnetic radiation near 10 kHz that can escape from Jupiter's magnetosphere to interplanetary space. One possible source mechanism is the magnetosheath re-radiation of the Jovian low frequency radio emissions such as the quasiperiodic (QP) radio emissions, broadband kilometric radiation (bKOM) and …
Substorm-like magnetospheric response to a discontinuity in the Bx component of interplanetary magnetic field
Carlson, C. W.; Angelopoulos, V.; Auster, H. -U. +4 more
We examined the magnetospheric magnetic field and plasma responses to an encounter of a discontinuity in the Bx component of interplanetary magnetic field (IMF). The striking variations of simultaneous solar wind dynamic pressure and IMF-Bz were not observed. Furthermore, we found that this IMF-Bx discontinuity was…
Effect of photo-dissociation on the spreading of OH and O clouds in Saturn's inner magnetosphere
Morioka, Akira; Tsuchiya, Fuminori; Misawa, Hiroaki +3 more
We examine the contribution of photo-dissociation under quiet solar conditions to the global OH and O distributions in Saturn's inner magnetosphere by performing a Monte Carlo simulation. We first calculate the H2O distribution generated by H2O sources, namely Enceladus' cryo-volcanic plumes, satellite sputtering, and E ring …