scholarly journals Large Alfvén wave power in the plasma sheet boundary layer during the expansion phase of substorms

2000 ◽  
Vol 27 (19) ◽  
pp. 3169-3172 ◽  
Author(s):  
A. Keiling ◽  
J. R. Wygant ◽  
C. Cattell ◽  
M. Temerin ◽  
F. S. Mozer ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Alfven Wave ◽  
Wave Power ◽  
Plasma Sheet Boundary Layer ◽  
Expansion Phase

Resonant Alfvén wave heating of the plasma sheet boundary layer

1990 ◽  
Vol 95 (A9) ◽  
pp. 15039 ◽  
Author(s):  
B. G. Harrold ◽  
C. K. Goertz ◽  
R. A. Smith ◽  
P. J. Hansen
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Alfven Wave ◽  
Plasma Sheet Boundary Layer ◽  
Wave Heating

scholarly journals Cluster magnetotail observations of a tailward-travelling plasmoid at substorm expansion phase onset and field aligned currents in the plasma sheet boundary layer

2005 ◽  
Vol 23 (12) ◽  
pp. 3667-3683 ◽  
Author(s):  
N. C. Draper ◽  
M. Lester ◽  
S. W. H. Cowley ◽  
J.A. Wild ◽  
S. E. Milan ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Neutral Line ◽  
Current System ◽  
Onset Time ◽  
Plasma Sheet Boundary Layer ◽  
Expansion Phase ◽  
Magnetometer Data ◽  
Reconnection Site ◽  
Substorm Onsets

Abstract. We present data from both ground- and space-based instruments for a substorm event which occurred on 5 October 2002, with an expansion phase onset time of 02:50 UT determined from the ground magnetometer data. During this substorm, the Cluster spacecraft were located around 15 RE downtail, 8 RE from midnight in the pre-midnight sector and just 2 RE above the equatorial plane (in GSM coordinates). At expansion phase onset the Cluster spacecraft were located in the plasma sheet, tailward of a near-Earth neutral line and detected a significant time delay of 6 min between the tail field Bz component becoming negative and the subsequent detection of Earthward flows. This is explained by the formation of a tailward-directed travelling compression region initially Earthward of the spacecraft; 7 min later the Cluster spacecraft entered the plasma sheet boundary layer; they remained in and close to the plasma sheet boundary layer for around 15 min before exiting to the lobe. The spacecraft then re-entered the plasma sheet 30 min after onset. Earthward then tailward directed currents detected in the plasma sheet boundary layer after onset indicate that the Cluster spacecraft encountered the dawnward and duskward portions of the reconnection flow associated current system with Region 1 sense, respectively. The reconnection site and current system were initially skewed towards the pre-midnight sector, consistent with previous observations that found the majority of substorm onsets located in this sector. At later times the reconnection site and current system had moved towards dawn, to be located more centrally in the midnight sector.

scholarly journals Shear-driven kinetic Alfven wave in the plasma sheet boundary layer

2008 ◽  
Vol 60 (3) ◽  
pp. 191-205 ◽  
Author(s):  
B. V. Tiwari ◽  
R. Mishra ◽  
P. Varma ◽  
M. S. Tiwari
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Alfven Wave ◽  
Plasma Sheet Boundary Layer ◽  
Kinetic Alfvén Wave ◽  
Kinetic Alfven Wave

Plasma Sheet Boundary Layer in Jupiter's Magnetodisk as Observed by Juno

2020 ◽  
Vol 125 (8) ◽  
Author(s):  
X.‐J. Zhang ◽  
Q. Ma ◽  
A. V. Artemyev ◽  
W. Li ◽  
W. S. Kurth ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Plasma Sheet Boundary Layer

scholarly journals Dispersive O<sup>+</sup> conics observed in the plasma-sheet boundary layer with CRRES/LOMICS during a magnetic storm

1996 ◽  
Vol 14 (6) ◽  
pp. 593-607
Author(s):  
M. Wüest ◽  
D. T. Young ◽  
M. F. Thomsen ◽  
B. L. Barraclough ◽  
H. J. Singer ◽  
...  
Keyword(s):  
Boundary Layer ◽  
Plasma Sheet ◽  
Pitch Angle ◽  
Radiation Effects ◽  
Low Frequency ◽  
Particle Interactions ◽  
Plasma Sheet Boundary Layer ◽  
Angle Scattering ◽  
Central Plasma ◽  
Spacecraft Spin

Abstract. We present initial results from the Low-energy magnetospheric ion composition sensor (LOMICS) on the Combined release and radiation effects satellite (CRRES) together with electron, magnetic field, and electric field wave data. LOMICS measures all important magnetospheric ion species (H+, He++, He+, O++, O+) simultaneously in the energy range 60 eV to 45 keV, as well as their pitch-angle distributions, within the time resolution afforded by the spacecraft spin period of 30 s. During the geomagnetic storm of 9 July 1991, over a period of 42 min (0734 UT to 0816 UT) the LOMICS ion mass spectrometer observed an apparent O+ conic flowing away from the southern hemisphere with a bulk velocity that decreased exponentially with time from 300 km/s to 50 km/s, while its temperature also decreased exponentially from 700 to 5 eV. At the onset of the O+ conic, intense low-frequency electromagnetic wave activity and strong pitch-angle scattering were also observed. At the time of the observations the CRRES spacecraft was inbound at L~7.5 near dusk, magnetic local time (MLT), and at a magnetic latitude of –23°. Our analysis using several CRRES instruments suggests that the spacecraft was skimming along the plasma sheet boundary layer (PSBL) when the upward-flowing ion conic arrived. The conic appears to have evolved in time, both slowing and cooling, due to wave-particle interactions. We are unable to conclude whether the conic was causally associated with spatial structures of the PSBL or the central plasma sheet.

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