scholarly journals Testing electric and magnetic field models of the storm-time inner magnetosphere

2000 ◽  
Vol 105 (A11) ◽  
pp. 25221-25231 ◽  
Author(s):  
Lynn M. Kistler ◽  
Douglas J. Larson
1994 ◽  
Vol 21 (16) ◽  
pp. 1739-1742 ◽  
Author(s):  
J. Wygant ◽  
F. Mozer ◽  
M. Temerin ◽  
J. Blake ◽  
N. Maynard ◽  
...  

2015 ◽  
Vol 33 (8) ◽  
pp. 955-964 ◽  
Author(s):  
G. I. Korotova ◽  
D. G. Sibeck ◽  
K. Tahakashi ◽  
L. Dai ◽  
H. E. Spence ◽  
...  

Abstract. We present Van Allen Probe B observations of azimuthally limited, antisymmetric, poloidal Pc 4 electric and magnetic field pulsations in the pre-midnight sector of the magnetosphere from 05:40 to 06:00 UT on 1 May 2013. Oscillation periods were similar for the magnetic and electric fields and proton fluxes. The flux of energetic protons exhibited an energy-dependent response to the pulsations. Energetic proton variations were anticorrelated at medium and low energies. Although we attribute the pulsations to a drift-bounce resonance, we demonstrate that the energy-dependent response of the ion fluxes results from pulsation-associated velocities sweeping energy-dependent radial ion flux gradients back and forth past the spacecraft.


2015 ◽  
Vol 81 (3) ◽  
Author(s):  
Sakineh Meshkani ◽  
Mahmood Ghoranneviss ◽  
Mansoureh Lafouti

For understanding the effect of resonant helical magnetic field (RHF) and bias on the edge plasma turbulent transport, the radial and poloidal electric field (Er, EP), poloidal and toroidal magnetic field (BP, Br) were detected by the Langmuir probe, magnetic probe and diamagnetic loop. The poloidal, toroidal and radial velocity (VP, Vr, Vt) can be determined from the electric and magnetic field. In the present work, we have investigated the effect of the magnitude of bias (Vbias = 200v, Vbias = 320v) on Er, EP, BP, Bt, VP, Vr, Vt. Moreover, we applied RHF with L = 2, L = 3 and L = 2 and 3 and investigate the effect of the helical windings radius on above parameters. Also, the experiment was repeated by applying the positive biasing potentials and RHF's simultaneously. The results show that by applying bias to the plasma at t = 15 msec at r/a = 0.9, Er, BP and Bt increase while EP decreases. The best modification occurs at Vbias = 200v. By applying RHF to the plasma, both the electric and magnetic field vary. Er reaches the highest in the presence of RHF with L = 3. The same results are obtained for BP, Bt, VP and Vt. While the inverse results are obtained for EP and Vr. Finally, RHF and bias are applied simultaneously to the plasma. With applied bias with Vbias = 200v and RHF with L = 2 and 3, we reach to the ideal circumstance. The same results obtain in the situation with Vbias = 320v and RHF with L = 2 and 3.


1993 ◽  
Vol 57 (2-3) ◽  
pp. 4997-5002 ◽  
Author(s):  
E. Punkka ◽  
M.F. Rubner ◽  
J.D. Hettinger ◽  
J.S. Brooks ◽  
S.T. Hannahs

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