Influence of a magnetic field on the light-induced ion drift

JETP Letters ◽  
2001 ◽  
Vol 74 (3) ◽  
pp. 154-158
Author(s):  
A. I. Parkhomenko
Keyword(s):  
Magnetic Field ◽  
Ion Drift

scholarly journals Current sheet flapping in the near-Earth magnetotail: peculiarities of propagation and parallel currents

2016 ◽  
Vol 34 (9) ◽  
pp. 739-750 ◽  
Author(s):  
Egor V. Yushkov ◽  
Anton V. Artemyev ◽  
Anatoly A. Petrukovich ◽  
Rumi Nakamura
Keyword(s):  
Magnetic Field ◽  
Current Sheet ◽  
Significant Variation ◽  
Current System ◽  
Wave Direction ◽  
Current Sheets ◽  
Ion Drift ◽  
Global Properties ◽  
Current Filaments ◽  
Parallel Current

Abstract. We consider series of tilted current sheet crossings, corresponding to flapping waves in the near-Earth magnetotail. We analyse Cluster observations from 2005 to 2009, when spacecraft visited the magnetotail neutral plane near X ∈ [ − 17,  − 8], Y ∈ [ − 16,  − 2] RE (in the GSM system). Large separation of spacecraft allows us to estimate both local and global properties of flapping current sheets. We find significant variation in flapping wave direction of propagation between the middle tail and flanks. Th series of tilted current sheets represent the system of periodic, almost parallel currents with typical thickness of current filaments about L = 0.4 RE. The earthward gradients of Bz magnetic field are reduced within this current system in comparison with the gradients in the quiet near-Earth magnetotail. The wavelength (i.e. a distance between two crossings of current sheets with the same orientations) of the flapping waves is larger than 2πL for most of observations. The velocity of flapping wave propagation is about ion bulk velocity and is significantly lower than the velocity of ion drift relative to electrons. We discuss possible drivers of flapping and estimate the amplitude of the total parallel current generated by flapping waves.

Some observations of ionospheric ion drift motions at Fort Churchill

1980 ◽  
Vol 58 (11) ◽  
pp. 1625-1634
Author(s):  
W. S.C. Brooks ◽  
J. A. Koehler
Keyword(s):  
Magnetic Field ◽  
Magnetic Activity ◽  
Magnetic Disturbance ◽  
Motion Detector ◽  
Sounding Rockets ◽  
Ion Motion ◽  
Ion Drift ◽  
Ground Magnetic ◽  
The Magnetic Field

A "ram-sensor" ion motion detector was flown on four sounding rockets from Fort Churchill. For two flights, during which a magnetic disturbance was observed on the ground, large horizontal ion motions were observed along with some turbulence. The remaining two flights were at times of little ground magnetic activity and the ion motions tended to be more aligned with the magnetic field.

scholarly journals Impurity effects on ion-drift-wave eigenmodes in a sheared magnetic field

1980 ◽  
Vol 23 (1) ◽  
pp. 167 ◽  
Author(s):  
W. M. Tang ◽  
R. B. White ◽  
P. N. Guzdar
Keyword(s):  
Magnetic Field ◽  
Impurity Effects ◽  
Ion Drift ◽  
Drift Wave

On ion-dust streaming instability in a collisional magnetized plasma with warm dust

2010 ◽  
Vol 77 (2) ◽  
pp. 265-270 ◽  
Author(s):  
M. ROSENBERG
Keyword(s):  
Magnetic Field ◽  
Dusty Plasma ◽  
Magnetized Plasma ◽  
Ion Drift ◽  
Drift Speed ◽  
Streaming Instability ◽  
Experimental Parameters ◽  
The Magnetic Field ◽  
Thermal Speed

AbstractThis brief communication discusses theoretically a resistive ion-dust streaming instability in a collisional dusty plasma, where the ions and electrons are magnetized, and the dust is unmagnetized. The instability is driven by ions streaming along the magnetic field. The emphasis is on the case where the dust has large thermal speed, and where the ion drift speed is ≲ the ion thermal speed. Application to possible laboratory experimental parameters is considered.

Vortices of ion-drift and related waves

1987 ◽  
Vol 38 (3) ◽  
pp. 407-425 ◽  
Author(s):  
V. P. Lakhin ◽  
S. V. Makurin ◽  
A. B. Mikhailovskii ◽  
O. G. Onishchenko
Keyword(s):  
Magnetic Field ◽  
Spatial Scales ◽  
Alfven Waves ◽  
Larmor Radius ◽  
Alfvén Waves ◽  
Plasma Rotation ◽  
Ion Drift

The problem of vortices of ion-drift and related flute-drift, balloon-drift and drift-Alfvén waves is analysed, taking into account the finiteness of the Larmor radius of the ions. It is shown that the structure of the stationary ion-drift vortices is similar to that of the Alfvén waves. It is found that the stationary ion-drift vortices in a plasma confined in a curvilinear magnetic field are characterized, generally speaking, by two different spatial scales. The role of plasma rotation in the vortex problem is investigated.

scholarly journals Relation of zonal plasma drift and wind in the equatorial F region as derived from CHAMP observations

2013 ◽  
Vol 31 (6) ◽  
pp. 1035-1044 ◽  
Author(s):  
J. Park ◽  
H. Lühr
Keyword(s):  
Magnetic Field ◽  
Ionospheric Plasma ◽  
Wind Effect ◽  
Field Observations ◽  
Republic Of China ◽  
Ion Drift ◽  
Plasma Drift ◽  
F Region ◽  
The Republic ◽  
Westward Drift

Abstract. In this paper we estimate zonal plasma drift in the equatorial ionospheric F region without counting on ion drift meters. From June 2001 to June 2004 zonal plasma drift velocity is estimated from electron, neutral, and magnetic field observations of Challenging Mini-satellite Payload (CHAMP) in the 09:00–20:00 LT sector. The estimated velocities are validated against ion drift measurements by the Republic of China Satellite-1/Ionospheric Plasma and Electrodynamics Instrument (ROCSAT-1/IPEI) during the same period. The correlation between the CHAMP (altitude ~ 400 km) estimates and ROCSAT-1 (altitude ~ 600 km) observations is reasonably high (R ≈ 0.8). The slope of the linear regression is close to unity. However, the maximum westward drift and the westward-to-eastward reversal occur earlier for CHAMP estimates than for ROCSAT-1 measurements. In the equatorial F region both zonal wind and plasma drift have the same direction. Both generate vertical currents but with opposite signs. The wind effect (F region wind dynamo) is generally larger in magnitude than the plasma drift effect (Pedersen current generated by vertical E field), thus determining the direction of the F region vertical current.

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