Ion‐ion kink instability in the magnetotail: 1. Linear theory

Karimabadi, H.; Daughton, W.; Pritchett, P. L.; Krauss‐Varban, D.

doi:10.1029/2003ja010026

Cited by 74 publications

(96 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5b). This is a typical situation for various drift modes excited in the CS due to the relative motion (in the dawn-dusk direction) of charged particle flows (ions and electrons, or hot and background ions; see Daughton, 1999;Karimabadi et al, 2003a;Korovinskiy et al, 2015). Thus, a kink deformation of the neutral plane of flapping CSs can be induced by drift instabilities.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, kink modes of CS instability can explain flapping wave propagation but cannot describe the dominance of parallel currents with large V d (most models of kink waves consider zero or vanishing B z ; e.g. Daughton, 1999;Karimabadi et al, 2003a;Zelenyi et al, 2009). Finally, we come to the puzzling conclusion that all three different instabilities (double-gradient, ballooning/interchange, and kink) meet difficulties in the explanation of observed flapping waves.…”

Section: Discussionmentioning

confidence: 99%

“…4). Kink modes of CS instability (Daughton, 1999;Karimabadi et al, 2003a;Zelenyi et al, 2009) predict the flapping wave velocity about a drift velocity (due to strong diamagnetic drifts in the initial CS). Configuration of titled CSs assumes that current carrying particles (i.e.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

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

et al. 2016

View full text Add to dashboard Cite

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] R E (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 R E . The earthward gradients of B z 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 2π L 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.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2016

View full text Add to dashboard Cite

show abstract

“…It can be also considered as a generalization of some earlier models of thin CS (Eastwood, 1972;Kropotkin and Domrin, 1996). The ion component of TACS was found taking into account conservation of the quasiadiabatic invariant I z = v z dz.…”

Section: Models Of Current Sheetmentioning

confidence: 99%

“…Another unexpected feature was abundance of strongly tilted (in the YZ GSM plane) sheets with rather variable profiles (Sergeev et al, 2004;Petrukovich et al, 2006), which most likely represent nonstationary structures (Malova et al, 2007;Petrukovich et al, 2008;Zelenyi et al, 2009;Erkaev et al, 2009) and often cannot be explained by motion of the sheet as a whole. A variety of TCS models available now is also quite wide (Kropotkin and Domrin, 1996;Schindler and Birn, 2002;Sitnov et al, 2006;Zelenyi et al, 2004;Yoon and Lui, 2004) (see Sect. 6 for details).…”

Section: Introductionmentioning

confidence: 99%

Thin embedded current sheets: Cluster observations of ion kinetic structure and analytical models

et al. 2009

View full text Add to dashboard Cite

Abstract. Kinetic structure of embedded thin horizontal current sheets is investigated. Current density estimated by curlometer technique is in general agreement with a sum of electron and proton currents. Embedding of observed thin current sheets in the much wider plasma sheet is apparent in the current density profiles. Ion velocity distributions consist of two parts: the cold non-drifting core likely belongs to the plasma sheet background, while the hotter asymmetric "wings" carry the main portion of the current. Oxygen ions (if present) and higher-energy tails of distribution function can contribute up to 30% of the total current. We compared current density profiles across sheets with three typical current sheet models. Models which allow embedding, describe observed structures equally well at the level of experimental accuracy.

show abstract

THEMIS observations of the current sheet dynamics in response to the intrusion of the high‐velocity plasma flow into the near‐Earth magnetotail

et al. 2014

View full text Add to dashboard Cite

A small separation between Time History of Events and Macroscale Interactions during Substorms (THEMIS) probes allows us to analyze a sudden activation in the near-Earth current sheet (CS) at microscales. The start of the activation coincides with the appearance of an earthward plasma flow and dipolarization front (DF) at THEMIS location. The time sequence of observations of the fast plasma flow and the associated DF by three THEMIS probes denotes their dawnward displacement and the localization of the flow channel in the dawn-dusk direction. The onset of kink perturbations of the CS was generated on the dawn side of the flow. These fluctuations also propagated dawnward and were followed by the CS thinning (L~ρ i ) and by the development of tearing instability with transient appearance of a magnetic null point. The region of the unstable CS with a magnetic null point was localized in the X and, possibly, in the Y directions. The CS perturbations were most likely triggered by the intrusion of the fast flow into the ambient plasma in the course of the global dawnward displacement of the flow structure. Although no substorm onset was observed during the CS activation, a ground signature of a pseudobreakup was detected just after the excitement of the tearing mode in the near-Earth tail. Probably the pseudobreakup was caused by a localized diversion of the current, which could result from the disruption of the cross-tail current in a localized region of the near-Earth CS.

show abstract

Ion‐ion kink instability in the magnetotail: 1. Linear theory

Cited by 74 publications

References 39 publications

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

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

Thin embedded current sheets: Cluster observations of ion kinetic structure and analytical models

THEMIS observations of the current sheet dynamics in response to the intrusion of the high‐velocity plasma flow into the near‐Earth magnetotail

Contact Info

Product

Resources

About