Kinetic simulations of secondary reconnection in the reconnection jet

Huang, Suming; Zhou, Meng; Yuan, Zhigang; Fu, Huishan; He, Jiansen; Sahraoui, Fouad; Aunai, N.; Deng, Xiaohua; Fu, Song; Pang, Y.; Wang, D. D.

doi:10.1002/2014ja020969

Cited by 34 publications

(31 citation statements)

References 39 publications

(51 reference statements)

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“…Our 2.5-D fully electromagnetic full particle code has been used to study the electric field structures inside the magnetic island, density cavity, and sub-structures of the separatrix near and/or within the magnetic reconnection region (Zhou et al, 2011(Zhou et al, , 2012a(Zhou et al, , b, 2014Huang et al, 2014Huang et al, , 2015. In this model, ions and electrons are regarded as individual particles.…”

Section: Simulation Resultsmentioning

confidence: 99%

Tripolar electric field Structure in guide field magnetic reconnection

Huang

Zhou

et al. 2018

Ann. Geophys.

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Abstract. It has been shown that the guide field substantially modifies the structure of the reconnection layer. For instance, the Hall magnetic and electric fields are distorted in guide field reconnection compared to reconnection without guide fields (i.e., anti-parallel reconnection). In this paper, we performed 2.5-D electromagnetic full particle simulation to study the electric field structures in magnetic reconnection under different initial guide fields (B g ). Once the amplitude of a guide field exceeds 0.3 times the asymptotic magnetic field B 0 , the traditional bipolar Hall electric field is clearly replaced by a tripolar electric field, which consists of a newly emerged electric field and the bipolar Hall electric field. The newly emerged electric field is a convective electric field about one ion inertial length away from the neutral sheet. It arises from the disappearance of the Hall electric field due to the substantial modification of the magnetic field and electric current by the imposed guide field. The peak magnitude of this new electric field increases linearly with the increment of guide field strength. Possible applications of these results to space observations are also discussed.

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Section: Simulation Resultsmentioning

confidence: 99%

Tripolar electric field Structure in guide field magnetic reconnection

Huang

Zhou

et al. 2018

Ann. Geophys.

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“…Slavin et al (2003) proposed the idea of "re-reconnection" that earthward moving MFRs may reconnect with the geomagnetic field and dissipate the magnetic energy stored in their earthward portion. Such process is later confirmed in the simulation of Huang, Zhou, et al (2015), and is considered to be important for triggering magnetospheric substorms (Ma & Lu, 2009;Winglee et al, 2009). Dissipation of the leading part of the MFR may lead to the highly asymmetric MFR, or dipolarization front which is quite common in the near-Earth tail Lu et al, 2015;Runov et al, 2009;Vogiatzis et al, 2015;Zhou et al, 2009).…”

Section: Introductionmentioning

confidence: 82%

In Situ Observation of Magnetic Reconnection Between an Earthward Propagating Flux Rope and the Geomagnetic Field

Man

Zhou

Deng

et al. 2018

Geophysical Research Letters

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It has been proposed that, in the near‐Earth magnetotail, earthward propagating flux ropes can merge with the Earth's dipole magnetic field and dissipate its magnetic energy. However, the reconnection diffusion region related to this process has not been identified. Here we report the first in situ observation of magnetic reconnection between an earthward propagating flux rope and the closed magnetic field lines connecting to Earth. Magnetospheric Multiscale (MMS) spacecraft crossed a vertical current sheet between the leading edge of the flux rope (negative Bz) and the geomagnetic field (positive Bz). The subion‐scale current sheet, super‐Alfvénic electron outflow, Hall magnetic and electric field, conversion of magnetic energy to plasma energy (J·E > 0), and magnetic null were observed during the crossing. All the above signatures indicate that MMS detected the reconnection diffusion region. This result is also relevant to other planets with intrinsic magnetosphere.

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“…Magnetic reconnection is one of the most important physical processes in space, astrophysical, and laboratory plasmas, which can effectively convert magnetic energy into plasma kinetic and thermal energy in a bursty way, changing the topology of the magnetic field. Flux ropes (FRs) are 3‐D helical magnetic structures in which magnetic field lines twist with each other and a strong core field generally exists; FRs can be formed by single X‐line or multiple X‐line magnetic reconnection (e.g., Deng et al, ; Fu et al, , , ; Huang, Pang, et al, ; Huang, Vaivads, et al, ; Huang, Zhou, et al, ; Huang, Zhou, et al, ; Lee & Fu, ; Nakamura & Scholer, ; Slavin et al, ; Zhou et al, , ). FRs have been frequently observed in the Earth's magnetosphere (e.g., Chen et al, ; Huang, Retino, et al, ; Huang, Sahraoui, et al, ; Huang, Vaivads, et al, ; Retinò et al, ; Slavin et al, ; Wang et al, ; Zhao, Wang, Lu, et al, ; Zong et al, ).…”

Section: Introductionmentioning

confidence: 99%

Observations of Flux Ropes With Strong Energy Dissipation in the Magnetotail

Huang

Jiang

Yuan

et al. 2019

Geophysical Research Letters

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An ion‐scale flux rope (FR), embedded in a high‐speed electron flow (possibly an electron vortex), is investigated in the magnetotail using observations from the Magnetospheric Multiscale (MMS) spacecraft. Intense electric field and current and abundant waves are observed in the exterior and interior regions of the FR. Comparable parallel and perpendicular currents in the interior region imply that the FR has a non‐force‐free configuration. Electron demagnetization occurs in some subregions of the FR. It is surprising that strong dissipation (J × E' up to 2,000 pW/m3) occurs in the center of the FR without signatures of secondary reconnection or coalescence of two FRs, implying that FR may provide another important channel for energy dissipation in space plasmas. These features indicate that the observed FR is still highly dynamical, and hosts multiscale coupling processes, even though the FR has a very large scale and is far away from the reconnection site.

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Kinetic simulations of secondary reconnection in the reconnection jet

Cited by 34 publications

References 39 publications

Tripolar electric field Structure in guide field magnetic reconnection

Tripolar electric field Structure in guide field magnetic reconnection

In Situ Observation of Magnetic Reconnection Between an Earthward Propagating Flux Rope and the Geomagnetic Field

Observations of Flux Ropes With Strong Energy Dissipation in the Magnetotail

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