Impulsive Magnetic Reconnection in Plasma

Hayashi, Yoshinori; Toru,; Inomoto, Michiaki; Ono, Yasushi

doi:10.1541/ieejfms.132.239

Cited by 1 publication

(2 citation statements)

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“…In laboratory experiments, the reconnection electric field is enhanced when a plasmoid is ejected out of a current sheet (Ono et al 2011;Hayashi et al 2012). This enables a more efficient particle acceleration and a reconnection rate enhancement, which is consistent with our results.…”

Section: Correspondence With Euv and X-ray Plasmoid Ejectionmentioning

confidence: 99%

“…This equation indicates that the plasmoid ejection induces a reconnection inflow, so that the ejection velocity has a good correlation with the inflow velocity. Even in the case of a compressible plasma, the inflow velocity and the net reconnection rate increase with the plasmoid ejection, when magnetic flux is piled up around a current sheet by the reconnection inflow at the same time as the plasmoid ejection (Ono et al 2011;Hayashi et al 2012). …”

Section: Introductionmentioning

confidence: 99%

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Particle Acceleration in Plasmoid Ejections Derived From Radio Drifting Pulsating Structures

Nishizuka

Karlický

Janvier

et al. 2015

ApJ

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We report observations of slowly drifting pulsating structures (DPS) in the 0.8-4.5 GHz frequency range of the RT4 and RT5 radiospectrographs at Ondřejov Observatory, between 2002 and 2012. We found 106 events of drifting pulsating structures, which we classified into 4 cases: (I) single events with a constant frequency drift [12 events], (II) multiple events occurring in the same flare with constant frequency drifts [11 events], (III) single or multiple events with increasing or decreasing frequency drift rates [52 events], and (IV) complex events containing multiple events occurring at the same time in the different frequency range [31 events]. Many DPSs are associated with hard X-ray bursts (15-25 keV) and soft X-ray gradient peaks, as they typically occurred at the beginning of the hard X-ray peaks. This indicates that DPS events are related to the processes of fast energy release and particle acceleration. Furthermore, interpreting DPSs as signatures of plasmoids, we measured their ejection velocity, their width and their height from the DPS spectra, from which we also estimated the reconnection rate and the plasma beta. In this interpretation, constant frequency drift indicates a constant velocity of a plasmoid, and an increasing/decreasing frequency drift indicates a deceleration/acceleration of a plasmoid ejection. The reconnection rate shows a good positive correlation with the plasmoid velocity. Finally we confirmed that some DPS events show plasmoid counterparts in AIA/SDO images.

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Section: Correspondence With Euv and X-ray Plasmoid Ejectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%