474:: curved surfaces in space that divide different bundles of flux. Field lines on one side of the separatrix all terminate at a particular magnetic pole, while field lines on the other side all terminate at a different pole of similar sign. Since each field line generally begins at a north magnetic pole and ends at a south magnetic pole, the most general way of dividing simple flux systems involves four domains separated by two separatrices: one separatrix surface divides the flux into two bundles, each of which shares a south pole, and the other separatrix surface divides the flux into two bundles, each of which shares a north pole. The intersection of the separatrices forms a
2714:, and many other events in the solar atmosphere. The observational evidence for solar flares includes observations of inflows/outflows, downflowing loops, and changes in the magnetic topology. In the past, observations of the solar atmosphere were done using remote imaging; consequently, the magnetic fields were inferred or extrapolated rather than observed directly. However, the first direct observations of solar magnetic reconnection were gathered in 2012 (and released in 2013) by the
451:, magnetic field lines are grouped into 'domains'— bundles of field lines that connect from a particular place to another particular place, and that are topologically distinct from other field lines nearby. This topology is approximately preserved even when the magnetic field itself is strongly distorted by the presence of variable currents or motion of magnetic sources, because effects that might otherwise change the magnetic topology instead induce
1717:
collisionless physics, time-dependent effects, viscosity, compressibility, and downstream pressure. Numerical simulations of two-dimensional magnetic reconnection typically show agreement with this model. Results from the
Magnetic Reconnection Experiment (MRX) of collisional reconnection show agreement with a generalized Sweet–Parker model which incorporates compressibility, downstream pressure and anomalous resistivity.
2750:. have made observations of sufficient resolution and in multiple locations to observe the process directly and in-situ. Cluster II is a four-spacecraft mission, with the four spacecraft arranged in a tetrahedron to separate the spatial and temporal changes as the suite flies through space. It has observed numerous reconnection events in which the Earth's magnetic field reconnects with that of the Sun (i.e. the
2260:
is independent of small scale physics such as resistive effects and depends only on turbulent effects. Roughly speaking, in stochastic model, turbulence brings initially distant magnetic field lines to small separations where they can reconnect locally (Sweet-Parker type reconnection) and separate again due to turbulent super-linear diffusion (Richardson diffusion ). For a current sheet of the length
35:
above and below the separator, reconnect, and spring outward along the current sheet. In-situ spacecraft measurements in the magnetosphere and laboratory plasma experiments mean that this process is increasingly well understood: once started, it proceeds many orders of magnitude faster than predicted by the Parker-Sweet theory.
2259:
In stochastic reconnection, magnetic field has a small scale random component arising because of turbulence. For the turbulent flow in the reconnection region, a model for magnetohydrodynamic turbulence should be used such as the model developed by
Goldreich and Sridhar in 1995. This stochastic model
322:
prevents the build-up in plasma pressure that would otherwise choke off the inflow. In Parker-Sweet reconnection the outflow is only along a thin layer the centre of the current sheet and this limits the reconnection rate that can be achieved to low values. On the other hand, in
Petschek reconnection
1801:
and in particular rotational discontinuities (RDs). In cases of asymmetric plasma densities on the two sides of the current sheet (as at Earth's dayside magnetopause) the Alfvén wave that propagates into the inflow on higher-density side (in the case of the magnetopause the denser magnetosheath) has
1725:
The fundamental reason that
Petschek reconnection is faster than Parker-Sweet is that it broadens the outflow region and thereby removes some of the limitation caused by the build up in plasma pressure. The inflow velocity, and thus the reconnection rate, can only be very small if the outflow region
162:
dominate in such regions. The frozen-in flux theorem states that in such regions the field moves with the plasma velocity (the mean of the ion and electron velocities, weighted by their mass). The reconnection breakdown of this theorem occurs in regions of large magnetic shear (by Ampére's law these
129:
coined the term "reconnection" because he envisaged field lines and plasma moving together in an inflow toward a magnetic neutral point (2D) or line (3D), breaking apart and then rejoining again but with different magnetic field lines and plasma, in an outflow away from the magnetic neutral point or
1716:
Sweet–Parker reconnection allows for reconnection rates much faster than global diffusion, but is not able to explain the fast reconnection rates observed in solar flares, the Earth's magnetosphere, and laboratory plasmas. Additionally, Sweet–Parker reconnection neglects three-dimensional effects,
1805:
Simulations of resistive MHD reconnection with uniform resistivity showed the development of elongated current sheets in agreement with the Sweet–Parker model rather than the
Petschek model. When a localized anomalously large resistivity is used, however, Petschek reconnection can be realized in
350:
original thoughts: at each time step of the numerical model the equations of ideal MHD are solved at each grid point of the simulation to evaluate the new field and plasma conditions. The magnetic field lines then have to be re-traced. The tracing algorithm makes errors at thin current sheets and
507:
at a conference in 1956. Sweet pointed out that by pushing two plasmas with oppositely directed magnetic fields together, resistive diffusion is able to occur on a length scale much shorter than a typical equilibrium length scale. Parker was in attendance at this conference and developed scaling
383:
141:
at a conference in 1956. Sweet pointed out that by pushing two plasmas with oppositely directed magnetic fields together, resistive diffusion is able to occur on a length scale much shorter than a typical equilibrium length scale. Parker was in attendance at this conference and developed scaling
34:
Magnetic reconnection: This view is a cross-section through four magnetic domains undergoing separator Parker-Sweet reconnection. Two separatrices (see text) divide space into four magnetic domains with a separator at the center of the figure. Field lines (and associated plasma) flow inward from
179:
and the diffusion region is a very small region at the centre of the current sheet where field lines diffuse together, merge and reconfigure such that they are transferred from the topology of the inflow regions (i.e., along the current sheet) to that of the outflow regions (i.e., threading the
88:
The concept of magnetic reconnection was developed in parallel by researchers working in solar physics and in the interaction between the solar wind and magnetized planets. This reflects the bidirectional nature of reconnection, which can either disconnect formerly connected magnetic fields or
2773:
probes were able to determine the triggering event for the onset of magnetospheric substorms. Two of the five probes, positioned approximately one third the distance to the Moon, measured events suggesting a magnetic reconnection event 96 seconds prior to auroral intensification. Dr. Vassilis
309:
without the resistivity being enhanced. When the diffusing field lines from the two sites of the boundary touch they form the separatrices and so have both the topology of the inflow region (i.e. along the current sheet) and the outflow region (i.e., threading the current sheet). In magnetic
370:, for example, proceed 13–14 orders of magnitude faster than a naive calculation would suggest, and several orders of magnitude faster than current theoretical models that include turbulence and kinetic effects. One possible mechanism to explain the discrepancy is that the electromagnetic
1806:
resistive MHD simulations. Because the use of an anomalous resistivity is only appropriate when the particle mean free path is large compared to the reconnection layer, it is likely that other collisionless effects become important before
Petschek reconnection can be realized.
481:
In three dimensions, the geometry of the field lines become more complicated than the two-dimensional case and it is possible for reconnection to occur in regions where a separator does not exist, but with the field lines connected by steep gradients. These regions are known as
2790:
system, while experiments on the
Magnetic Reconnection Experiment (MRX) at the Princeton Plasma Physics Laboratory (PPPL) have confirmed many aspects of magnetic reconnection, including the Sweet–Parker model in regimes where the model is applicable. Analysis of the physics of
1726:
is narrow. In 1964, Harry
Petschek proposed a mechanism where the inflow and outflow regions are separated by stationary slow mode shocks that stand in the inflows. The aspect ratio of the diffusion region is then of order unity and the maximum reconnection rate becomes
978:
515:
describes time-independent magnetic reconnection in the resistive MHD framework when the reconnecting magnetic fields are antiparallel (oppositely directed) and effects related to viscosity and compressibility are unimportant. The initial velocity is simply an
351:
joins field lines up by threading the current sheet where they were previously aligned with the current sheet. This is often called "numerical resistivity" and the simulations have predictive value because the error propagates according to a diffusion equation.
2766:, launched on 13 March 2015, improved the spatial and temporal resolution of the Cluster II results by having a tighter constellation of spacecraft. This led to a better understanding of the behavior of the electrical currents in the electron diffusion region.
1500:
478:, a single line that is at the boundary of the four separate domains. In separator reconnection, field lines enter the separator from two of the domains, and are spliced one to the other, exiting the separator in the other two domains (see the first figure).
259:
111:. In the years 1947-1948, he published more papers further developing the reconnection model of solar flares. In these works, he proposed that the mechanism occurs at points of neutrality (weak or null magnetic field) within structured magnetic fields.
411:
from different magnetic domains (defined by the field line connectivity) are spliced to one another, changing their patterns of connectivity with respect to the sources. It is a violation of an approximate conservation law in plasma physics, called
1802:
a lower propagation speed and so the field rotation increasingly becomes at that RD as the field line propagates away from the reconnection site: hence the magnetopause current sheet becomes increasingly concentrated in the outer, slower, RD.
2130:
Nevertheless, if the drift velocity of electrons exceeds the thermal velocity of plasma, a steady state cannot be achieved and magnetic diffusivity should be much larger than what is given in the above. This is called anomalous resistivity,
31:
1188:
1282:
318:. The resulting drop in pressure pulls more plasma and magnetic flux into the central region, yielding a self-sustaining process. The importance of Dungey's concept of a localized breakdown of ideal-MHD is that the outflow along the
289:
and this equation reduces to Ampére's law for free charges. The displacement current is neglected in both the Parker-Sweet and
Petschek theoretical treatments of reconnection, discussed below, and in the derivation of ideal MHD and
2671:
1712:
40:
1937:
1796:
This expression allows for fast reconnection and is almost independent of the
Lundquist number. Theory and numerical simulations show that most of the actions of the shocks that were proposed by Petschek can be carried out by
1792:
390:
388:
386:
385:
726:
389:
2774:
Angelopoulos of the University of California, Los Angeles, who is the principal investigator for the THEMIS mission, claimed, "Our data show clearly and for the first time that magnetic reconnection is the trigger.".
1104:
is the outflow velocity. The left and right hand sides of the above relation represent the mass flux into the layer and out of the layer, respectively. Equating the upstream magnetic pressure with the downstream
885:
788:
4361:
Gekelman, W; Lawrence, E; Collette, A; Vincena, S; Compernolle, B Van; Pribyl, P; Berger, M; Campbell, J (2010-12-01). "Magnetic field line reconnection in the current systems of flux ropes and Alfvén waves".
267:(ionized gas), for all but exceptionally high frequency phenomena, the second term on the right-hand side of this equation, the displacement current, is negligible compared to the effect of the free current
345:
is avoided. Global numerical MHD models of the magnetosphere, which use the equations of ideal MHD, still simulate magnetic reconnection even though it is a breakdown of ideal MHD. The reason is close to
2396:
876:
3720:
Petschek, H. E., Magnetic Field Annihilation, in The Physics of Solar Flares, Proceedings of the AAS-NASA Symposium held 28–30 October 1963 at the Goddard Space Flight Center, Greenbelt, MD, p. 425, 1964
1417:
191:
2126:
1053:
387:
1573:
590:
2458:
2043:
333:
coined the term "reconnection" because he initially envisaged field lines of the inflow topology breaking and then joining together again in the outflow topology. However, this means that
2191:
2738:) were for many years inferred because they uniquely explained many aspects of the large-scale behaviour of the magnetosphere and its dependence on the orientation of the near-Earth
1112:
1380:
2003:
1215:
2156:
301:
from either side to diffuse through the current layer, cancelling outflux from the other side of the boundary. However, the small spatial scale of the current sheet makes the
2249:
45:
44:
41:
2578:
1102:
2758:
near the polar cusps; 'dayside reconnection', which allows the transmission of particles and energy into the Earth's vicinity and 'tail reconnection', which causes auroral
836:
673:
646:
46:
2681:
becomes important. Two-fluid simulations show the formation of an X-point geometry rather than the double Y-point geometry characteristic of resistive reconnection. The
1639:
287:
175:
dominate, meaning that the field diffuses through the plasma from regions of high field to regions of low field. In reconnection, the inflow and outflow regions both obey
1869:
1412:
3547:
Sweet, P. A., The Neutral Point Theory of Solar Flares, in IAU Symposium 6, Electromagnetic Phenomena in Cosmical Physics, ed. B. Lehnert (Dordrecht: Kluwer), 123, 1958
3238:
Sweet, P. A., The Neutral Point Theory of Solar Flares, in IAU Symposium 6, Electromagnetic Phenomena in Cosmical Physics, ed. B. Lehnert (Dordrecht: Kluwer), 123, 1958
2820:
plasma core. The Kadomtsev model describes sawtooth oscillations as a consequence of magnetic reconnection due to displacement of the central region with safety factor
540:
310:
reconnection the field lines evolve from the inflow topology through the separatrices topology to the outflow topology. When this happens, the plasma is pulled out by
180:
current sheet). The rate of this magnetic flux transfer is the electric field associated with both the inflow and the outflow and is called the "reconnection rate".
3462:
Mandrini, C. H.; Démoulin, P.; Van Driel-Gesztelyi, L.; Schmieder, B.; Cauzzi, G.; Hofmann, A. (September 1996). "3D magnetic reconnection at an X-ray bright point".
810:
4528:
2844:
2532:
2505:
1311:
1210:
1000:
619:
1959:
1729:
374:
in the boundary layer is sufficiently strong to scatter electrons, raising the plasma's local resistivity. This would allow the magnetic flux to diffuse faster.
416:(also called the "frozen-in flux theorem") and can concentrate mechanical or magnetic energy in both space and time. Solar flares, the largest explosions in the
384:
2478:
2278:
2063:
1862:
1842:
1635:
1615:
1595:
1525:
1335:
1075:
3513:
Bagalá, L. G.; Mandrini, C. H.; Rovira, M. G.; Démoulin, P. (November 2000). "Magnetic reconnection: a common origin for flares and AR interconnecting arcs".
2583:
327:) that stand in the inflow: this allows much faster escape of the plasma frozen-in on reconnected field lines and the reconnection rate can be much higher.
43:
731:
2689:. Because the ions can move through a wider "bottleneck" near the current layer and because the electrons are moving much faster in Hall MHD than in
117:
is credited with first use of the term “magnetic reconnection” in his 1950 PhD thesis, to explain the coupling of mass, energy and momentum from the
2285:
4150:
Burch, J. L.; Torbert, R. B.; Phan, T. D.; Chen, L.-J.; Moore, T. E.; Ergun, R. E.; Eastwood, J. P.; Gershman, D. J.; Cassak, P. A. (2016-06-03).
4005:
Kowal, G.; Lazarian, A.; Vishniac, E.; Otmianowska-Mazur, K. (2009). "Numerical Tests of Fast Reconnection in Weakly Stochastic Magnetic Fields".
678:
2070:
1009:
3057:
4583:, The Magnetospheric Multiscale (MMS) mission, Solving Magnetospheric Acceleration, Reconnection, and Turbulence. Due for launch in 2014.
3370:
Priest, E. R.; Démoulin, P. (1995). "Three-dimensional magnetic reconnection without null points: 1. Basic theory of magnetic flipping".
2677:
decouple from electrons and the magnetic field becomes frozen into the electron fluid rather than the bulk plasma. On these scales, the
2796:
2693:, reconnection may proceed more quickly. Two-fluid/collisionless reconnection is particularly important in the Earth's magnetosphere.
1530:
545:
154:" (also called the "frozen-in flux theorem") which applies to large-scale regions of a highly-conducting magnetoplasma, for which the
424:, releasing, in minutes, energy that has been stored in the magnetic field over a period of hours to days. Magnetic reconnection in
4562:
3313:
3288:
2763:
2747:
341:
that the divergence of the field is zero. However, by considering the evolution through the separatrix topology, the need to invoke
841:
42:
4318:
Lawrence, Eric E.; Gekelman, W (2009). "Identification of a Quasiseparatrix Layer in a Reconnecting Laboratory Magnetoplasma".
2196:
Another proposed mechanism is known as the Bohm diffusion across the magnetic field. This replaces the Ohmic resistivity with
973:{\displaystyle v_{\text{in}}={\frac {E_{y}}{B_{\text{in}}}}\sim {\frac {1}{\mu _{0}\sigma \delta }}={\frac {\eta }{\delta }},}
2715:
675:
is the characteristic upstream magnetic field strength. By neglecting displacement current, the low-frequency Ampere's law,
3304:
Hughes, J.W. (1995). "The magnetopause, magnetotail, and magnetic reconnection". In Kivelson, M. G.; Russell, C. T. (eds.).
4520:
2751:
2739:
2686:
103:. Giovanelli proposed in 1946 that solar flares stem from the energy obtained by charged particles influenced by induced
467:, in which four separate magnetic domains exchange magnetic field lines. Domains in a magnetic plasma are separated by
2403:
2008:
1495:{\displaystyle R={\frac {v_{\text{in}}}{v_{\text{out}}}}\sim {\frac {\eta }{v_{A}\delta }}\sim {\frac {\delta }{L}}.}
254:{\displaystyle \nabla \times \mathbf {B} =\mu \mathbf {J} +\mu \epsilon {\frac {\partial \mathbf {E} }{\partial t}}.}
2762:
by injecting particles deep into the magnetosphere and releasing the energy stored in the Earth's magnetotail. The
4623:
4414:
2942:"Flattening of the tokamak current profile by a fast magnetic reconnection with implications for the solar corona"
4618:
4457:"Plasmoids Formation During Simulations of Coaxial Helicity Injection in the National Spherical Torus Experiment"
2251:, however, its effect, similar to the anomalous resistivity, is still too small compared with the observations.
4628:
4571:
2807:
2161:
302:
168:
155:
1006:. When the inflow density is comparable to the outflow density, conservation of mass yields the relationship
3141:
Giovanelli, R.G. (1947). "Magnetic and Electric Phenomena in the Sun's Atmosphere associated with Sunspots".
2782:
Magnetic reconnection has also been observed in numerous laboratory experiments. For example, studies on the
812:
is the current sheet half-thickness. This relation uses that the magnetic field reverses over a distance of
3735:
1597:
are multiplied by each other and then square-rooted, giving a simple relation between the reconnection rate
1340:
4300:
1964:
311:
184:
3635:
Ji, Hantao; Yamada, Masaaki; Hsu, Scott; Kulsrud, Russell; Carter, Troy; Zaharia, Sorin (26 April 1999).
2134:
413:
291:
176:
151:
3279:
Priest, E.R. (1995). "The Sun and its magnetohydrodynamics". In Kivelson, M. G.; Russell, C. T. (eds.).
2786:
at UCLA have observed and mapped quasi-separatrix layers near the magnetic reconnection region of a two
2711:
96:
78:
338:
4586:
4138:
2199:
4478:
4429:
4371:
4327:
4256:
4225:
4163:
4081:
4024:
3963:
3908:
3869:
3814:
3771:
3695:
3648:
3601:
3566:
3557:
Parker, E. N. (December 1957). "Sweet's mechanism for merging magnetic fields in conducting fluids".
3522:
3471:
3426:
3379:
3342:
3020:
2963:
2898:
2690:
1821:
1003:
441:
408:
95:
is credited with the first publication invoking magnetic energy release as a potential mechanism for
4566:
2545:
1080:
2865:
2783:
1815:
815:
651:
624:
2810:
that uses fast magnetic reconnection to accelerate plasma to produce thrust for space propulsion.
270:
4502:
4468:
4395:
4282:
4207:
4099:
4071:
4040:
4014:
3987:
3953:
3926:
3838:
3805:
Jafari, Amir; Vishniac, Ethan (2019). "Topology and stochasticity of turbulent magnetic fields".
3787:
3761:
3749:
3495:
3124:
3038:
3010:
2979:
2953:
2922:
1385:
433:
342:
306:
172:
159:
4598:
4415:"Magnetic reconnection with Sweet-Parker characteristics in two-dimensional laboratory plasmas"
3637:"Magnetic reconnection with Sweet-Parker characteristics in two-dimensional laboratory plasmas"
1183:{\displaystyle {\frac {B_{\text{in}}^{2}}{2\mu _{0}}}\sim {\frac {\rho v_{\text{out}}^{2}}{2}}}
838:. By matching the ideal electric field outside of the layer with the resistive electric field
519:
4558:
4494:
4387:
4343:
4274:
4199:
4191:
3979:
3830:
3664:
3617:
3530:
3487:
3444:
3395:
3309:
3284:
3221:
3182:
3116:
3077:
2914:
2799:
2792:
469:
334:
85:
speed, which is the fundamental speed for mechanical information flow in a magnetized plasma.
66:
4383:
1277:{\displaystyle v_{\text{out}}\sim {\frac {B_{\text{in}}}{\sqrt {\mu _{0}\rho }}}\equiv v_{A}}
795:
133:
In the meantime, the first theoretical framework of magnetic reconnection was established by
4486:
4437:
4379:
4335:
4264:
4181:
4171:
4089:
4032:
3971:
3916:
3877:
3822:
3779:
3703:
3656:
3609:
3574:
3526:
3479:
3434:
3387:
3350:
3261:
3213:
3172:
3108:
3069:
3028:
2971:
2906:
2823:
2813:
1505:
1106:
500:
448:
359:
264:
134:
62:
3683:
3636:
2510:
2483:
1289:
1195:
985:
597:
2803:
2743:
2534:
is the Alfvén velocity. This model has been successfully tested by numerical simulations.
1944:
1824:
is constant. This can be estimated using the equation of motion for an electron with mass
455:
in the plasma; the eddy currents have the effect of canceling out the topological change.
1798:
324:
4482:
4433:
4375:
4331:
4260:
4167:
4085:
4028:
3967:
3912:
3873:
3818:
3775:
3699:
3652:
3605:
3570:
3475:
3430:
3383:
3346:
3024:
2967:
2902:
2666:{\displaystyle \omega _{pi}\equiv {\sqrt {\frac {n_{i}Z^{2}e^{2}}{\epsilon _{0}m_{i}}}}}
2463:
2263:
2048:
1847:
1827:
1620:
1600:
1580:
1510:
1320:
1314:
1060:
437:
104:
92:
82:
74:
70:
3033:
2998:
2941:
2754:). These include 'reverse reconnection' that causes sunward convection in the Earth's
4612:
4286:
4211:
4118:"High-Resolution Coronal Imager Photographs the Sun in UV Light at 19.3nm Wavelength"
4036:
3991:
3930:
3842:
3791:
3499:
3042:
2983:
2855:
2727:
1707:{\displaystyle R~\sim {\sqrt {\frac {\eta }{v_{A}L}}}={\frac {1}{S^{\frac {1}{2}}}}.}
504:
429:
319:
315:
298:
164:
138:
122:
4506:
4399:
4103:
3201:
1932:{\displaystyle {d{\mathbf {v} } \over dt}={e \over m}\mathbf {E} -\nu \mathbf {v} ,}
4490:
4339:
4044:
3128:
2926:
2860:
2731:
2158:, which can enhance the reconnection rate in the Sweet–Parker model by a factor of
452:
417:
347:
330:
294:
which is applied in those theories everywhere outside the small diffusion region.
126:
114:
3161:"Magnetic and Electric Phenomena in the Sun's Atmosphere associated with Sunspots"
879:
323:
the outflow region is much broader, being between shock fronts (now thought to be
4456:
4117:
3975:
3826:
3707:
2735:
2707:
2678:
1212:
is the mass density of the plasma. Solving for the outflow velocity then gives
367:
358:
is that observed reconnection happens much faster than predicted by MHD in high
150:
Magnetic reconnection is a breakdown of "ideal-magnetohydrodynamics" and so of "
100:
51:
3921:
3896:
3355:
3330:
3249:
89:
connect formerly disconnected magnetic fields, depending on the circumstances.
81:. Magnetic reconnection involves plasma flows at a substantial fraction of the
3944:
Jafari, Amir; Vishniac, Ethan (2019). "Magnetic stochasticity and diffusion".
3177:
3160:
2755:
371:
118:
4391:
4195:
3857:
3668:
3621:
3534:
3491:
3448:
3399:
3225:
3217:
3186:
3120:
3081:
1787:{\displaystyle {\frac {v_{\text{in}}}{v_{A}}}\approx {\frac {\pi }{8\ln S}}.}
4269:
4244:
4176:
4151:
4094:
4059:
3578:
3331:"On the characterization of magnetic reconnection in global MHD simulations"
3265:
2887:"In situ detection of collisionless reconnection in the Earth's magnetotail"
2787:
721:{\displaystyle \mathbf {J} ={\frac {1}{\mu _{0}}}\nabla \times \mathbf {B} }
499:
The first theoretical framework of magnetic reconnection was established by
17:
4498:
4347:
4278:
4226:"THEMIS Satellites Discover What Triggers Eruptions of the Northern Lights"
4203:
4186:
3983:
3858:"Toward a theory of interstellar turbulence. 2: Strong Alfvenic turbulence"
3834:
3096:
2918:
2886:
125:. The concept was published for the first time in a seminal paper in 1961.
4572:
Discoveries about magnetic reconnection in space could unlock fusion power
30:
3766:
3439:
3414:
2759:
2682:
2005:, then the above equation along with the definition of electric current,
486:, and have been observed in theoretical configurations and solar flares.
2997:
Zhu, Chunming; Liu, Rui; Alexander, David; McAteer, R. T. James (2016).
1382:
using the result earlier derived from Ohm's law, the second in terms of
420:, may involve the reconnection of large systems of magnetic flux on the
3895:
Jafari, Amir; Vishniac, Ethan; Kowal, Grzegorz; Lazarian, Alex (2018).
3752:; Vishniac, Ethan (1999). "Reconnection in a Weakly Stochastic Field".
3483:
2817:
355:
108:
3684:"Experimental Test of the Sweet-Parker Model of Magnetic Reconnection"
3413:
Titov, Vyacheslav S.; Hornig, Gunnar; Démoulin, Pascal (August 2002).
3391:
3073:
2975:
183:
The equivalence of magnetic shear and current can be seen from one of
4441:
3660:
3613:
3112:
2910:
2770:
407:
The qualitative description of the reconnection process is such that
4139:
Articles on measurements made from the Cluster II spacecraft mission
4058:
Kowal, G; Lazarian, A.; Vishniac, E.; Otmianowska-Mazur, K. (2012).
3250:"Sweet's mechanism for merging magnetic fields in conducting fluids"
2507:
are turbulence injection length scale and velocity respectively and
463:
In two dimensions, the most common type of magnetic reconnection is
305:
small and so this alone can make the diffusion term dominate in the
4473:
3958:
3881:
3783:
3015:
2958:
783:{\displaystyle J_{y}\sim {\frac {B_{\text{in}}}{\mu _{0}\delta }},}
337:
would exist, albeit for a very limited period, which would violate
314:
acting on the reconfigured field lines and ejecting them along the
4521:"How Dr. Fatima Ebrahimi is Geting Humans a Faster Ticket to Mars"
4076:
4060:"Reconnection studies under different types of turbulence driving"
4019:
3682:
Ji, Hantao; Yamada, Masaaki; Hsu, Scott; Kulsrud, Russell (1998).
2999:"Observation of the Evolution of a Current Sheet in a Solar Flare"
425:
29:
1317:. With the above relations, the dimensionless reconnection rate
3592:
Biskamp, D. (1986). "Magnetic reconnection via current sheets".
3308:. Cambridge U.K.: Cambridge University press. pp. 227–285.
4152:"Electron-scale measurements of magnetic reconnection in space"
3283:. Cambridge U.K.: Cambridge University press. pp. 58–90.
2674:
421:
395:
3058:"Magnetic field reconnection: A first-principles perspective"
2391:{\displaystyle v=v_{\text{turb}}\;\operatorname {min} \left,}
1820:
In the Sweet–Parker model, the common assumption is that the
871:{\displaystyle \mathbf {E} ={\frac {1}{\sigma }}\mathbf {J} }
4580:
3897:"Stochastic Reconnection for Large Magnetic Prandtl Numbers"
2795:
injection, used to create the initial plasma current in the
61:
is a physical process occurring in electrically conducting
171:
can become small enough to make the diffusion term in the
2121:{\displaystyle \eta =\nu {c^{2} \over \omega _{pi}^{2}}.}
1816:
Spitzer resistivity § Disagreements with observation
1048:{\displaystyle v_{\text{in}}L\sim v_{\text{out}}\delta ,}
2280:, the upper limit for reconnection velocity is given by
1337:
can then be written in two forms, the first in terms of
4603:
2726:
Magnetic reconnection events that occur in the Earth's
1961:
is the collision frequency. Since in the steady state,
3056:
Mozer, Forrest S.; Pritchett, Philip L. (2010-06-01).
2542:
On length scales shorter than the ion inertial length
3415:"Theory of magnetic connectivity in the solar corona"
3202:"Interplanetary Magnetic Field and the Auroral Zones"
2826:
2586:
2548:
2513:
2486:
2466:
2406:
2288:
2266:
2202:
2164:
2137:
2073:
2051:
2011:
1967:
1947:
1872:
1850:
1830:
1732:
1642:
1623:
1603:
1583:
1533:
1513:
1420:
1388:
1343:
1323:
1292:
1218:
1198:
1115:
1083:
1063:
1012:
988:
888:
844:
818:
798:
734:
681:
654:
627:
600:
548:
522:
273:
194:
158:
is very large: this makes the convective term in the
508:relations for this model during his return travel.
436:, and it is important to the science of controlled
142:relations for this model during his return travel.
2838:
2665:
2572:
2526:
2499:
2472:
2452:
2390:
2272:
2243:
2185:
2150:
2120:
2057:
2037:
1997:
1953:
1931:
1856:
1836:
1786:
1706:
1629:
1609:
1589:
1567:
1519:
1494:
1406:
1374:
1329:
1305:
1276:
1204:
1182:
1096:
1069:
1047:
994:
972:
870:
830:
804:
782:
720:
667:
640:
613:
584:
534:
281:
253:
69:is rearranged and magnetic energy is converted to
3165:Monthly Notices of the Royal Astronomical Society
3143:Monthly Notices of the Royal Astronomical Society
1568:{\displaystyle S\equiv {\frac {Lv_{A}}{\eta }},}
585:{\displaystyle E_{y}=v_{\text{in}}B_{\text{in}}}
50:The evolution of magnetic reconnection during a
2453:{\displaystyle v_{\text{turb}}=v_{l}^{2}/v_{A}}
2038:{\displaystyle {\mathbf {J} }=en{\mathbf {v} }}
3419:Journal of Geophysical Research: Space Physics
3329:Laitinen, T. V.; et al. (November 2006).
4245:"Tail Reconnection Triggering Substorm Onset"
432:is one of the mechanisms responsible for the
167:) which are regions of small width where the
8:
2816:are periodic mixing events occurring in the
2685:are then accelerated to very high speeds by
1077:is the half-length of the current sheet and
297:The resistivity of the current layer allows
2538:Non-MHD process: Collisionless reconnection
648:is the characteristic inflow velocity, and
2305:
4472:
4268:
4185:
4175:
4093:
4075:
4018:
3957:
3920:
3765:
3438:
3354:
3176:
3032:
3014:
2957:
2825:
2653:
2643:
2631:
2621:
2611:
2603:
2591:
2585:
2561:
2552:
2547:
2518:
2512:
2491:
2485:
2465:
2444:
2435:
2429:
2424:
2411:
2405:
2369:
2355:
2336:
2322:
2299:
2287:
2265:
2227:
2212:
2207:
2201:
2186:{\displaystyle \eta _{\text{anom}}/\eta }
2175:
2169:
2163:
2142:
2136:
2107:
2099:
2089:
2083:
2072:
2050:
2029:
2028:
2013:
2012:
2010:
1978:
1972:
1971:
1966:
1946:
1921:
1910:
1900:
1880:
1879:
1873:
1871:
1849:
1829:
1760:
1749:
1739:
1733:
1731:
1688:
1679:
1663:
1652:
1641:
1622:
1602:
1582:
1550:
1540:
1532:
1512:
1479:
1464:
1454:
1443:
1433:
1427:
1419:
1387:
1363:
1342:
1322:
1297:
1291:
1268:
1249:
1238:
1232:
1223:
1217:
1197:
1168:
1163:
1153:
1141:
1127:
1122:
1116:
1114:
1088:
1082:
1062:
1033:
1017:
1011:
987:
957:
939:
929:
918:
908:
902:
893:
887:
863:
853:
845:
843:
817:
797:
765:
754:
748:
739:
733:
713:
699:
690:
682:
680:
659:
653:
632:
626:
605:
599:
576:
566:
553:
547:
521:
274:
272:
232:
226:
212:
201:
193:
2885:Øieroset, M.; et al. (2001-07-26).
1810:Anomalous resistivity and Bohm diffusion
381:
38:
2877:
2065:is the electron number density, yields
440:because it is one mechanism preventing
4604:Magnetic Reconnection Experiment (MRX)
4301:"Secret of Colorful Auroras Revealed"
1375:{\displaystyle (\eta ,\delta ,v_{A})}
495:Slow reconnection: Sweet–Parker model
394:A magnetic reconnection event on the
7:
2706:Magnetic reconnection occurs during
1998:{\displaystyle d{\mathbf {v} }/dt=0}
621:is the out-of-plane electric field,
4557:, Cambridge University Press 2000,
4531:from the original on March 11, 2021
3856:Goldreich, P.; Sridhar, S. (1995).
2742:. Subsequently, spacecraft such as
2151:{\displaystyle \eta _{\text{anom}}}
4587:Cluster spacecraft science results
4567:contents and sample chapter online
4384:10.1088/0031-8949/2010/t142/014032
3097:"A Theory of Chromospheric Flares"
2846:caused by the internal kink mode.
707:
239:
229:
195:
25:
4064:Nonlinear Processes in Geophysics
2764:Magnetospheric Multiscale Mission
2748:Magnetospheric Multiscale Mission
1721:Fast reconnection: Petschek model
1577:the two different expressions of
1414:from the conservation of mass as
4455:Ebrahimi, Fatima (20 May 2015).
4413:Ji, H.; et al. (May 1999).
3159:Giovanelli, R. G. (1947-11-01).
2244:{\displaystyle v_{A}^{2}(mc/eB)}
2030:
2014:
1973:
1922:
1911:
1881:
864:
846:
714:
683:
275:
233:
213:
202:
4120:. AZonano.com. January 24, 2013
3559:Journal of Geophysical Research
3372:Journal of Geophysical Research
3254:Journal of Geophysical Research
3248:Parker, E. N. (December 1957).
3095:Giovanelli, R. G. (July 1946).
2940:Boozer, Allen H. (2020-05-18).
4491:10.1103/PhysRevLett.114.205003
4340:10.1103/PhysRevLett.103.105002
4243:Vassilis Angelopoulos (2008).
2716:High Resolution Coronal Imager
2673:is the ion plasma frequency),
2573:{\displaystyle c/\omega _{pi}}
2238:
2218:
1401:
1389:
1369:
1344:
1097:{\displaystyle v_{\text{out}}}
484:quasi-separatrix layers (QSLs)
447:In an electrically conductive
1:
3306:Introduction to Space Physics
3281:Introduction to Space Physics
2778:Laboratory plasma experiments
2752:Interplanetary Magnetic Field
2740:Interplanetary magnetic field
2721:
831:{\displaystyle \sim 2\delta }
668:{\displaystyle B_{\text{in}}}
641:{\displaystyle v_{\text{in}}}
3200:Dungey, J. W. (1961-01-15).
354:A current problem in plasma
282:{\displaystyle \mathbf {J} }
4553:Eric Priest, Terry Forbes,
3976:10.1103/PhysRevE.100.043205
3827:10.1103/PhysRevE.100.013201
3708:10.1103/PhysRevLett.80.3256
3034:10.3847/2041-8205/821/2/L29
1407:{\displaystyle (\delta ,L)}
4645:
4037:10.1088/0004-637X/700/1/63
3515:Astronomy and Astrophysics
3356:10.5194/angeo-24-3059-2006
2784:Large Plasma Device (LAPD)
1813:
364:fast magnetic reconnection
107:within close proximity of
4007:The Astrophysical Journal
3901:The Astrophysical Journal
3862:The Astrophysical Journal
3754:The Astrophysical Journal
3003:The Astrophysical Journal
1617:and the Lundquist number
535:{\displaystyle E\times B}
27:Process in plasma physics
3922:10.3847/1538-4357/aac517
3732:Cosmical Magnetic Fields
3425:(A8): SSH 3-1–SSH 3-13.
3218:10.1103/PhysRevLett.6.47
1504:Since the dimensionless
878:inside the layer (using
490:Theoretical descriptions
303:Magnetic Reynolds Number
169:Magnetic Reynolds Number
156:Magnetic Reynolds Number
4461:Physical Review Letters
4320:Physical Review Letters
4270:10.1126/science.1160495
4177:10.1126/science.aaf2939
4095:10.5194/npg-19-297-2012
3736:Oxford University Press
3688:Physical Review Letters
3579:10.1029/JZ062i004p00509
3527:2000A&A...363..779B
3266:10.1029/JZ062i004p00509
3206:Physical Review Letters
3178:10.1093/mnras/107.4.338
2255:Stochastic reconnection
805:{\displaystyle \delta }
403:Physical interpretation
4581:Nasa MMS-SMART mission
3730:Parker, E. G. (1979).
2840:
2839:{\displaystyle q<1}
2712:coronal mass ejections
2667:
2574:
2528:
2501:
2474:
2454:
2392:
2274:
2245:
2187:
2152:
2122:
2059:
2039:
1999:
1955:
1933:
1858:
1838:
1788:
1708:
1631:
1611:
1591:
1569:
1521:
1496:
1408:
1376:
1331:
1307:
1278:
1206:
1184:
1098:
1071:
1049:
996:
974:
872:
832:
806:
784:
722:
669:
642:
615:
586:
536:
465:separator reconnection
399:
312:Magnetic tension force
283:
255:
146:Fundamental principles
55:
36:
4555:Magnetic Reconnection
4527:. February 11, 2021.
2841:
2814:Sawtooth oscillations
2769:On 26 February 2008,
2722:Earth's magnetosphere
2668:
2575:
2529:
2527:{\displaystyle v_{A}}
2502:
2500:{\displaystyle v_{l}}
2475:
2455:
2393:
2275:
2246:
2188:
2153:
2123:
2060:
2040:
2000:
1956:
1934:
1859:
1839:
1789:
1709:
1632:
1612:
1592:
1570:
1522:
1497:
1409:
1377:
1332:
1308:
1306:{\displaystyle v_{A}}
1279:
1207:
1205:{\displaystyle \rho }
1185:
1099:
1072:
1050:
997:
995:{\displaystyle \eta }
975:
873:
833:
807:
785:
728:, gives the relation
723:
670:
643:
616:
614:{\displaystyle E_{y}}
587:
537:
459:Types of reconnection
393:
284:
256:
97:particle acceleration
79:particle acceleration
59:Magnetic reconnection
49:
33:
4599:Magnetism on the Sun
3440:10.1029/2001ja000278
2824:
2584:
2546:
2511:
2484:
2464:
2404:
2286:
2264:
2200:
2162:
2135:
2071:
2049:
2009:
1965:
1954:{\displaystyle \nu }
1945:
1870:
1848:
1844:and electric charge
1828:
1822:magnetic diffusivity
1730:
1640:
1621:
1601:
1581:
1531:
1511:
1418:
1386:
1341:
1321:
1290:
1216:
1196:
1113:
1081:
1061:
1010:
1004:magnetic diffusivity
986:
886:
842:
816:
796:
732:
679:
652:
625:
598:
546:
520:
444:of the fusion fuel.
442:magnetic confinement
409:magnetic field lines
271:
192:
4483:2015PhRvL.114t5003E
4434:1999PhPl....6.1743J
4376:2010PhST..142a4032G
4332:2009PhRvL.103j5002L
4261:2008Sci...321..931A
4168:2016Sci...352.2939B
4086:2012NPGeo..19..297K
4029:2009ApJ...700...63K
3968:2019PhRvE.100d3205J
3913:2018ApJ...860...52J
3874:1995ApJ...438..763G
3819:2019PhRvE.100a3201J
3776:1999ApJ...517..700L
3700:1998PhRvL..80.3256J
3653:1999PhPl....6.1743J
3606:1986PhFl...29.1520B
3571:1957JGR....62..509P
3476:1996SoPh..168..115M
3431:2002JGRA..107.1164T
3384:1995JGR...10023443P
3347:2006AnGeo..24.3059L
3335:Annales Geophysicae
3025:2016ApJ...821L..29Z
2968:2020PhPl...27j2305B
2903:2001Natur.412..414O
2866:Magnetic switchback
2434:
2217:
2112:
1173:
1132:
185:Maxwell's equations
4422:Physics of Plasmas
3641:Physics of Plasmas
3484:10.1007/bf00145829
2946:Physics of Plasmas
2836:
2663:
2570:
2524:
2497:
2470:
2450:
2420:
2388:
2270:
2241:
2203:
2183:
2148:
2118:
2095:
2055:
2035:
1995:
1951:
1929:
1854:
1834:
1784:
1704:
1627:
1607:
1587:
1565:
1517:
1492:
1404:
1372:
1327:
1303:
1274:
1202:
1180:
1159:
1118:
1094:
1067:
1045:
992:
970:
868:
828:
802:
780:
718:
665:
638:
611:
582:
532:
513:Sweet–Parker model
400:
343:magnetic monopoles
339:Maxwell's equation
335:magnetic monopoles
307:induction equation
279:
251:
173:induction equation
160:induction equation
56:
37:
4624:Stellar phenomena
4255:(5891): 931–935.
4162:(6290): aaf2939.
3946:Physical Review E
3807:Physical Review E
3694:(15): 3256–3259.
3594:Physics of Fluids
3392:10.1029/95ja02740
3341:(11): 3059–2069.
3074:10.1063/1.3455250
2976:10.1063/5.0014107
2897:(6845): 414–417.
2800:spherical tokamak
2661:
2660:
2473:{\displaystyle l}
2414:
2377:
2363:
2344:
2330:
2302:
2273:{\displaystyle L}
2172:
2145:
2113:
2058:{\displaystyle n}
1908:
1895:
1857:{\displaystyle e}
1837:{\displaystyle m}
1779:
1755:
1742:
1699:
1696:
1674:
1673:
1648:
1630:{\displaystyle S}
1610:{\displaystyle R}
1590:{\displaystyle R}
1560:
1520:{\displaystyle S}
1487:
1474:
1449:
1446:
1436:
1330:{\displaystyle R}
1259:
1258:
1241:
1226:
1178:
1166:
1148:
1125:
1091:
1070:{\displaystyle L}
1036:
1020:
965:
952:
924:
921:
896:
861:
775:
757:
705:
662:
635:
579:
569:
391:
246:
67:magnetic topology
47:
16:(Redirected from
4636:
4619:Plasma phenomena
4541:
4540:
4538:
4536:
4517:
4511:
4510:
4476:
4452:
4446:
4445:
4442:10.1063/1.873432
4428:(5): 1743–1750.
4419:
4410:
4404:
4403:
4358:
4352:
4351:
4315:
4309:
4308:
4297:
4291:
4290:
4272:
4240:
4234:
4233:
4222:
4216:
4215:
4189:
4179:
4147:
4141:
4136:
4130:
4129:
4127:
4125:
4114:
4108:
4107:
4097:
4079:
4055:
4049:
4048:
4022:
4002:
3996:
3995:
3961:
3941:
3935:
3934:
3924:
3892:
3886:
3885:
3853:
3847:
3846:
3802:
3796:
3795:
3769:
3767:astro-ph/9811037
3746:
3740:
3739:
3727:
3721:
3718:
3712:
3711:
3679:
3673:
3672:
3661:10.1063/1.873432
3647:(5): 1743–1750.
3632:
3626:
3625:
3614:10.1063/1.865670
3600:(5): 1520–1531.
3589:
3583:
3582:
3554:
3548:
3545:
3539:
3538:
3510:
3504:
3503:
3459:
3453:
3452:
3442:
3410:
3404:
3403:
3367:
3361:
3360:
3358:
3326:
3320:
3319:
3301:
3295:
3294:
3276:
3270:
3269:
3245:
3239:
3236:
3230:
3229:
3197:
3191:
3190:
3180:
3156:
3150:
3139:
3133:
3132:
3113:10.1038/158081a0
3092:
3086:
3085:
3053:
3047:
3046:
3036:
3018:
2994:
2988:
2987:
2961:
2937:
2931:
2930:
2911:10.1038/35086520
2882:
2845:
2843:
2842:
2837:
2730:(in the dayside
2702:Solar atmosphere
2672:
2670:
2669:
2664:
2662:
2659:
2658:
2657:
2648:
2647:
2637:
2636:
2635:
2626:
2625:
2616:
2615:
2605:
2604:
2599:
2598:
2579:
2577:
2576:
2571:
2569:
2568:
2556:
2533:
2531:
2530:
2525:
2523:
2522:
2506:
2504:
2503:
2498:
2496:
2495:
2479:
2477:
2476:
2471:
2459:
2457:
2456:
2451:
2449:
2448:
2439:
2433:
2428:
2416:
2415:
2412:
2397:
2395:
2394:
2389:
2384:
2380:
2379:
2378:
2370:
2368:
2364:
2356:
2346:
2345:
2337:
2335:
2331:
2323:
2304:
2303:
2300:
2279:
2277:
2276:
2271:
2250:
2248:
2247:
2242:
2231:
2216:
2211:
2192:
2190:
2189:
2184:
2179:
2174:
2173:
2170:
2157:
2155:
2154:
2149:
2147:
2146:
2143:
2127:
2125:
2124:
2119:
2114:
2111:
2106:
2094:
2093:
2084:
2064:
2062:
2061:
2056:
2044:
2042:
2041:
2036:
2034:
2033:
2018:
2017:
2004:
2002:
2001:
1996:
1982:
1977:
1976:
1960:
1958:
1957:
1952:
1938:
1936:
1935:
1930:
1925:
1914:
1909:
1901:
1896:
1894:
1886:
1885:
1884:
1874:
1863:
1861:
1860:
1855:
1843:
1841:
1840:
1835:
1793:
1791:
1790:
1785:
1780:
1778:
1761:
1756:
1754:
1753:
1744:
1743:
1740:
1734:
1713:
1711:
1710:
1705:
1700:
1698:
1697:
1689:
1680:
1675:
1672:
1668:
1667:
1654:
1653:
1646:
1636:
1634:
1633:
1628:
1616:
1614:
1613:
1608:
1596:
1594:
1593:
1588:
1574:
1572:
1571:
1566:
1561:
1556:
1555:
1554:
1541:
1526:
1524:
1523:
1518:
1506:Lundquist number
1501:
1499:
1498:
1493:
1488:
1480:
1475:
1473:
1469:
1468:
1455:
1450:
1448:
1447:
1444:
1438:
1437:
1434:
1428:
1413:
1411:
1410:
1405:
1381:
1379:
1378:
1373:
1368:
1367:
1336:
1334:
1333:
1328:
1312:
1310:
1309:
1304:
1302:
1301:
1283:
1281:
1280:
1275:
1273:
1272:
1260:
1254:
1253:
1244:
1243:
1242:
1239:
1233:
1228:
1227:
1224:
1211:
1209:
1208:
1203:
1189:
1187:
1186:
1181:
1179:
1174:
1172:
1167:
1164:
1154:
1149:
1147:
1146:
1145:
1131:
1126:
1123:
1117:
1107:dynamic pressure
1103:
1101:
1100:
1095:
1093:
1092:
1089:
1076:
1074:
1073:
1068:
1054:
1052:
1051:
1046:
1038:
1037:
1034:
1022:
1021:
1018:
1001:
999:
998:
993:
979:
977:
976:
971:
966:
958:
953:
951:
944:
943:
930:
925:
923:
922:
919:
913:
912:
903:
898:
897:
894:
882:), we find that
877:
875:
874:
869:
867:
862:
854:
849:
837:
835:
834:
829:
811:
809:
808:
803:
789:
787:
786:
781:
776:
774:
770:
769:
759:
758:
755:
749:
744:
743:
727:
725:
724:
719:
717:
706:
704:
703:
691:
686:
674:
672:
671:
666:
664:
663:
660:
647:
645:
644:
639:
637:
636:
633:
620:
618:
617:
612:
610:
609:
591:
589:
588:
583:
581:
580:
577:
571:
570:
567:
558:
557:
541:
539:
538:
533:
414:Alfvén's theorem
392:
360:Lundquist number
292:Alfvén's theorem
288:
286:
285:
280:
278:
260:
258:
257:
252:
247:
245:
237:
236:
227:
216:
205:
177:Alfvén's theorem
152:Alfvén's theorem
48:
21:
4644:
4643:
4639:
4638:
4637:
4635:
4634:
4633:
4629:Solar phenomena
4609:
4608:
4595:
4576:6 February 2008
4550:
4548:Further reading
4545:
4544:
4534:
4532:
4519:
4518:
4514:
4454:
4453:
4449:
4417:
4412:
4411:
4407:
4364:Physica Scripta
4360:
4359:
4355:
4317:
4316:
4312:
4307:. 24 July 2008.
4299:
4298:
4294:
4242:
4241:
4237:
4224:
4223:
4219:
4149:
4148:
4144:
4137:
4133:
4123:
4121:
4116:
4115:
4111:
4057:
4056:
4052:
4004:
4003:
3999:
3943:
3942:
3938:
3894:
3893:
3889:
3855:
3854:
3850:
3804:
3803:
3799:
3748:
3747:
3743:
3729:
3728:
3724:
3719:
3715:
3681:
3680:
3676:
3634:
3633:
3629:
3591:
3590:
3586:
3556:
3555:
3551:
3546:
3542:
3512:
3511:
3507:
3461:
3460:
3456:
3412:
3411:
3407:
3369:
3368:
3364:
3328:
3327:
3323:
3316:
3303:
3302:
3298:
3291:
3278:
3277:
3273:
3247:
3246:
3242:
3237:
3233:
3199:
3198:
3194:
3158:
3157:
3153:
3140:
3136:
3107:(4003): 81–82.
3094:
3093:
3089:
3055:
3054:
3050:
2996:
2995:
2991:
2939:
2938:
2934:
2884:
2883:
2879:
2874:
2852:
2822:
2821:
2808:plasma thruster
2804:Fatima Ebrahimi
2780:
2724:
2704:
2699:
2649:
2639:
2638:
2627:
2617:
2607:
2606:
2587:
2582:
2581:
2557:
2544:
2543:
2540:
2514:
2509:
2508:
2487:
2482:
2481:
2462:
2461:
2440:
2407:
2402:
2401:
2351:
2350:
2318:
2317:
2316:
2312:
2295:
2284:
2283:
2262:
2261:
2257:
2198:
2197:
2165:
2160:
2159:
2138:
2133:
2132:
2085:
2069:
2068:
2047:
2046:
2007:
2006:
1963:
1962:
1943:
1942:
1887:
1875:
1868:
1867:
1846:
1845:
1826:
1825:
1818:
1812:
1765:
1745:
1735:
1728:
1727:
1723:
1684:
1659:
1658:
1638:
1637:
1619:
1618:
1599:
1598:
1579:
1578:
1546:
1542:
1529:
1528:
1509:
1508:
1460:
1459:
1439:
1429:
1416:
1415:
1384:
1383:
1359:
1339:
1338:
1319:
1318:
1315:Alfvén velocity
1293:
1288:
1287:
1264:
1245:
1234:
1219:
1214:
1213:
1194:
1193:
1155:
1137:
1133:
1111:
1110:
1084:
1079:
1078:
1059:
1058:
1029:
1013:
1008:
1007:
984:
983:
935:
934:
914:
904:
889:
884:
883:
840:
839:
814:
813:
794:
793:
761:
760:
750:
735:
730:
729:
695:
677:
676:
655:
650:
649:
628:
623:
622:
601:
596:
595:
572:
562:
549:
544:
543:
518:
517:
497:
492:
461:
405:
382:
380:
269:
268:
238:
228:
190:
189:
148:
105:electric fields
65:, in which the
39:
28:
23:
22:
15:
12:
11:
5:
4642:
4640:
4632:
4631:
4626:
4621:
4611:
4610:
4607:
4606:
4601:
4594:
4593:External links
4591:
4590:
4589:
4584:
4578:
4569:
4549:
4546:
4543:
4542:
4512:
4467:(20): 205003.
4447:
4405:
4353:
4326:(10): 105002.
4310:
4292:
4235:
4232:. 7 June 2013.
4217:
4142:
4131:
4109:
4070:(2): 297–314.
4050:
3997:
3936:
3887:
3882:10.1086/175121
3848:
3797:
3784:10.1086/307233
3760:(2): 700–718.
3750:Lazarian, Alex
3741:
3722:
3713:
3674:
3627:
3584:
3565:(4): 509–520.
3549:
3540:
3505:
3470:(1): 115–133.
3454:
3405:
3378:(A12): 23443.
3362:
3321:
3314:
3296:
3289:
3271:
3260:(4): 509–520.
3240:
3231:
3192:
3171:(4): 338–355.
3151:
3149:(4): 338–355.
3134:
3087:
3048:
2989:
2952:(10): 102305.
2932:
2876:
2875:
2873:
2870:
2869:
2868:
2863:
2858:
2851:
2848:
2835:
2832:
2829:
2779:
2776:
2723:
2720:
2703:
2700:
2698:
2695:
2687:Whistler waves
2656:
2652:
2646:
2642:
2634:
2630:
2624:
2620:
2614:
2610:
2602:
2597:
2594:
2590:
2567:
2564:
2560:
2555:
2551:
2539:
2536:
2521:
2517:
2494:
2490:
2469:
2447:
2443:
2438:
2432:
2427:
2423:
2419:
2410:
2387:
2383:
2376:
2373:
2367:
2362:
2359:
2354:
2349:
2343:
2340:
2334:
2329:
2326:
2321:
2315:
2311:
2308:
2298:
2294:
2291:
2269:
2256:
2253:
2240:
2237:
2234:
2230:
2226:
2223:
2220:
2215:
2210:
2206:
2182:
2178:
2168:
2141:
2117:
2110:
2105:
2102:
2098:
2092:
2088:
2082:
2079:
2076:
2054:
2032:
2027:
2024:
2021:
2016:
1994:
1991:
1988:
1985:
1981:
1975:
1970:
1950:
1928:
1924:
1920:
1917:
1913:
1907:
1904:
1899:
1893:
1890:
1883:
1878:
1853:
1833:
1811:
1808:
1783:
1777:
1774:
1771:
1768:
1764:
1759:
1752:
1748:
1738:
1722:
1719:
1703:
1695:
1692:
1687:
1683:
1678:
1671:
1666:
1662:
1657:
1651:
1645:
1626:
1606:
1586:
1564:
1559:
1553:
1549:
1545:
1539:
1536:
1516:
1491:
1486:
1483:
1478:
1472:
1467:
1463:
1458:
1453:
1442:
1432:
1426:
1423:
1403:
1400:
1397:
1394:
1391:
1371:
1366:
1362:
1358:
1355:
1352:
1349:
1346:
1326:
1300:
1296:
1271:
1267:
1263:
1257:
1252:
1248:
1237:
1231:
1222:
1201:
1177:
1171:
1162:
1158:
1152:
1144:
1140:
1136:
1130:
1121:
1087:
1066:
1044:
1041:
1032:
1028:
1025:
1016:
991:
969:
964:
961:
956:
950:
947:
942:
938:
933:
928:
917:
911:
907:
901:
892:
866:
860:
857:
852:
848:
827:
824:
821:
801:
779:
773:
768:
764:
753:
747:
742:
738:
716:
712:
709:
702:
698:
694:
689:
685:
658:
631:
608:
604:
575:
565:
561:
556:
552:
531:
528:
525:
496:
493:
491:
488:
460:
457:
438:nuclear fusion
404:
401:
379:
376:
362:plasmas (i.e.
277:
250:
244:
241:
235:
231:
225:
222:
219:
215:
211:
208:
204:
200:
197:
165:current sheets
147:
144:
93:Ron Giovanelli
75:thermal energy
71:kinetic energy
26:
24:
14:
13:
10:
9:
6:
4:
3:
2:
4641:
4630:
4627:
4625:
4622:
4620:
4617:
4616:
4614:
4605:
4602:
4600:
4597:
4596:
4592:
4588:
4585:
4582:
4579:
4577:
4574:, Space.com,
4573:
4570:
4568:
4564:
4563:0-521-48179-1
4560:
4556:
4552:
4551:
4547:
4530:
4526:
4522:
4516:
4513:
4508:
4504:
4500:
4496:
4492:
4488:
4484:
4480:
4475:
4470:
4466:
4462:
4458:
4451:
4448:
4443:
4439:
4435:
4431:
4427:
4423:
4416:
4409:
4406:
4401:
4397:
4393:
4389:
4385:
4381:
4377:
4373:
4369:
4365:
4357:
4354:
4349:
4345:
4341:
4337:
4333:
4329:
4325:
4321:
4314:
4311:
4306:
4302:
4296:
4293:
4288:
4284:
4280:
4276:
4271:
4266:
4262:
4258:
4254:
4250:
4246:
4239:
4236:
4231:
4227:
4221:
4218:
4213:
4209:
4205:
4201:
4197:
4193:
4188:
4187:10044/1/32763
4183:
4178:
4173:
4169:
4165:
4161:
4157:
4153:
4146:
4143:
4140:
4135:
4132:
4119:
4113:
4110:
4105:
4101:
4096:
4091:
4087:
4083:
4078:
4073:
4069:
4065:
4061:
4054:
4051:
4046:
4042:
4038:
4034:
4030:
4026:
4021:
4016:
4012:
4008:
4001:
3998:
3993:
3989:
3985:
3981:
3977:
3973:
3969:
3965:
3960:
3955:
3952:(4): 043205.
3951:
3947:
3940:
3937:
3932:
3928:
3923:
3918:
3914:
3910:
3906:
3902:
3898:
3891:
3888:
3883:
3879:
3875:
3871:
3867:
3863:
3859:
3852:
3849:
3844:
3840:
3836:
3832:
3828:
3824:
3820:
3816:
3813:(1): 013201.
3812:
3808:
3801:
3798:
3793:
3789:
3785:
3781:
3777:
3773:
3768:
3763:
3759:
3755:
3751:
3745:
3742:
3737:
3733:
3726:
3723:
3717:
3714:
3709:
3705:
3701:
3697:
3693:
3689:
3685:
3678:
3675:
3670:
3666:
3662:
3658:
3654:
3650:
3646:
3642:
3638:
3631:
3628:
3623:
3619:
3615:
3611:
3607:
3603:
3599:
3595:
3588:
3585:
3580:
3576:
3572:
3568:
3564:
3560:
3553:
3550:
3544:
3541:
3536:
3532:
3528:
3524:
3520:
3516:
3509:
3506:
3501:
3497:
3493:
3489:
3485:
3481:
3477:
3473:
3469:
3465:
3464:Solar Physics
3458:
3455:
3450:
3446:
3441:
3436:
3432:
3428:
3424:
3420:
3416:
3409:
3406:
3401:
3397:
3393:
3389:
3385:
3381:
3377:
3373:
3366:
3363:
3357:
3352:
3348:
3344:
3340:
3336:
3332:
3325:
3322:
3317:
3315:0-521-45104-3
3311:
3307:
3300:
3297:
3292:
3290:0-521-45104-3
3286:
3282:
3275:
3272:
3267:
3263:
3259:
3255:
3251:
3244:
3241:
3235:
3232:
3227:
3223:
3219:
3215:
3211:
3207:
3203:
3196:
3193:
3188:
3184:
3179:
3174:
3170:
3166:
3162:
3155:
3152:
3148:
3144:
3138:
3135:
3130:
3126:
3122:
3118:
3114:
3110:
3106:
3102:
3098:
3091:
3088:
3083:
3079:
3075:
3071:
3067:
3063:
3062:Physics Today
3059:
3052:
3049:
3044:
3040:
3035:
3030:
3026:
3022:
3017:
3012:
3008:
3004:
3000:
2993:
2990:
2985:
2981:
2977:
2973:
2969:
2965:
2960:
2955:
2951:
2947:
2943:
2936:
2933:
2928:
2924:
2920:
2916:
2912:
2908:
2904:
2900:
2896:
2892:
2888:
2881:
2878:
2871:
2867:
2864:
2862:
2859:
2857:
2856:Current sheet
2854:
2853:
2849:
2847:
2833:
2830:
2827:
2819:
2815:
2811:
2809:
2806:to propose a
2805:
2801:
2798:
2794:
2789:
2785:
2777:
2775:
2772:
2767:
2765:
2761:
2757:
2753:
2749:
2745:
2741:
2737:
2733:
2729:
2728:magnetosphere
2719:
2717:
2713:
2709:
2701:
2696:
2694:
2692:
2688:
2684:
2680:
2676:
2654:
2650:
2644:
2640:
2632:
2628:
2622:
2618:
2612:
2608:
2600:
2595:
2592:
2588:
2565:
2562:
2558:
2553:
2549:
2537:
2535:
2519:
2515:
2492:
2488:
2467:
2445:
2441:
2436:
2430:
2425:
2421:
2417:
2408:
2398:
2385:
2381:
2374:
2371:
2365:
2360:
2357:
2352:
2347:
2341:
2338:
2332:
2327:
2324:
2319:
2313:
2309:
2306:
2296:
2292:
2289:
2281:
2267:
2254:
2252:
2235:
2232:
2228:
2224:
2221:
2213:
2208:
2204:
2194:
2180:
2176:
2166:
2139:
2128:
2115:
2108:
2103:
2100:
2096:
2090:
2086:
2080:
2077:
2074:
2066:
2052:
2025:
2022:
2019:
1992:
1989:
1986:
1983:
1979:
1968:
1948:
1939:
1926:
1918:
1915:
1905:
1902:
1897:
1891:
1888:
1876:
1865:
1851:
1831:
1823:
1817:
1809:
1807:
1803:
1800:
1794:
1781:
1775:
1772:
1769:
1766:
1762:
1757:
1750:
1746:
1736:
1720:
1718:
1714:
1701:
1693:
1690:
1685:
1681:
1676:
1669:
1664:
1660:
1655:
1649:
1643:
1624:
1604:
1584:
1575:
1562:
1557:
1551:
1547:
1543:
1537:
1534:
1514:
1507:
1502:
1489:
1484:
1481:
1476:
1470:
1465:
1461:
1456:
1451:
1440:
1430:
1424:
1421:
1398:
1395:
1392:
1364:
1360:
1356:
1353:
1350:
1347:
1324:
1316:
1298:
1294:
1284:
1269:
1265:
1261:
1255:
1250:
1246:
1235:
1229:
1220:
1199:
1190:
1175:
1169:
1160:
1156:
1150:
1142:
1138:
1134:
1128:
1119:
1108:
1085:
1064:
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2708:solar flares
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2697:Observations
2691:standard MHD
2541:
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2736:magnetotail
2734:and in the
2679:Hall effect
501:Peter Sweet
135:Peter Sweet
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4613:Categories
4525:Energy.gov
4474:2203.16018
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3016:1603.07062
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2959:2005.02285
2872:References
2802:, led Dr.
2756:ionosphere
2744:Cluster II
1814:See also:
470:separatrix
378:Properties
372:turbulence
119:solar wind
4392:0031-8949
4305:Space.com
4287:206514133
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