Michael Mozina has been denying the magnetic reconnection in
Dungey's paper. Here is Dungey's Figure 1, rotated 90 degrees counterclockwise:
Here is Wikipedia's picture of magnetic reconnection
WP (which is in the public domain, and is being served from my web site):
Wikipedia's
animation of that image shows why this phenomenon is known as magnetic reconnection. The red and blue lines correspond to the long curved lines of Dungey's Figure 1; they are magnetic field lines. The dotted lines that cross at the center of Wikipedia's image represent the boundaries between magnetic domains; those boundaries correspond to the long straight lines of Dungey's Figure 1. The central point, where those boundaries cross, is the neutral point
N of Dungey's paper.
The lines of force are perpendicular to the magnetic field lines; in Dungey's Figure 1, the lines of force are illustrated by the short arrows that are labelled
f; those lines of force do not appear in Wikipedia's images.
As the
magnetic field changes over time, the magnetic field lines in the north and south quadrants flow toward the center of the image, where each magnetic field line appears to split into two halves and join up with the corresponding half of the magnetic field line approaching from the opposite direction. These new magnetic field lines then appear to move west and east, away from the center of the image.
Wikipedia's animation makes this beautifully clear.
Just two days ago,
I explained what is meant by magnetic reconnection, taking special care to refute the claim that, being a mathematical abstraction, magnetic reconnection has no physical meaning.
Dungey gave us a very specific physical meaning however as he bridged the gap between discharge theory and 'reconnection' theory. He makes it *VERY* clear that what "reconnects" are the plasma discharges/pinches at the *ELECTRO*magnetic null point. It's the kinetic energy of the PARTICLES and INDUCTION (AKA the transfer of kinetic energy from the magnetic field to a charged particle).
No. A physical situation similar to the one shown in the pictures above and in the animation can be created by time-varying electrical currents running in four symmetrically placed wires that run perpendicular to and outside the images. As Dungey himself notes, there needn't be any current at the neutral point
N:
Dungey said:
The limiting lines of force through N form an X and would be perpendicular, if there were no current flowing in the z-direction (normal to the paper).
Note, however, that the highlighted phrase is incorrect; Dungey is referring to the boundary lines, which are asymptotic to the magnetic field lines, not to the lines of force.
No magnetic lines "disconnect" or "reconnect', just "discharges' and "current streams" of charges particles. No magnetic lines ever "reconnect".
As
I have explained, the visual impression created by
Wikipedia's animation corresponds to a mathematical characterization in which magnetic field lines of the time-varying magnetic field approach the boundary lines from above and below and vanish as they meet the boundary lines; at the instant a pair of magnetic field lines vanish, another pair of magnetic field lines emerges from the boundary travelling east and west.
This mathematical account of what's happening doesn't just agree with what we see in the animation; it also agrees with the physical reality described by Maxwell's equations. The magnetic reconnection is just as real as the magnetic field lines, which are just as real as the magnetic field.
Alfven was essentially correct. MR theory will forever be a form of "pseudoscience", because it's "pseudo-correct". It's mathematically correct, as were all the MR papers Alfven ever read. It's just physically mislabeled in terms of the actual *PHYSICAL* process. The process is *INDUCTION* and *PARTICLE COLLISION*. The null is simply experiencing a "discharge' through the double layer. Alfven describes this process in terms of an exploding double layer and automatically and forcefully disqualifies MR theory in any current carrying plasma scenario.
That can't possibly be right, because we can generate the time-varying magnetic fields and accompanying magnetic reconnection shown in the images and animation using nothing more than four conventional wires running perpendicular to and outside the images: no particles at all within the space shown by the images, hence no particle collisions, no discharges, and no double layers, exploding or otherwise.
Apart from you, no one has claimed that magnetic reconnection involves "exotic energy transfers".
Well, particle collisions have a proper scientific name. Induction has a proper scientific name when we're talking about transferring magnetic field energy into charged particles. Evidently you've already RULED OUT these other mundane options in favor of something "exotic" (not induction). Why?
Because you are lying about what I have written?
Apart from you, no one has claimed that magnetic reconnection involves "exotic energy transfers".
The magnetic field topology changes only because the current flow topology changes over time. There's nothing "mystical" going on here. At the level of "physics", it's the "particles" and what Alfven calls "circuits" that 'reconnect" at the *ELECTRO*magnetic null point.
As Dungey noted, there needn't be any particles or current at his neutral point
N. The magnetic fields that give rise to the magnetic field lines shown in
Wikipedia's animation can be generated by running time-varying currents through conventional wires outside the field of view. Conclusion: Your explanation can't possibly be correct.
Maybe you should listen to people who actually understand this stuff, like
tusenfem:
When can I expect my idiot explanation about how your circuit reconnection can explain the MRx signatures that were measured by Cluster as shown in the Runov et al paper (if you don't have access to the paper, just say so, I am co author, and have the pdf)