tusenfem
Illuminator
- Joined
- May 27, 2008
- Messages
- 3,306
And yet if this 'reconnection' is taking place inside of a current carrying plasma, it's not simply magnetic lines doing the connecting, and Alfven's "particle" (actually not Alfven's orientation, he cited the relevant first authors) or circuit orientation of double layer energy transfers apply. In fact he claimed that the existence of a double layer inside that reconnection region put another nail in the reconnection coffin.
This all comes right back to kinetic energy and kinetic energy transfer between *PARTICLES*. The transfer of photon kinetic energy transfer of the stored magnetic field energy into charged particles is called "induction". The kinetic energy transfer between particles inside the double layer has nothing to do with magnetic lines "disconnecting' or "reconnecting'. If those "lines" are merely current carrying filaments, it's just as valid to treat it as a "circuit", and look at it in terms of "circuit energy".
And when exactly are you going to explain the observations by e.g. Runov et al. (the paper I quoted) with a set of circuits, how is the circuit going to accelerate the plasma in a direction perpendicular to the magnetic field direction, etc etc.
Assume that I am a stupid idiot and need to be explained the basics of this circuit reconnection, because Carlqvist does not describe this it just discusses how twisted magnetic fields can be unwound with a double layer. And then, of course there is the strong doubt by Alfvén that MRx might be true anyway, to quote from his 1973 JGR paper:
HA said:In case the magnetic field varies with time, the geometry near neutral points may change in such a way that it is legitimate to speak of a 'field-line reconnection.' We cannot exclude the possibility that some of the field-line reconnection formalism may be applicable, but this remains to be proved. In fact, of the most conspicuous nonstationary phenomena, magnetic substorms are explained by current disruption (survey by Boström [1974]).
and indeed, all the observations made these days in-situ show exactly what the mathematical models predicted, and with the upcoming MMS mission, there will be an electron scale view of MRx, which we have not been able to observe in nature.