BeAChooser
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Part 5 - A Little More Concerning Magnetic Reconnection ... That Bulwark Of Mainstream Astrophysics
As I mentioned in Part 2, the mainstream uses *magnetic reconnection* as an explanation of Solar Corona temperatures. Some claim that lab experiments have proven magnetic reconnection of the type envisioned in extraterrestrial phenomena is real. Not true.
http://farside.ph.utexas.edu/teaching/plasma/380.pdf "Introduction to Plasma Physics: ... snip ... The Sweet-Parker reconnection ansatz is undoubtedly correct. It has been simulated numerically innumerable times, and was recently confirmed experimentally in the Magnetic Reconnection Experiment (MRX) operated by Princeton Plasma Physics Laboratory. 37 The problem is that Sweet-Parker reconnection takes place far too slowly to account for many reconnection processes which are thought to take place in the solar system. For instance, in solar flares S ? 10^^8, VA ? 100 kms^^?1, and L ? 10^^4 km. According to the Sweet-Parker model, magnetic energy is released to the plasma via reconnection on a typical time-scale of a few tens of days. In reality, the energy is released in a few minutes to an hour. Clearly, we can only hope to account for solar flares using a reconnection mechanism which operates far faster than the Sweet-Parker mechanism. One, admittedly rather controversial, resolution of this problem was suggested by Petschek. ... snip ... It must be pointed out that the Petschek model is very controversial. Many physicists think that it is completely wrong, and that the maximum rate of magnetic reconnection allowed by MHD is that predicted by the Sweet-Parker model. In particular, Biskamp wrote an influential and widely quoted paper reporting the results of a numerical experiment which appeared to disprove the Petschek model. ... snip ... Probably the most powerful argument against the validity of the Petschek model is the fact that, more than 30 years after it was first proposed, nobody has ever managed to simulate Petschek reconnection numerically (except by artificially increasing the resistivity in the reconnecting region—which is not a legitimate approach)."
As I mentioned in Part 2, the mainstream uses *magnetic reconnection* as an explanation of Solar Corona temperatures. Some claim that lab experiments have proven magnetic reconnection of the type envisioned in extraterrestrial phenomena is real. Not true.
http://farside.ph.utexas.edu/teaching/plasma/380.pdf "Introduction to Plasma Physics: ... snip ... The Sweet-Parker reconnection ansatz is undoubtedly correct. It has been simulated numerically innumerable times, and was recently confirmed experimentally in the Magnetic Reconnection Experiment (MRX) operated by Princeton Plasma Physics Laboratory. 37 The problem is that Sweet-Parker reconnection takes place far too slowly to account for many reconnection processes which are thought to take place in the solar system. For instance, in solar flares S ? 10^^8, VA ? 100 kms^^?1, and L ? 10^^4 km. According to the Sweet-Parker model, magnetic energy is released to the plasma via reconnection on a typical time-scale of a few tens of days. In reality, the energy is released in a few minutes to an hour. Clearly, we can only hope to account for solar flares using a reconnection mechanism which operates far faster than the Sweet-Parker mechanism. One, admittedly rather controversial, resolution of this problem was suggested by Petschek. ... snip ... It must be pointed out that the Petschek model is very controversial. Many physicists think that it is completely wrong, and that the maximum rate of magnetic reconnection allowed by MHD is that predicted by the Sweet-Parker model. In particular, Biskamp wrote an influential and widely quoted paper reporting the results of a numerical experiment which appeared to disprove the Petschek model. ... snip ... Probably the most powerful argument against the validity of the Petschek model is the fact that, more than 30 years after it was first proposed, nobody has ever managed to simulate Petschek reconnection numerically (except by artificially increasing the resistivity in the reconnecting region—which is not a legitimate approach)."
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