--- Robin van Spaandonk <[EMAIL PROTECTED]> wrote: > In reply to Paul's message of Wed, 11 Oct 2006 > 22:24:45 -0700 > (PDT): > Hi Paul, > [snip] > >Furthermore, most of the radiation would internally > >reflect off the cores outer walls. > > If the core is solid metal, then I doubt the > radiation would ever > make it to the outer walls. It would all be absorbed > by the free > electrons in the metal.
Hi Robin, If the metal has poor electrical resistance then sure. Metals are generally good reflectors. To understand how this works one needs to understand wave mechanics. Reflectance occurs during changes in effective refractive index. Free electrons give metals high effective refractive index. Since the magnetic field _originates_ within the metal it will traverse at a slower rate. The rate of absorption depends on the metal. > However this may not be a bad thing. A > normal radio antenna is also made of metal, and when > it intercepts > radio waves it just results in an oscillating > current in the > metal, particularly if the antenna is tuned to the > frequency of > the waves. Yes, but in that case the field is traversing from air to metal. In magnetic material the field originates within the dense material. [snip] > >Here's a list of methods to decrease the > >magnetic materials ability to absorb the radiation > in > >addition to increasing the potential radiation. > > It might be easier to just let it "absorb" the > radiation (see > above). > [snip] > >3. High saturation materials. A fully saturated > core > >prevents the intrinsic electron spins from > absorbing > >the magnetocaloric energy. > > You don't really need to worry about this, because > the energy > isn't lost, even when it is absorbed by bound > electrons. It is > just delays the output "temporarily". The trick is > to include > rectification in the external circuit, so that there > is a net flow > of power out of the core. (Once it has been > converted into DC > there is no way it can reenter the core). In method #1 that's idea-- allow Eddy currents to collect a significant part of MCE energy and then collect as much Eddy current energy as possible. Regards, Paul Lowrance __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
