PSN-L Email List Message

Subject: Wondermagnet web site additions
From: meredith lamb mlamb1@..........
Date: Fri, 10 Mar 2000 23:32:41 -0800

Hi all,

Forcefield/Wondermagnet has added some more magnets
to their product list, which could be of interest.  See:

For those with a diamagnetic interest (levitation), their item
#16 is especially noteworthy.  Its a 1/4" diameter rod thats
1" long with a thin gold plating and has a R45 or 45 category;
which means it is magnetically enhanced over a typical R30
or R35 neodymium magnet which are much more common.
Frankly; it the best magnet I've ever seen in this type of
experimental application, as I've levitated it in a bored hole
piece of graphite and a more normal "discs" of graphite.
There is one gamble with this magnet in levitation and that is
that when it was originally gaussed, the uniformity can vary
over the length of the magnet; and it can assume a "tilt" or
slope from a horizontal plane of afew degrees (normal) and
on up to some ~ 20 or more degrees.  If you're interested
it maybe prudent to obtain afew and go from there.  This
magnet is also more brittle than a standard magnet, and it
should be handled with care to prevent unintended collision
with other metallic objects.

The magnetization is 1/2 the diameter lengthwise, or, in other
words it floats horizontally in a levitation stand.  (The poles
are not per a normal magnet, with the N on one end and
S on the other).  This magnet would NOT be good for normal
seismographic coil induction, as the field mostly cancels out
because of its pole arrangement.  This magnets magnetic
enhancement significantly aids diamagnetic levitation and much
better stability than a normal production neodymium magnet.

This message is simply a information referral to the item/s on
hand, and I do not share a commercial interest therein.
Common magnet propertys and application interests....yes.

Take care,

Meredith Lamb


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Larry Cochrane <cochrane@..............>