On Tue, 22 Sep 2009 13:24:17 -0700 (PDT), Art Unwin
wrote:


Well look at how salvage yards sort out metals into different
enclosures.
They apply a displacement current to a conveyor where each piece of
metal is elevated with spin such that it lands in the appropriate
enclosure which is dependent on the resistivity of the metal elevated.
This isn't exactly how such systems work. Abstractly the system is a
metal detector and a sorting table hanging off a CAN. A controller at
the other end of the CAN 'reads' the discriminator and 'writes' to the
sorter. The writes open and close ejector nozzles. These are the magic
devices that cause the material to 'elevate with spin'.

This method of elevating scrap for recovery has been used for years
and it is the same action that is applied to particles for radiation.
Why would you need a citation for a practice that is well known and in
use?
Because you might be wishing your agenda into how you propose things
work. Who'da thunk that!