Wowee. Right up my alley.

I looked up this design on the wikitube. It's a design called the bitter magnet, named for its inventor (1933), Francis Bitter:

The strongest continuous magnetic fields on Earth have been produced by Bitter magnets. As of 2011 the National High Magnetic Field Laboratory in Tallahassee, Florida, USA, houses the world's strongest resistive magnet. This system has a maximum field strength of 36.2 teslas and consists of hundreds of separate Bitter plates. The system consumes 19.6 megawatts of electric power and requires about 139 litres of water pumped through it per second for cooling.[2]. This magnet is mainly used for material science experimentation. For similarly designed examples of bitter coils see the external links below. The strongest continuous manmade magnetic field, 45 T, was produced by a device consisting of a Bitter magnet inside a superconducting magnet.[1]