Plane or Tapered Poles
or Water Cooled
or Wall Mounting
50mm Square Poles
alignment of small components
chemical reaction rate changes
3470 Electromagnet is the smallest and lightest
standard dipole electromagnet available from GMW.
It is used in a wide range of teaching, research and industrial
applications where a relatively small volume of field
is required. The light weight allows it to be used
on optical tables and the simple poles enable axial entry
& exit holes to be matched to the optical geometry.
The electromagnet has two 45mm (1 ¾ inch) diameter
cylindrical pole pieces. One end of each pole piece has
a plane cylindrical 40mm pole face and the other end has
a tapered 20mm pole face. The 40mm pole face produces
the most uniform field. The tapered 20mm pole faces are
used when higher gap fields are needed. Each pole piece
is clamped in the yoke by a bolt. The pole pieces are
adjusted to vary the gap by slackening the clamping bolts.
The same procedure is used to remove or reverse the pole
pieces. The gap is adjusted in the range from 0 to 75mm.
Optional square poles (50mm side) are available. (The
square poles have been applied in a simple mass spectrometer
as described in "Undergraduate Mass Spectrometer",
John W. Dewdey, American Journal of Physics, 28
The two coils are wound on spools, which have integral,
electrically isolated, water cooling tubes and overtemperature
interlock switches. Operation with water cooling allows
a maximum coil current of 6A. Regular tap water may be
used. Without water cooling, the maximum operating current
is 3.5A. The coil-to-coil spacing is adjustable over the
range from 35 to 75 mm.
Variation and Customizations
- 3470HFAC High Frequency AC Magnet. Fields to ±70MT with frequency from dc to 25kHz
- 3470-ET “Extended Throat” has a 165mm deep throat [from center of pole face to yoke cross-bar] sized to apply field to the center of a 300mm wafer.
- Custom Yoke geometries (e.g. extended air-gap)
- Custom poles optimized for field uniformity, physical access to sample, and optical access to sample.