Halbach Array
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What is a Halbach array?
A Halbach array is a special arrangement of permanent magnets which increases the
magnetic field on one side of the device while cancelling the field to near zero on the
other side. It is the closest you can get to a one-pole/monopole magnet. In the diagram
below, the magnetic field is enhanced on the bottom side and cancelled on the top side
(a one-sided flux).
The pattern (on the front face; left, up, right, down) of permanent magnets can be
continued indefinitely and have the same effect. It is roughly similar to many horseshoe
magnets placed adjacent to each other, with alternating polarity. The effect was
discovered by Mallinson in 1973, and these 'one-sided flux' structures were initially
described by him as a 'curiosity', although he recognised at the time the potential for
significant improvements in magnetic tape technology. In the 1980s, the late Klaus
Halbach, a physicist at Lawrence Berkeley National Laboratory, invented the Halbach array
to focus accelerator particle beams.
The halbach array
Magnetic field viewer (note: fields are mainly to right)
unassembled kit
The kit includes:
- Aluminium magnet case (8mm x 37.5mm x 12mm)
- 5 very strong rare earth magnets (cube shaped)
- 5 grub screws to hold magnets in place (in some cases a spare maybe provided)
- Alan key to tighten grub screws
- Magnetic field viewer card
- Instructions
Note: We have made these kits to be as simple to assemble as possible. It is much easier/stronger than gluing magnets. But assembly still requires a person with good dexterity . Be careful as the magnets are strong and can pinch the skin or fly away from one another.
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 Download the manual
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(click on the images above to view movie)
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We ship worldwide
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Ideal for ages 11+ suggested.
To compare by age group
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