Electromagnet Systems

All Walker Scientific standard electromagnets are of the proven "H" frame, designed to provide superior homogeneity over a wide field range. With the use of our foil wound, water cooled coils, which have proven to produce the highest magnetic field per kilowatt, as compared with other methods of coil construction, we are able to provide extremely high fields at a moderate cost.

Our method of coil construction achieves a 40% greater fill factor over other methods of coil construction which results in greater accessibility to the working gap. It also enables more ampere turns to be condensed into a smaller volume nearer the magnet poles for minimized stray fields resulting in the highest magnetic field per kilowatt of power per cubic inch of coil volume for a given coil construction.

Our line of variable gap electromagnets offer added versatility while still offering the highest degree of rigidity for maximizing homogeneity.

Cast magnet iron frames are used in all of our variable gap electromagnets to enable us to provide the most uniform and field efficient variable gap electromagnets on the market by putting the iron where it is most needed.

The entire magnet yoke is cast from pure magnet iron of the same melt and the pole bores are finished by jig boring to insure precise alignment of the moving poles. In addition, a ramp locking mechanism is built into each movable pole to firmly lock each pole in position during operation so as to achieve fixed gap magnet performance.

All magnets are factory aligned and tested to specified field levels and homogeneity prior to shipment using NMR (Nuclear Magnetic Resonance) techniques where possible.


Applications:

• Magnetic hysteresis studies
• Magnetic susceptibility measurements
• Hall effect studies
• Magneto-optics experiments
• NMR (Nuclear Magnetic Resonance) studies
• EPR (Electron Paramagnetic Resonance) studies
• Quantum mechanics analysis
• Biological studies

Features:

• Proven "H" frame construction for high inherent homogeneity over a wide field range
• High efficiency tape wound coils for highest magnetic field per kilowatt input
• Pure magnet iron cast frames for all variable gap electromagnets
• Jig bored pole bores insure precise pole alignment for all variable gap electromagnets
• Positive ramp locking for all variable gap electromagnets
• NMR alignment, where possible for all electromagnets
• A wide selection of associated current and field regulated power supplies are also available

Specifications:

Note: The air gap for fixed electromagnets can be varied by interchanging pole caps.

The maximum air gap range for fixed gap electromagnets is based on using standard pole caps. Thinner pole caps can be provided on special order.

• Accessories for Laboratory Electromagnets

• Related Articles: “How to Select a Magnet System”

Ask an Applications Expert about any of these products

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