Superconducting Magnet Systems

Standard superconducting magnet system features

• Top sample loading and exchange at all temperatures
• Effortless sample rotation and translation about the vertical axis at all temperatures, with options for rotation about a horizontal axis
• Field-independent thermometry
• The SuperVariTemp system, with provision for a temperature control thermometer at the heat exchanger
• Vapor-cooled/superconducting high-current magnet leads
• Superconducting magnets with persistent mode operation providing field stabilities of 20 ppm/h
• Carefully designed magnet support inside the helium reservoir, with optical access through the Dewar vacuum space (OptiMag and SuperOptiMag systems)
• Built-in superconducting liquid helium level sensors, providing continuous or timed level monitoring
• Readily accessible and interchangeable sample chambers

Complete superconducting magnet systems include

• Programmable magnet power supply with computer interface and bi-polar operation
• Temperature controller with field-independent thermometry
• Liquid helium transfer lines
• Cryogenic Hall probe and gaussmeter
• Automatic nitrogen filling mechanism
• Vacuum pumping stations

The renowned Environment by Janis SuperVariTemp insert from Lake Shore operates from 1.5 K to 325 K, and is featured in the SuperVariMag, OptiMag, and SuperOptiMag systems, and is also available as an independent insert for use with existing magnets.

We also offer a variety of superconducting magnet systems that offer a room temperature bore (with inserts that reach 800 K) along with a variety of other systems that are designed for specific applications. These state-of-the-art systems feature integrated designs for the cryostat, magnet, temperature controller, and programmable power supply, together with a complete line of ancillary equipment.

Cryogen-free versions

Available for both optical and non-optical applications, our DryMag™ cryogen-free superconducting magnet systems are offered in both room temperature bore configurations and variable temperature integrated configurations for operation from below 2 K to 300 K. Non-optical systems are also offered with vertical room temperature bore tubes, along with a top-loading cryogen-free cryostat for operation between 1.5 K and 300 K or higher. The magnets are typically cooled through reliable Gifford-McMahon or pulse-tube coolers for lower vibrations. The independent variable-temperature cryostats can also be used separately for ultimate convenience.

Optional measurement system also available for the DryMag™ for these types of measurements:

• Hall voltage
• IV curve
• Resistance (four probe and van der Pauw)
• Magnetoresistance
• Magnetotransport
• Magneto-optical
• Hall coefficient
• Hall mobility
• Anomalous Hall effect (AHE)
• Carrier type/concentration/density

For more information about the various system versions, including specifications and product images, visit the product page on the Lake Shore website.