| Model | Sample environment | Operating temperature | Magnetic field | Optical access |
| Cryogen-free systems |
| DryMag™ | Vacuum/UHV or exchange gas | 1.5 K to 700 K | 0 to 12 T | Yes |
| He-4 systems |
| SuperVariMag | Flowing helium vapor or vacuum/UHV | 1.5 K to 325 K (options to 400 K) | 6 to 12 T | No |
| OptiMag | Flowing helium vapor or vacuum/UHV | 1.5 K to 325 K | 6 to 12 T | Yes |
| SuperOptiMag | Flowing helium vapor or vacuum/UHV | 1.5 K to 325 K | 7 T | Yes |
| Room temperature systems |
| Room temperature bore | Atmospheric pressure or vacuum/UHV | 300 K | 6 to 12 T | Yes |
| Special systems |
| Microscopy | Vacuum/UHV | 3.5 K to 450 K | 0 to 7 T | Yes |
*Room temperature bore systems can be combined with variable temperature cryostats to operate in temperature ranges between 1.5 K and 800 K.
With over four decades of experience and a worldwide installation base, we are a recognized leader in the design and manufacture of superconducting magnet systems. Our renowned SuperVariTemp insert 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. Our approach to superconducting magnet system design provides a variety of technical and cost benefits.
By maintaining flexibility over the specification and integration of the magnet, electronics, temperature controller, and cryostat, we are able to offer magnet systems with performance characteristics tailored to individual experimental and budgetary
requirements.
Our staff of physicists and engineers has extensive experience in the design and operation of superconducting magnet systems and are uniquely qualified to assist you with every step of your system purchase, from experimental design to post-installation
support. All systems are fully integrated and liquid helium tested at our Woburn, Massachusetts facility; installation, start-up, and training are available.
Let us know what you need
This magnet requirements questionnaire contains
several questions that will help our engineers determine the best system for your requirements. Please take a moment to fill it out and email it back to sales@lakeshore.com
The Lake Shore SuperVariTemp (SVT) cryostat is a key component
of all SuperVariMag, OptiMag,
and SuperOptiMag superconducting magnet systems. By controlling the temperature of the flowing helium
vapor in which samples are immersed, the SVT allows for precise monitoring and control of sample temperature over a 1.5 to 325 K range while eliminating the need for thermal anchoring and sample mount heating. The helium flow rate and heater
are balanced to provide operation over the range of 4.2 K to 325 K; automatic temperature controllers equipped
with field-independent thermometers provide accurate and precise temperature control.
The SVT cryostat allows full use of the cooling power of escaping helium vapor as it exits the sample chamber. The superconducting magnet system sample chamber is thermally isolated from the helium reservoir by the Dewar vacuum, thereby eliminating heat
conduction into the reservoir. Precise sample temperature is measured using a thermometer attached to the sample holder. Operation to 1.5 K is made possible by immersing the sample in liquid helium and reducing the pressure with a mechanical
vacuum pump. The SVT's unique design also allows sample cooling in flowing helium vapor to approximately 2 K for extended operation below 4.2 K without the need to monitor or replenish the helium level in the sample chamber. For optical
experiments, this presents the least interference to the incoming and scattered beams.
The SVT insert is available as an accessory for existing superconducting magnets. A custom-designed SVT cryostat can be matched to the dimensions of an existing open-neck Dewar and magnet bore. Drawing liquid helium from the main magnet reservoir, the
SVT insert will provide temperatures of 1.5 K to 325 K without the need for pumping on the main reservoir.
A superconducting magnet insert is also available in a high-stability or a high-temperature static gas insert option for applications requiring a high-stability region and continuous operation above 100 K for high-sensitivity experiments that preclude
locating the sample in flowing helium vapor. Special sample positioners can also be supplied for temperatures of 400 K or higher, along with optional wiring and cold, detachable wiring stages.
What is a superconducting magnet used for?
This type of magnet is used as part of a measurement platform for characterizing samples as a function of magnetic field as well as variable temperature.