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C-Mag Cryogen-FREE Superconducting Magnet System
The C-Mag is a cryogen-free, 4.2K cryocooler-based turn-key superconducting magnet system for materials characterization. It offers accurate control of sample temperature from 1.5K to 325K with a simultaneous magnetic field control, a 49 mm sample space, and standard solenoid, split-pair, and multi-axis configurations up to 14T.
Cryomagnetics' C-Mag Cryogen-FREE magnet systems are versatile property measurement systems that provide the researcher with exceptional range, versatility, accuracy, and automation in materials characterization. Based on the latest cryocooler refrigeration technology, the systems are very easy to set up, operate and maintain. Accurate control of sample temperature from 1.5K to 325K is provided with simultaneous control of applied magnetic field. Vibration-isolated configurations extend the platform to nanostructure research and other vibration-sensitive measurements that demand a highly stable sample environment.
Core Features
4.2K Cryocooler Based
A choice of Pulse Tube or Gifford McMahon configurations eliminate liquid cryogens for the superconducting magnet and are used to condense a small volume of LHe for sample cooling from a closed volume of gas. This allows sample-in-vapor operation from 1.5K-325K in continuous flow operation.Turn-Key System
Superconducting magnet, 4.2K cryocooler system, superconducting magnet power supply, temperature controller, thermometry (gold-plated OFHC copper sample mount with heater and calibrated sensor), and standard as well as custom sample mounts.Ease of Use
Simple sample exchange process allows user to change samples without warming magnet or cryocooler.Ultra-Low Vibration Options
Mechanically decoupled platform available, featuring pneumatically dampened supports, edge-welded vibration isolation bellows, and ultra-flexible thermal straps that decouple the cryocooler from the magnet and sample. A vibration-isolation base stand — compatible with the ultra-low-vibration mounting legs used in high-resolution NMR — reduces floor-vibration transmission, with a remotely-mounted cold head motor available for further isolation. For probe microscopy, an optional pneumatically dampened anti-vibration sample rod platform mounts via standard KF fitting and links to the magnet cryostat through a supple edge-welded bellows assembly. Ideal for AFM or other vibration sensitive measurements.Variable Temperature Insert (VTI)
A top-loading VTI integrated into the cryostat/cryocooler assembly provides variable-temperature access to the high-field region. Circulating helium gas is condensed to liquid He4 to cool the magnet and VTI; a JT expansion valve then cools the sample space, with no helium refill required after the initial charge. The insert is upgradeable to extend the system's low-temperature range.Flexible Configurations with Customized Options Available by Quote
49 mm and Optional 61mm Sample Space Configurations, or a He3 insert (25mm usable diameter) for extended low-temperature operation to <350mK or lower, depending on configuration.
Optical Access X/Y/Z with Optional Optics Available
Horizontal and bottom-mounted window placements, with interchangeable quartz windows to match wavelength requirements.Gas Handling Systems
Closed loop operation of gaseous helium only for temperature control, using a vacuum pump, compressor, helium gas expansion chamber, and all necessary valves, gauges, and plumbing.Modular, Serviceable Construction
O-ring-sealed, modular vacuum casing and thermal shield allow service and modification without cutting into the system.Upgrade Paths Including He3 and Applied Analysis Probes Available
Standard Configurations
Solenoids: Vari-9 (9T), Vari-12 (12T), Vari-14 (14T)
Split Pair: Vari-7S (7T)
2-Axis: Vari-7/2, Vari-8/2, Vari-9/1
3-Axis: Vari-1/1/1, Vari-5/1/1, Vari-7/1/1, Vari-9/2/2