Cryogen Free Magnet Systems

 

Scientific Magnetics manufactures a cryogen free magnet system generating a field of 9 tesla and a sample temperature range of 2 K -300 K. The system is cooled by a single two-stage, 1 W Gifford McMahon cryocooler. The magnet is fitted with a persistent mode switch and can be swept at up to 1 T/min.
The system cool down time from room temperature to 4.2 K is less than 24 hours.

A complex cryogen free magnet system for use in a plasma drive. The Variable Input Specific Impulse Magnetoplasma Rocket (VASIMR) system encompasses three linked magnetic cells; the Plasma source, RF Booster and Magnetic Nozzle.

Scientific Magnetics has designed and manufactured two double ADR magnet systems for the Mullard Space Science Laboratory. The magnets consist of two sets of actively shielded coils, each producing 3 Tesla. These magnet systems operate completely cryogen free. To minimise the heat load on the cryocooler, they are wound with ultra-fine (0.1 mm diameter) conductor which permits an operating current of less than 2.3 Amps for 3 tesla.

This pair of cryogen-free HTS magnets, independently powered and cooled, allows precise profiling of the magnetic field within an electron cyclotron resonance (ECR) source. The magnets are entirely cryogen-free, operating at 23 K and provide a maximum field on the axis of 1.8 T.