Award winning integrated cryogen free superconducting magnets and dilution refrigerators provide combined B/T environments, cooled by a single PTR
Our in-house manufacturing of both magnets and refrigerators enable us to offer unique service and support capabilities of all aspects of the system.
A wide range of solenoid magnets, ranging from 0.3 T to 18 T and a variety of multi-axis vector magnets and split-pairs with optical access, is available. Demountable current leads (as opposed to soldered) are available on request for the majority of magnets.
Our HTS current leads with a brass top section (as opposed to copper), reduce the heat load resulting from radiation and wiring services to the 4 K stage from 60 K.
Oxford Instruments is the only single source supplier, offering guaranteed integrated cryogen free magnet and dilution refrigerator performance with such an extended range:
A cancellation coil which creates an actively shielded region (typically < 100 Gauss) around the mixing chamber plate is available for most solenoid magnets. This option results in a longer system cool down time but may be essential for experiments with magnetically sensitive components mounted on the mixing chamber plate. It also reduces eddy current heating, which makes it attractive for sweeping field experiments.
Magnet power supply
The new Oxford Instruments Mercury IPS builds on the success of our established power supply technology with a much improved user interface and added modularity. A 60 A master unit with a touch screen interface is combined with one or more 60 A slave units to provide higher currents and multiple outputs for 2 and 3 axis vector magnets. Built-in functionality for persistence mode control, quench protection and remote control via USB, TCP/IP, GPIB and serial ports, are some of the key features.
This image illustrates the integrated magnet warming and cooling during 5 T field sweep, hold at field and sweep back to 0 T (sweep rate 0.31 T/min). Local eddy current heating at the mixing chamber is also shown during field sweep, with time to recover back to base temperature being around 1 hour. 3 microwatt cooling power is available at 20 mK.