Optimized designs combined with new technology allow higher fields and operation that is more efficient. Some applications utilize cryogen-free technology, which eliminates the need for liquid cryogens. These systems operate on standard 3-phase power drawing a small fraction of the current needed for resistive magnets. The superconducting magnet is constructed such that high fields are contained within the structure. These systems are more compact and weigh a fraction of the older technology systems.
Higher fields are possible.
The superconducting magnet is designed for a fast charge and discharge rate so time between back flushes is minimized. Bore sizes typically are between 5cm and 12.5cm. Systems are designed and built such that if the matrix is removed from the magnetic field while the superconducting magnet is energized, the system will be able to withstand the forces generated by the moving matrix without quenching. It is common to have a maintenance free refrigerator system installed on the cryostat to maintain low liquid helium consumption and to minimize cryogen refill procedures. Using a closed-cycle refrigerator configuration eliminates the need for liquid nitrogen and thereby significantly reduces the maintenance requirements of the cryostat.