The operation conditions of Gifford-McMahon (G-M) cryocoolers are limited by the external magnetic field induction. A G-M coldhead with the cooling power of 1.5 W at 4.2 K (RDK-415 by SHI) has been… (More)
A 1.5 T cryogen-free superconducting magnet for a dedicated orthopedic MRI of human extremities was developed and tested. The magnet has a compact cryostat cooled by a pulse tube coldhead with… (More)