Fabrication and testing of the 3-m diameter superconducting solenoid and refrigeration system for the Fermilab Collider Detector

A large, 1.5-T conduction cooled superconducting solenoid for the Collider Detector at Fermilab was designed and built as part of a US-Japan international high-energy physics collaboration. Initial tests of the coil without its iron return yoke indicated that the coil performed as designed and should operate in a very stable manner when installed in the flux return iron at Fermilab. The refrigeration system for the solenoid has been installed and operated with a dummy load. The nominal 600-W capacity of the system was achieved in the initial test.