Safe and fast quench recovery of large superconducting solenoids cooled by forced211 two-phase helium flow

摘要

The cryogenic characteristics in energy extraction of the four fifteen-meter-211u001ediameter superconducting solenoids of the g-2 magnet are reported in this paper. 211u001eThe energy extraction tests at full-current and half-current of its operating 211u001evalue were deliberately carried out for the quench analyses and evaluation of the 211u001ecryogenic system. The temperature profiles of each coil mandrel and pressure 211u001eprofiles in its helium cooling tube during the energy extraction are discussed. 211u001eThe low peak temperature and pressure as well as the short recovery time 211u001eindicated the desirable characteristics of the cryogenic system.