The g-2 muon storage ring magnet system consists of four large superco
nducting solenoids that are up to 15.1 m in diameter[1,2]. In addition
there is a 1.8 meter long actively shielded inflector dipole that is
to guide the beam into the storage ring. The g-2 superconducting magne
ts will be cooled using forced two-phase helium in tubes that is provi
ded from the J-T circuit of a 625 W refrigerator. The two-phase helium
flows from the refrigerator J-T circuit through a heat exchanger in a
storage dewar that acts as a phase separator and a buffer for helium
returning from the magnets. The g-2 magnet cooling system consists of
three parallel two-phase helium flow circuits that provide cooling to:
the four large superconducting solenoids, the current interconnects b
etween the solenoids with the 5300 A solenoid gas cooled electrical le
ads, and the inflector dipole with its 2850 A gas cooled electrical le
ads.