A test of a superconducting solenoid for the mucool RF experiment

This report describes the results of a series of tests of a 440-mm warm bor e split solenoid used for testing 805 MMz RF cavities, The solenoid consist s of two coils each 250-mm long separated by a gap of 140 mm. The solenoid was designed to operate in two modes; a solenoid mode with the two coils ho oked in the same polarity and a gradient mode with the two coils hooked in opposite polarity. In the solenoid mode, the magnet is designed to produce an induction of 5 T over a region that is about 400 mm long. In the gradien t mode, the solenoid produces a field gradient of 25 T per meter along the asis over a distance of about 300-mm. The solenoid was designed to carry a force of over 3 MN that pushes the two coils apart, when the magnet is oper ated in the gradient mode. In order to carry this force, the coils are enca sed within aluminum shells, both inside and outside. Since this solenoid is encased in aluminum and the coils are potted, training was observed. The m agnet training history and magnet field measurements are presented in this report.