Application of a superconducting solenoid for the SIN stopped μ channel project

Muon channels have been bui lt and successfully operated at synchrocyclotrons for many years. The classical method, which was first adopted by CERN¹, is to use a long series of alternating focussing auadrupole lenses (quadrupole channel). Presently with the advent of high intensity meson production machines, design work on muon channels has again started at several laboratories^{2 - 4} . We report on the status of a superconducting solenoid channel, which is being designed for the SIN meson factory at Zurich. The experimental method and the design are described and results of extensiv calculations on the channel performance are presented and compared with those for a quadrupole channel.