General purpose toroidal detector

In connection with a proposed search for muons and muon pairs at the ISABELLE storage rings, a preliminary design has been made for a superconducting toroidal magnet. The purpose of a magnet at a colliding beam facility is to measure the momentum of charged particles by their bending in the magnetic field. As the momenta of particles produced in the next generation of colliding beams (proton-antiproton, electron-positron, electron-proton, as well as proton-proton) will be in the range 10 to 100 GeV/c, the highest magnetic fields are required. In addition, as the processes of greatest interest (for example, the production of the intermediate bosons, W+- and Z0) are expected to be extremely rare, detectors must have a large acceptance (centered at 900 to the colliding beams but extending down to angles of 300 to each beam). Thus the magnetic field must extend over a large volume. Toroidal magnets when used at colliding beam facilities have advantages which are discussed