Proton-Synchrotron assembly of the superconducting quadrupole

Construction of the prototype superconducting quadrupole nearing completion. Iron rings were being fitted around the windings and liquid-helium cooling channels.. At this stage the central stainless steel bore has been surrounded by insulation, the superconductor has been wound on in quadrupole form, the structure to allow helium cooling channels is in place and the surrounding iron is being clamped around.