Beam vacuum chambers for Brookhaven´s muon storage ring

An experiment is being built at Brookhaven to measure the g-2 value of the muons to an accuracy of 0.35 ppm. The muon storage ring of this experiment is designed to produce a dipole field with homogeneity to 1 ppm using a continuous superconducting magnet. The beam vacuum system in the storage ring will operate at 10^-7 Torr and consists of twelve sector chambers. The chambers are constructed of aluminum and are approximately 3.5 m in length with a rectangular cross-section of 16.5 cm high by 45 cm at the widest point. The design features, fabrication techniques and cleaning methods for these chambers are described. Monte Carlo simulation of the pressure distribution and finite element analysis of the chamber deflection are summarized with good correlation shown to measured values obtained during tests of the prototype chamber