2 SUPERCONDUCTING STORAGE-RINGS - ISABELLE

At Brookhaven National Laboratory on Long Island the Department of Energy has under construction a high-energy, proton-proton colliding beam research facility called ISABELLE. Located in the northwest corner of the existing Brookhaven site (Fig. 1), two rings of magnets are contained within a common tunnel more than two miles in circumference. These two rings of magnets carry beams in opposite rotations, crisscrossing at six positions around the periphery. At these locations, head-on collisions occur between the proton beams, leading to center-of-mass energies up to 800 GeV. This paper summarizes the general features of the design and the status of the project at the present time. It brings up to date the results reported at the National Particle Accelerator Conference in March 1977. The most significant change since that time has been an upgrading of the energy of the overall facility, and acceptance of the project by the Department of Energy. © 1979 IEEE