1.5‐GeV Electrons, Positrons To Circulate Soon at Adone

Beam testing in the 1.5‐GeV Adone storage ring for positrons and electrons is expected to begin this year at Frascati Laboratories, run by the Italian Institute of Nuclear Physics (INFN). The ring, expected to store $2×1011$ particles per beam, will be able to deliver a beam to any of four crossing regions that are free for setting up experiments. The ring has a mean radius of 16.7 meters, but the radii of the curved orbit sections (which alternate with straight sections around the circumference) is only 5 meters. Useful aperture will be 22 by 10 cm.