The AGS-booster lattice

The interests of both particle and nuclear physicists are converging on the AGS; this machine is almost ideally and uniquely suited to perform a new class of frontier experiments. Particle physicists would like to study the extremely heavy (multi-TeV) particles posited by new theories by searching for rare K-decays. Nuclear physicists want to create the extremely dense form of nuclear matter which exists within neutron stars by studying heavy ion collisions. Particle physicists interested in spin physics would like to study polarized proton scattering in the very high momentum transfer region, which requires a higher intensity polarized proton flux. The ability of the AGS to simultaneously fulfill all these requirements can be addressed by the construction of a Booster synchrotron. With the addition of the Booster, the enhanced AGS will possess capabilities not available anywhere else in the world. The AGS Booster has three objectives. They are to increase the space charge limit of the AGS, to increase the intensity of the polarized proton beam by accumulating many linac pulses (since the intensity is limited by the polarized ion source), and to reaccelerate heavy ions from the BNL Tandem Van de Graaff before injection into the AGS. The machine is capable of accelerating protons at 7.5 Hertz from 200 MeV to 1.5 GeV or to lower final energies at faster repetition rates. The machine will also be able to accelerate heavy ions from as low as 1 MeV/nucleon to a magnetic rigidity as high as 17.6 Tesla-meters with a one second repetition rate. As an accumulator for polarized protons, the booster should be able to store the protons at 200 MeV for several seconds. The construction project started in FY 1985 and is expected to be completed in 1989. The purpose of this paper is to provide a future reference for the AGS Booster