Heavy ion experiments at BNL AGS

The report outlines major experimental results from BNL AGS heavy ion experiments. The AGS provides heavy ion beam with 14.5 GeV/c per nucleon. So far, oxygen silicon beams are accelerated. There are three major counter experiments approved at the AGS, namely E802, E810 and E814. The report addresses mainly on results from E802. First, measurements of neutral energy from O+A collisions by E806 are described. An interesting feature of the data is that edge of the observed energy distribution for O+Au and O+Cu is almost equivalent. The energy produced in the mid-rapidity is almost the same for central O+Au and for central O+Cu collisions. The transverse energy spectra for Si+Pb, Si+Cu and Si+Al are shown and discussed. The tail of the transverse energy for Si+Pb and Si+Cu reactions almost coincides. This result is consistent with the data obtained by the E802 PBGL detector for O+A collisions. The charged particle multiplicity for O+A and Si+A collisions measured by TMA detector of E802 are shown, and the multiplicity distribution is discussed. Pseudo-rapidity distributions of charged particles for central O+Au and Si-Au have also been investigated. E802 has a hadron calorimeter (ZCAL) at 0 degree of the beam line, and the detector is used to measure how much energy is left in the beam fragments. Preliminary results are outlined for Si+Al collisions. (N.K.)