Estimates of the neutron fluence for the SDC detector

Abstract

The high energy and high luminosity of SSC cause radiation problems to detectors. Almost all the radiation in the SDC detector comes from the 20 TeV on 20 Tev pp collisions. The design luminosity corresponds to 10[sup 8] collisions per second. This luminosity is maintained for 10[sup 7] seconds (one SSC year). It is important to know the radiation fields experienced by the tracking volume, calorimeter, electronics and the phototubes. The loss of light due to the radiation damage to the scintillators can adversely affect the physics performance of the calorimeter. Studies have been carried out earlier to estimate the radiation dose in the SDC detector. In this note we use ISAJET in combination with CALOR89 to make an accurate prediction of neutron fluence at the various locations of the SDC detector. The low energy neutron fluence is important because of their large activation cross sections. In CALOR89 the low energy neutron fluence is accurately estimated by MORSE code.