AN e+e- TOP FACTORY IN A 50 + 50 TeV HADRON COLLIDER TUNNEL

We present the parameters of an e+e- collider sized for the tunnel of a 50 + 50 TeV superfemc hadron collider[l]. Assuming a diameter of 170 km and a maximum radiated power of 100 MW, this collider should have a maximum energy of 500 - 600 GeV (c.m.) and should be able to produce a luminosity L = 0.9.1033 cm-2sec-1 at a center of mass energy of 360 GeV, (somewhat less at higher or lower energies) which would make it useful for producing top quarks or light Higgs bosons. Design problems include the very low field magnets, synchrotron radiation power, beam stability, and heat removal systems. Preliminary magnet, vacuum chamber and cooling designs are presented along with possible construction techniques, and some costing algorithms. We also consider an ep collider with 70 GeV electrons and 5 TeV protons as an injector . 1 PARAMETERS