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ABSTRACT: We propose to extend the physics program of CERES/NA45 to the year 2000. A major effort will be undertaken to (i) install a TPC for momentum analysis to improve the mass resolution to ffim=m 1% at the ae=! resonance and (ii) significantly increase the rate capability of the experiment and update our second-level trigger scheme. The motivation for this effort stems from the recent observation, by the CERES and HELIOS/3 collaborations, of a new source of low-mass dilepton pairs. Its physics origin may be the onset of the restoration of chiral symmetry in hot and dense matter. With pair samples dramatically superior in size and quality to those previously collected, a systematic study of dependencies of production of continuum pairs and the vector mesons on multiplicity, transverse momentum and baryon density should enable us to scrutinize this exciting physics perspective. 1 Introduction CERES is an experiment dedicated to the measurement of low-mass e + e Gamma pairs emitted in ...