The new ΔE/E detection system, calorimeter telescope (CATE), for charge and mass determination of heavy ions at high energies (>=100 MeV/n) has been designed. CATE, a calorimeter telescope will consist of position sensitive Si detectors for ΔE determination and scintillators, readout by either PIN diode or PMT, for total-E determination. Different scintillation detectors were tested with 1 3 0 Sn, 1 8 6 Pb, 1 9 7 Au and 2 3 8 U beams of (100-300) MeV/n ion energy. By properly selecting the beam species from the FRS and applying position corrections, an energy resolution of ~0.5% FWHM was observed. The corresponding mass resolution of 1/200 is adequate for employment of CATE in the Fast Beam RISING campaign at GSI.