1. G. Kramberger, Charge collection properties of heavily irradiated expitaxial silicon detectors, RESMDD04, Oct. 10-13, 2004, Firenze Setup and samples Setup and samples trigger signal is possible only for electrons passing through diode ~97% purity assures good measurements also at low S/N<1 DAQ chain (rate to disk ~ 50 Hz) ORTEC 142B preamplifier custom made shaping amp. (~25 ns) Tex 2440 oscilloscope connected to PC Properties Peltier cooling up to T=-30 o C (stable to 0.1 o C) HV (bias) up to 5 kV Full computer control (automatic scans) ~25 ns Amplifier +shaper 90 Sr/ 241 Am water cooled heat sink cold plate Peltier cooler scintillator pad detector Tex2440 thermal isolation