Development of High Resolution Beam Current Measurement System for COSY-Jülich

An experiment to test Time Reversal Invariance at COSY (TRIC) requires a precise beam life-time determination. For this, a high resolution bunched beam current measurementsystem based on the Fast Current Transformer and Lock-In Amplifier has been build. The first tests of the system, read out by a new DAQ, have been done at COSY and at a teststand in the laboratory where bunched beam current was simulated using a conductive wire. A relative resolution of 1.9e-4 for the signal in the wire, equivalent to 1 mA of bunched beam current in COSY, has been obtained in the laboratory. This resolution is sufficient for the realization of the TRIC experiment