Pre-amplifiers for multi-wire proportional counters

Position sensitive multi-wire proportional counters (MWPC) are regularly used in fusion-fission experiments for detection of evaporation residues following fusion and measurements of mass, angle and total kinetic energy of fission fragments. MWPC with four electrodes geometry; cathode followed by Y - position electrode, anode and X-position electrode; are being used as focal plane detectors of Heavy Ion Reaction Analyzer (HIRA) and HYbrid Recoil mass Analyzer (HYRA) at IUAC. MWPC with five electrode geometry, having an extra cathode, are used in fission experiments. The fast timing and position signals from MWPC electrodes need further amplification by fast pre-amplifiers while a charge-sensitive pre-amplifier (CSPA) is required to process cathode signal to extract energy information without degrading rise time and signal to noise ratio