Front End Electronics for Radiation Detectors Based on SiC: Application to High Dose per Pulse Charged Particle Beam Current Measurement

In high dose per pulse charged particle beams, all online detectors saturate due to ion recombination. It is therefore impossible to count detector pulses separately. Silicon carbide due to its high bandgap, high thermal conductivity, and high displacement energy, is seen as an alternative. Analyzing waveforms in real-time is challenging in terms of bandwidth, measurable energy range, sensor size, data rate. In this context, an Analog Front-End (AFE) was designed for radiation signal processing. It is based on a Transimpedance Amplifier (TIA) and Charge Sensitive Amplifier (CSA) respectively, to analyze the shape of the generated signal. The methodology used to characterize AFE for large detector capacitance is described. The results obtained from simulations, experiments, and measurements in a radiative environment are also presented.