Numerical modeling and circuit simulation of alpha particle detection using CdTe-based sensor arrays

Abstract

This paper investigates the design and simulation of cadmium telluride (CdTe)-based semiconductor sensors optimized for alpha particle detection in controlled environments. Leveraging the superior radiation sensitivity and high atomic number of CdTe, a compact detection module is modeled using finite element techniques to estimate charge collection efficiency and transient response characteristics. The electrical output signal generated by alpha interactions is then mapped onto an analog signal processing circuit and simulated using LTspice for performance evaluation. Signal amplification, noise reduction, and time response are quantitatively analyzed and benchmarked against existing detection systems. The results demonstrate that CdTe sensors provide reliable sensitivity and fast detection capability, making them suitable for real-time radiation monitoring applications.