Proximity charge sensing is a novel technique used in the field of radiation detection. This research examines the simulation of a pixelated anode proximity charge-sensing device on CZT semiconductors to evaluate the potential performance of the proximity sensing technique on room-temperature detector materials for imaging purposes. The weighting potentials (WPs), of proximity-sensing and directly deposited electrode pixelated designs, were generated using ANSYS Maxwell, and the best design will be considered for the implementation step in the future. The simulation investigated two features of the proximity design, pixel size and pixel pitch. Three different pixel sizes were used in the simulation designs, 0.5 × 0.5 mm², 1.0 × 1.0 mm², and 2.0 × 2.0 mm². The 0.5 × 0.5 mm² pixel size had the best WP profile, where the generated signal for one radiation energy did not depend on the interaction location. Pixel pitch was examined using the same pixel size, 1.0 × 1.0 mm², and varying the pixel pitch from 2.0 mm, 3.0 mm up to 4.0 mm. The results showed that as the pixel pitch increases, the signal crosstalk (charge sharing between pixels) decreases. However, as the pixel pitch increases, the spatial resolution of the imaging system decreases, making it difficult to observe objects smaller in diameter than the pixel pitch. Additionally, proximity charge sensing designs showed better performance in terms of signal crosstalk for the same pixel size and pixel pitch in comparison with directly deposited designs.

接近电荷感测是在放射线检测领域中使用的新技术。这项研究检查了在CZT半导体上的像素化​​阳极接近电荷感测设备的仿真，以评估接近感测技术在用于成像目的的室温检测器材料上的潜在性能。接近感应和直接沉积的电极像素化设计的加权势（WPs）是使用ANSYS Maxwell生成的，未来的实施步骤将考虑最佳设计。仿真研究了接近度设计的两个特征，即像素大小和像素间距。三种不同的像素尺寸在模拟设计被使用的，0.5×0.5毫米²，1.0×1.0毫米²，和2.0×2.0毫米²。0.5×0.5 mm ²像素大小具有最佳的WP轮廓，其中针对一种辐射能量生成的信号不依赖于交互位置。使用相同的像素大小1.0×1.0 mm ²检查像素间距，并将像素间距从2.0 mm，3.0 mm更改为4.0 mm。结果表明，随着像素间距的增加，信号串扰（像素之间的电荷共享）减少。然而，随着像素间距的增加，成像系统的空间分辨率降低，使得难以观察到直径小于像素间距的物体。此外，与直接沉积的设计相比，在相同像素大小和像素间距的情况下，接近电荷感测设计在信号串扰方面表现出更好的性能。