Determining the effect of relative size of sensor on calibration accuracy of TEM cells

作     者：Yun-Sheng Jiang Cui Meng Han-Bing Jin Ping Wu Zhi-Qian Xu Liu-Hong Huang 

作者机构：Key Laboratory of Particle and Radiation Imaging Ministry of Education Beijing 100084 China Department of Engineering Physics Tsinghua University Beijing 100084 China 

出 版 物：《Nuclear Science and Techniques》 (核技术（英文）)

年 卷 期：2019年第30卷第6期

页      面：104-113页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 

主　　题：D-Dot Electromagnetic sensor Time-domain calibration Accuracy Numerical simulation 

摘      要：The time-domain calibration coefficient of a D-Dot sensor should be identical across various transverse electromagnetic (TEM) cells to comply with the IEEE Std 1309. However, in our previous calibration experiments, poor consistency was observed. The size of D-Dot sensors relative to TEM cells is considered the main reason for this poor consistency. Therefore, this study aims at determining the calibration coefficient of a D-Dot sensor. We calculate the theoretical coefficient as a reference. Practical calibration experiments involve the processing of TEM cells with three different sizes. To observe the response more clearly, corresponding models are constructed and numerical simulations are performed. The numerical simulations and experimental calibration are in good agreement. To determine the calibration accuracy, we quantify the accuracy using the relative error of the calibration coefficient. By comparing the coefficients obtained, it can be concluded that the perturbation error is about 15% when the relative size is over 1/3. Further, the relative size should be less than 1/5 to obtain a relative error below 10%.