我所刘泽老师课题组完成的论文《Four-Channel-in-One Calculable Capacitor》于2024-10在《IEEE Transactions on Instrumentation and Measurement》正式发表。论文摘要如下：
Abstract: In this article, we have developed and tested a four-channel precision differential calculable capacitor (CC) for evaluating the gravitational reference sensor electronics of TianQin. Traditionally, the CC was designed as a single-channel capacitor with a range of less than 0.6 pF. Here, we propose a compact design for a four-channel-in-one CC that can improve the nominal capacitance by more than threefold to 2 pF. To validate this principle, we constructed a prototype with four capacitances, including two fixed capacitances of 1.9 pF, one finely adjustable capacitance with a range of 180 fF, and one coarsely adjustable capacitance with a range of 0.18–2.2 pF. The mutual capacitance variance among channels is less than 12 aF when adjusting across the full range. Additionally, a linear relationship between capacitance and the displacement of the moving guard electrodes has been established. With temperature control, the stability of certain channels exceeds 2.5 aF/10 h. This capacitor meets the requirements for testing the TianQin electronics for time periods on the order of hours.
引用信息：Xiaoxia He, Shengjun Hong, Ze Liu, Jingming Cao, Zewen Wan, Xu Zeng. Four-Channel-in-One Calculable Capacitor. IEEE Transactions on Instrumentation and Measurement, 2024-01-01. DOI: 10.1109/tim.2024.3470032