Datasets of multiharmonic feedback control system tests.

A multiharmonic I/Q feedback control system is designed to suppress the undesired multiple harmonics in a wideband RF cavity. In the context of I/Q control, loop-phase calibration is required because a substantial loop phase can introduce significant crosstalk between the I/Q channels, potentially leading to instability in I/Q control. The primary contributors to the loop phase are the loop delay and frequency response of the cavity and analog devices. Therefore, it is crucial to calibrate the loop phase to a minimum value to keep the condition for closing the feedback. With successful calibration for all harmonics, the multiharmonic feedback control loops can be effectively closed, significantly suppressing the undesired harmonics. This dataset includes the measured loop phases, the loop phases after calibration, as well as the harmonic components before and after the feedback loops are closed.

本数据集针对宽带射频腔（wideband RF cavity）内非期望多谐波的抑制需求，设计了多谐波I/Q反馈控制系统（multiharmonic I/Q feedback control system）。在I/Q控制场景下，需开展环路相位校准（loop-phase calibration）：较大的环路相位会在I/Q通道间引入显著串扰，进而可能引发I/Q控制失稳。环路相位的主要来源包括环路时延、射频腔及模拟器件的频率响应。因此，将环路相位校准至最小值以满足闭环反馈条件，是保障系统稳定的关键环节。完成所有谐波的校准工作后，即可有效闭合多谐波反馈控制环路，从而显著抑制非期望多谐波。本数据集包含实测环路相位、校准后的环路相位，以及反馈环路闭合前后的谐波分量。