论文标题
重新访问时间延迟干涉率不平等的Lisa和Taiji
Revisiting time delay interferometry for unequal-arm LISA and TAIJI
论文作者
论文摘要
三个丽莎/太极拳任务的航天器遵循其各自的大地轨迹，由于轨道动力学，它们的干涉臂不平等且随时间变化。提出了时间延迟干涉法（TDI）来抑制由不平等臂引起的激光频率噪声。通过使用数值轨道，我们研究了第一代TDI构型及其相应的最佳A，E和T通道的灵敏度。来自米歇尔森和监视/信标配置的T通道的敏感性以低于10 MHz的频率与相等的情况不同，其性能随臂长的不平等而变化。在动态情况下评估激光束路径的不匹配，第一代TDI中的残留激光噪声无法满足任务要求。
Three spacecraft of LISA/TAIJI mission follow their respective geodesic trajectories, and their interferometric arms are unequal and time-varying due to orbital dynamics. Time-delay interferometry (TDI) is proposed to suppress the laser frequency noise caused by the unequal-arm. By employing the numerical orbit, we investigate the sensitivity of the first-generation TDI configurations and their corresponding optimal A, E, and T channels. The sensitivities of T channels from Michelson and Monitor/Beacon configurations diverge from the equal-arm case in frequencies lower than 10 mHz, and their performances vary with the inequality of the arm lengths. The mismatches of the laser beam paths are evaluated in a dynamic case, and the residual laser noise in the first-generation TDI could not satisfy the mission requirement.
