The laser interferometer space antenna (LISA) is a future space-based gravitational wave detector designed to be sensitive to sources radiating in the low frequency regime (0.1 mHz to 1 Hz). LISA’s interferometer signals will be dominated by laser frequency noise which has to be suppressed by about seven orders of magnitude using an algorithm called time delay interferometry (TDI). Arm locking has been proposed to reduce the laser frequency noise by a few orders of magnitude to reduce the potential risks associated with TDI. In this paper, we present an updated performance model for arm locking for the new LISA mission using 2.5 Gm arm lengths, the currently assumed clock noise, spacecraft motion based on LISA Pathfinder data and shot noise. We also update the Doppler frequency pulling estimates during lock acquisition.

中文翻译：

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新 LISA 设计的手臂锁定性能

激光干涉仪空间天线 (LISA) 是一种未来的天基引力波探测器，旨在对低频范围（0.1 mHz 至 1 Hz）的辐射源敏感。LISA 的干涉仪信号将由激光频率噪声主导，必须使用称为时间延迟干涉测量 (TDI) 的算法将其抑制大约七个数量级。臂锁已被提议将激光频率噪声降低几个数量级，以降低与 TDI 相关的潜在风险。在本文中，我们使用 2.5 Gm 臂长、当前假设的时钟噪声、基于 LISA Pathfinder 数据的航天器运动和散粒噪声，为新的 LISA 任务提出了臂锁定的更新性能模型。我们还在锁定获取期间更新多普勒频率牵引估计。