论文标题
丽莎探路者中的瞬态加速事件数据：属性和可能的物理起源
Transient acceleration events in LISA Pathfinder data: properties and possible physical origin
论文作者
论文摘要
我们在Lisa Pathfinder的差分加速度数据中，对瞬态事件或故障进行了深入分析，或毛刺。我们表明，这些小故障属于两个截然不同的类别：一侧的干涉运动读数中的快速瞬变，另一侧的真实力瞬态事件。前者在普通条件下是快速而罕见的。第二个可能持续几秒钟到几个小时，构成了大多数故障。我们介绍了这两种类别的物理和统计特性的分析，包括与其他时间序列（如磁场，温度和其他动态变量）进行的交叉分析。基于这些分析，我们讨论了力故障的可能来源，并确定最有可能的可能性，其中围绕测试量的环境脱颖而出。我们讨论了这些发现对LISA设计和运营的影响，以及一些缓解风险的措施，包括可能在实地进行的实验研究，旨在阐明我们的分析留下的一些问题。
We present an in depth analysis of the transient events, or glitches, detected at a rate of about one per day in the differential acceleration data of LISA Pathfinder. We show that these glitches fall in two rather distinct categories: fast transients in the interferometric motion readout on one side, and true force transient events on the other. The former are fast and rare in ordinary conditions. The second may last from seconds to hours and constitute the majority of the glitches. We present an analysis of the physical and statistical properties of both categories, including a cross-analysis with other time series like magnetic fields, temperature, and other dynamical variables. Based on these analyses we discuss the possible sources of the force glitches and identify the most likely, among which the outgassing environment surrounding the test-masses stands out. We discuss the impact of these findings on the LISA design and operation, and some risk mitigation measures, including experimental studies that may be conducted on the ground, aimed at clarifying some of the questions left open by our analysis.
