Vacuum chamber with seismic isolation of an optical test platform

要求建立一个具有主动和被动地震隔离的真空系统，以建立一个测试设施，用于开发未来地基引力波探测器的惯性传感器和仪器。这种探测器的目标是将低频性能提高几个数量级，为此，他们必须设计新的策略来减少地震噪声和测试质量控制。这里要求的设施将使我们能够模拟我们实验室中大型探测器所达到的条件，反过来，这使我们能够灵活地部署，开发和测试各种传感器。为此，需要具有相应大开口的大真空室，以创建理想的设施来执行这种传感器的精细调节和组装。位于隔离光学试验板上方的测试空间的尺寸使我们能够部署高度高达1.2米的反射镜悬挂。约1.5米的体积的长度也使我们能够实现这种悬浮液之间的光学谐振腔配置。隔离概念结合了商业现成的项目，以建立一个积极的隔离室和被动隔离的试验板内的真空信封。选择这种方法是为了使系统快速可用，而嵌套的主动和被动隔离的组合将使我们能够在未来的实验中不断优化隔离和调谐。该概念包括，可以快速测试新的传感器，而无需等待或调整到更严格的要求和更大的可用基础设施中的此类测试的时间表。

A vacuum system with active and passive seismic isolation is requested to establish a test facility for the development of inertial sensors and instruments for future ground-based gravitational wave detectors. Such detectors aim to improve low-frequency performance by several orders of magnitude and to this end, they have to devise novel strategies to reduce seismic noise and test mass control. The here requested facility will enable us to emulate the conditions achieved at large detectors in our laboratory and, in turn, this allows us to flexibly deploy, develop and test various sensors. To this end, a large vacuum chamber with correspondingly large opening is required to create a facility that is ideal to perform fine adjustment and assembly of such sensors. The test volume, situated above an isolated optical breadboard, has dimensions that enable us to also deploy mirror suspensions with a height of up to 1.2m. The length of the volume of about 1.5m also enables us to realize and optical resonator configuration between such suspensions. The isolation concept combines commercial-off-the-shelf items to establish an active isolation of the chamber and a passive isolation of the breadboard inside the vacuum envelope. This approach was chosen to make the system quickly available, while the combination of nested active and passive isolation will enable us to continuously optimize the the isolation and tuning in future experiments. The concept includes, that novel sensors can be tested quickly, without needing to wait or adjust to the more stringent requirements and schedules of such tests in the larger, available infrastructures.