II. Workshop on ET-LF TM Tower Integration

Session

Payload and super-attenuator design

26 Mar 2025, 09:00

Building 200, room 139 (IJCLab in Orsay)

1. The payloads for the Test Masses of the ET-LF and ET-HF interferometers: status and perspectives

Paola Puppo

26/03/2025, 09:00

The payloads are the last stage suspensions for the test masses. They are designed to fullfil the requirements coming from the control system and and the sensitivity of the detector. The status of the designs for the payloads, both in the LF and HF interferometers, will be presented.

4. The reference solution: a Superattenuator for Einstein Telescope

Francesca Spada

26/03/2025, 09:45

The Superattenuator - a cornerstone in seismic isolation systems for ground-based interferometers - is recognized as the seismic isolation reference solution for the Einstein Telescope in both the 2011 and 2020 Technical Reference Documents.
As seismic isolation system design progresses, evaluating the impact of targeted interventions on the performance of existing solutions is essential for...

3. Super-Attenuator Design Concept Integrating an Active Platform and an Inverted Pendulum

Thomas Giordano (ULiège)

26/03/2025, 11:00

This work originates from the aim of reducing the height of the 17 m suspension chain considered in the ET 2011 Conceptual Design Report and its 2020 Update. The presentation focuses on the current state of design and modelling of a candidate solution integrating both an inverted pendulum and an active platform. This key feature allows reducing the height of the seismic attenuation chain,...

5. An Active platform for the Inverted Pendulum of the Superattenuator

Franco Frasconi (INFN Pisa)

26/03/2025, 11:45

The Seismic Isolation System of the Advanced VIRGO, based on the working principle of a multi-stage pendulum hung to a three legs mechanical structure of the Inverted Pendulum, is equipped with 3 Piezoelectric actuators encapsulated with a foot structure. So far,these tools were never used to compensate seismic motion at very low frequencies regime due to missing high sensitivity sensor and...