Phase cameras (PCs) - developed at Nikhef and recently installed at Advanced Virgo - are capable of probing wavefront amplitude and phase in 2D for any frequency. This allows for monitoring the frequencies used to generate the error signals to lock the interferometer. Additionally, the PC has been used in the past to inform on wavefront distortions due to thermal defects in the mirrors....
We are developing a Cryogenic Superconducting Inertial Sensor (CSIS) to be employed in the forthcoming Einstein Telescope (ET). The designed displacement sensitivity for this device is a few fm/√Hz at 0.5 Hz, which is 3 orders of magnitude more sensitive than the state-of-the-art. The sensor will open pathways to monitor low-vibration motions of cryocoolers applied to the penultimate stage of...
