Description
Enabling technologies for ET
This presentation will give an overview of technologies needed for 3G detectors, indicate levels of readiness and possible roadmaps.
This talk will give an overview of the short- and long-term plans for the Maastricht 3G prototype interferometer (aka ETpathfinder). The key aims are to test the interplay of 'new' material (silicon), 'new' temperatures (120K and 10K) and 'new' wavelengths (1550nm and 2um) on systems level in a GW detector like environment and at low phase noise.
Terrestrial gravity noise, also known as Newtonian noise (NN), will be a significant low-frequency noise contribution in present and future-wave detectors. Lowering this kind of noise is important since it will allow us to explore the existence of intermediate black holes and improve estimation of source parameters.
Current research focuses on NN from seismic fields. So far, only the...
Recent work has shown that cryopumping effects between the room-temperature and cryogenic vacuum ducts in a cryogenic gravitational-wave detector can result in the growth of a layer of ice on a cryogenic test mass. Work by Kagra colleagues has examined the effect of this ice layer on quantum noise. Here, we consider the thermal noise implications of a growing ice layer. We show that the...
Squeezed light injection, as a method for the reduction of quantum noise, has been already demonstrated in the interferometric GW detectors GEO and LIGO . Recently also Advanced Virgo implemented this solution, and it will join the next observation run (O3), with frequency independent squeezed vacuum injected. This will allow a reduction of the shot noise, which is due to the quantum phase...
In interferometric gravitational wave detectors, thermal noise from the mirrors represents currently the major limitation in most of the detection band. It originates from mechanical dissipation, which is rather low in the substrates, but orders of magnitude higher in the coating films. Although a significant experimental effort has led to some improvements during these years, there is still a...
The University of Sannio and the University of Salerno joined forces to develop advanced optical coatings for 3G gravitational wave detectors.
We own a fully programmable plasma-assisted e-beam optical-coating deposition system with sub-nm accuracy/repeatability, using up to 6 different materials in a single batch, and state-of-the-art thin-film characterization facilities including AFM, STM,...
