As straylight will become one of the important limitations, especially for Einstein Telescope low-frequency detector, we investigate new laser operation concepts for a more straylight-resilient detector configuration.
Our main focus is the use of tunable coherence realized by phase modulation following a pseudo-random-sequence on the interferometer laser. This breaks the coherence of the...
Current and next-generation gravitational wave detectors, such as the Einstein Telescope, face significant challenges from Newtonian noise caused by seismic activity, which limits the accuracy of detector measurements. One approach to mitigate this noise is to use large sensor arrays that monitor seismic activity for real-time correction and post-processing. Distributed Acoustic Sensing (DAS)...
Monocrystalline silicon fibers are a promising candidate to be used in gravitational-wave detectors for suspension of silicon test masses. Excellent thermal and mechanical characteristics of crystalline silicon enable stable support of heavy silicon mirrors and effective extraction of laser beam heat deposited therein. In addition, outstanding material properties of silicon at cryogenic...
Magnetic Anti-Springs (MAS), based on rare earth permanent magnets, represent the conceptual design solution adopted for the mechanical filters of the Superattenuators for seismic noise suppression in the ET interferometer. These MAS devices are designed to suspend heavier payloads while significantly improving the passive vertical attenuation performance of the multi-stage...
Two of the main limitations for the sensitivity of the current and future gravitational wave ground-based interferometers come from the optical aberrations - which impact the possibility to operate the detector at high power, a required condition to improve the quantum noise – and from the high-reflectivity coatings of the optics - which define the level of thermal noise.
The AiLoV-ET...
Tower Vacuum pumping is a challenge driven by the stringent ‘one order of magnitude better than 2G’ residual pressure requirement and the high, variable gas loads from the large and complex in-vacuum experimental assemblies. We propose cryogenics as the most effective and potentially only solution for towers pumping, also for the HF interferometer.
In an initial feasibility test, we...
