Speaker
Description
With the development of new generation detectors, many fundamental or technical noise sources that do not limit the performance of existing detectors must be controlled; in particular, vibrational and acoustic noise generated by the technical equipment necessary for the detector’s operation (pumps, ventilation, DAQ, etc…). Here, we focus on the acoustic noise generated by the air conditioning system and its coupling with the mirrors via gravitational attraction of the masses involved in the vibrations of the various material domains. The model is then used to predict the noise that a ventilation system identical to Virgo’s would produce in the context of ET. This coupling, known as Newtonian noise, is not a limiting factor for Virgo, but the study shows that it is likely to impact the ET detector’s measurements. Among other things, the proposed model would enable the dimensioning of the ET caverns, as well as the positioning of the various sensitive equipment and sources, in order to reduce the generated Newtonian noise.