THE SEISMIC ANGULAR NOISE OF AN INDUSTRIAL ORIGIN MEASURED BY THE PRECISION LASER INCLINOMETER IN THE LHC LOCATION AREA

摘要

The decrease in the relaxation time for recovery of the horizontality of the surface of a thin layer of liquid in a cuvette is a new observed phenomenon caused by the meniscus influence in case of the cuvette small inclination. It was experimentally established that the time of reconstruction of the surface of 4-mm-thick liquid layer in the cuvette of 05 mm at 0.5 μrad calibration inclination is (0.082 ± 0.006) s. In this case the relative deviation from the liquid surface planarity does not exceed 7%. The physics explanation of the phenomenon observed is proposed. Taking into account the duration of liquid surface horizontality reconstruction in the Precision Laser Inclinometer has resulted in the widening of the inclinometer's sensitivity range up to (12.3 ± 0.9) Hz. The data obtained could be used when seismoisolating the research equipment.