E-viri
Recenzirano
-
Braccini, S; Casciano, C; Cordero, F; Frasconi, F; Gregori, G.P; Majorana, E; Paparo, G; Passaquieti, R; Puppo, P; Rapagnani, P; Ricci, F; Valentini, R
Physics letters. A, 09/2002, Letnik: 301, Številka: 5Journal Article
We monitored the acoustic emission activity of the steel blades to be used for the mirror suspension system of a gravitational wave interferometer. We have collected several sets of events getting evidence of a material memory effect (Kaiser effect) associated to the dislocation motion in the steel. This result is more evident when we apply a standard fractal analysis procedure (box counting method) to the timing series of acoustic emission bursts. We conclude that a significant reduction of the emission rate is obtained by applying a few stress cycles to the elastic blades.
