Agenda

• 1-Hz lines: differences in h-rec and Pr_B1_ACp channel (S. D'Antonio)
• Lines: non stationarity during WSR12 and Easter long lock (S. D'Antonio)
  

Minutes

Participants:
E.Cuoco, E.Calloni, F.Frasconi, G.Vajente, J.Marque, F.Carbognani, P.Rapagnani, I.Fiori, B.Swinkles, M.Punturo, S.D'Antonio, C.Palomba, F.Nocera, F.Paoletti

Sabrina showed the results of the analysis for lines identification during WSR12.
In particular she showed, as Gabriele already observed in his entry in the logbook, that t 1Hz and its harmonics are not visible in Pr_B1_ACp, but only in Hrec. Few lines (16Hz and 32Hz) are anyhow present in the DF B1_ACp signal.

Sabrina reported also on the slow non stationarity of many lines. Most of them are resonances either of wires or of mirrors, and so it is evident the correlation with temperature changes inside the tower.

Actions: update the list already prepared by Irene for VSR1, with the list of lines of Sabrina and Cristiano and create a list of unknown lines for which  we need investigating.