Author/Authors :
Arnaud، نويسنده , , Nicolas and Arnault، نويسنده , , Christian and Barsuglia، نويسنده , , Matteo and Bizouard، نويسنده , , Marie-Anne and Brisson، نويسنده , , Violette and Cavalier، نويسنده , , Fabien and Chiche، نويسنده , , Ronic and Davier، نويسنده , , Michel and Eder، نويسنده , , Claude and Hello، نويسنده , , Patrice and Heusse، نويسنده , , Philippe and Kreckelbergh، نويسنده , , Stephane and Mansoux، نويسنده , , Bruno، نويسنده ,
Abstract :
In order to detect gravitational waves, the kilometric interferometer Virgo needs an active control of the positions of the suspended optical components, keeping the detector at its working point. The constraints are about 10 - 10 m RMS for the longitudinal control (“Locking”) and 10 - 9 rad RMS for the angular degrees of freedom (“Alignment”). A dedicated hardware and software named Global Control is in charge of the Locking and the Alignment loops for the Virgo experiment. This system has been designed to match the synchronization constraint and provide a flexible tool in order to easily integrate the various algorithms needed for the control of Virgo. This paper presents the technical requirements to be fulfilled by the Global Control. Then, the dedicated hardware is described and the overall architecture of the Global Control is shown.
Keywords :
Virgo , gravitational waves , ALIGNMENT , Digital control loops , locking
