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The Auto a lignment S ystem of GEO 600. Hartmut Grote and the GEO 600 team Max-Planck Institute for Gravitational Physics Amaldi , Perth 12-07-2001. Autoalignment - P urposes. Superimpose cavity axes with incoming bea m - Differential wavefront sensing (analog feedback for 14 DOF) - PowerPoint PPT Presentation
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The Autoalignment System of GEO 600
Hartmut Groteand the GEO 600 team
Max-Planck Institute for Gravitational Physics
Amaldi, Perth 12-07-2001
Autoalignment - Purposes
Superimpose cavity axes with incoming beam - Differential wavefront sensing (analog feedback for 14 DOF)
Center beam spot positions on mirrors - Spot position sensing (digital feedback for 20 DOF)
Autoalignment
Experimental setupfor 1 cavity
Autoalignment
Experimental setupfor 1 cavity
Autoalignment
Experimental setupfor 1 cavity
Autoalignment
Experimental setupfor 1 cavity
Differential wavefrontsensing
Orthogonalization< 1/10
Bandwith 0.2 or 6 Hz
Sensitivity typ.10 p rad / sqrt(Hz)
Autoalignment
Experimental setupfor 1 cavity
Local beam centeringservos
Bandwith ~ 1kHz
Autoalignment
Experimental setupfor 1 cavity
Spot position control
Autoalignment - Switching On and Off
Modecleaner Alignment Drift Over 1 Day
Modecleaner Alignment Drift Over 1 Day
Modecleaner Alignment Drift Over 1 Day
Autoalignment setup
PR + MI cavity
PR Mirror Rotation Autoalignment Errorsignal
PR Mirror Rotation Autoalignment Errorsignal
