R&D Highlights Seismic Isolation Suspensions ISC/40m

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Presentation transcript:

R&D Highlights Seismic Isolation Suspensions ISC/40m Successful implementation of HEPI Further commissioning of platform at Stanford Suspensions Installation of Mode Cleaner triple suspension at LASTI ISC/40m Completed installation, locked lots of bits Found problem with locking scheme (sidebands on sidebands)….probably found solution (Mach-Zehnder) LIGO R&D

R&D Highlights Pre-stabilized laser Input Optics Power Stage injection locked 170 W, single frequency laser! Input Optics Thermal focussing/matching approach successfully prototyped Auxiliary Optics/Thermal compensation Successful application to initial LIGO Analysis includes inhomogeneity of coating absorption – important for substrate selection LIGO R&D

R&D Highlights Coatings Core Optics Reductions in absorption with increasing dopant in Titania (LMA) Need another factor 2-3 reduction… Core Optics Focussed on substrate selection Many ingredients – astrophysics, implementation, risks Important to get LSC input at this meeting LIGO R&D