Task T2 – Working group Auriga-LNLTask T2 – Working group Auriga-LNL

Sub-task: Test and set-up of high finesse cavities at low temperature

Present statePresent state•Room temperature cavities F>10Room temperature cavities F>1044 tested tested

•Optical transducer cavity Optical transducer cavity

•Cryogenic test facility Cryogenic test facility

First 18 months (starting First 18 months (starting now) now)

First measurements at low temperature on the First measurements at low temperature on the transducer cavitytransducer cavity

Rest of the time (months 19-Rest of the time (months 19-36)36)

Cool down of a dedicated facilityCool down of a dedicated facility

Task T2 – Working group Auriga-LNLTask T2 – Working group Auriga-LNL

Sub-task: Dynamic photo-thermal effect measurements at low temperature

Present statePresent state•Room temperature measurement of photo-thermalRoom temperature measurement of photo-thermal

•Optical transducer cavity almost readyOptical transducer cavity almost ready

•Cryogenic test facility readyCryogenic test facility ready

First 18 months (start month First 18 months (start month 13) 13)

Rest of the time (months 19-Rest of the time (months 19-36) 36)

Development of an high sensitivity (kHz region) optical Development of an high sensitivity (kHz region) optical benchbench

•Measurement of photo-thermal effect at low Measurement of photo-thermal effect at low temperature for fused silicatemperature for fused silica