STREGA Start up Meeting

IGR - Geppo Cagnoli

EGO – Cascina – 12th May 2004

2

M1 – Advanced Materials for Mirror Substrates

• The thermal and loss properties of Silica at low temperature are not very good

• Sapphire is much better but it is dominated by thermoelastic noise

• IGR has proposed to use Si for substrates

Sheila Rowan

@100 Hz

3

M1 – Advanced Materials for Mirror Substrates

Meas. at room T on Si and CaF2

Meas. at low T on Si and CaF2

Investigation on the doping effect on Si

Investigation on silicate bonding at low T

Optical measurements on Si and CaF2

Prototypes

Writing report

IGR ON GOING ACTIVITIES IGR FUTURE ACTIVITIES

4

M1 – Advanced Materials for Mirror Substrates

2 CRYOSTATS

40X30cm

5

M1 – Advanced Materials for Mirror Substrates

IGR collaborates with Stanford on the M1 activities

6

M5 – Innovative Materials for Ad. Det. Suspensions

• Extend the experience of GEO600 from silica to silicon monolithic suspensions

• Silicon

ribbons• Silicon cantilever blades

• Silicate bonding

7

M5 – Innovative Materials for Ad. Det. Suspensions

Measurements on Si, YAG, Mo, Ru fibres

Production of monocrystalline fibres

Measurements on monocrystalline fibres

Local cooling of monocrystalline fibres

Prototypes

Writing report

IGR ON GOING ACTIVITIES IGR FUTURE ACTIVITIES

IGR POSSIBLE ACTIVITIES

IGR collaborates with Stanford on the M5 activities