Special LIGO Seminar

This work was carried out in collaboration with Rana Adhikari Caltech group

and aiming at development of the cryogenic silicon ribbon suspension

prototype. Mechanical loss of the black Acktar coating has been estimated

based on measurements of Q-factors of vibrational modes of coated and

uncoated silicon wafers. Further measurements required to determine the test

mass thermal noise are planned to be performed at Caltech. It will allow

finding a compromise between loss and reflectance of the coating which

provides the optimal cryogenic operation.  We started also to study losses

in bonding between two silicon samples using the silicon oscillator formed

by two silicon ribbons bonded to a silicon wafer.

We plan to broadcast this talk using SeeVogh.