Investigation of mechanical losses of thin silicon flexures at low temperatures

Details Investigation of mechanical losses of thin silicon flexures at low temperatures Investigation of mechanical losses of thin silicon flexures at low temperatures

2010-03-15

arxiv.org/abs/1003.2893v1

Physics

Condensed Matter

Materials Science

16 pages, 7 figures

Scientific paper

The investigation of the mechanical loss of different silicon flexures in a temperature region from 5 to 300 K is presented. The flexures have been prepared by different fabrication techniques. A lowest mechanical loss of $3\times10^{-8}$ was observed for a 130 $\mu$m thick flexure at around 10 K. While the mechanical loss follows the thermoelastic predictions down to 50 K a difference can be observed at lower temperatures for different surface treatments. This surface loss will be limiting for all applications using silicon based oscillators at low temperatures. The extraction of a surface loss parameter using different results from our measurements and other references is presented. We focused on structures that are relevant for gravitational wave detectors. The surface loss parameter $\alpha_s$ = 0.5 pm was obtained. This reveals that the surface loss of silicon is significantly lower than the surface loss of fused silica.

Affiliated with

Also associated with

No associations

Rating

Investigation of mechanical losses of thin silicon flexures at low temperatures does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Investigation of mechanical losses of thin silicon flexures at low temperatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Investigation of mechanical losses of thin silicon flexures at low temperatures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-214235