Gravitational Wave Group
Contamination Speed due to cryogenic molecule absorption
Contents
In this experiment, The reflectance of an ultra-low loss dielectric multilayer
coating mirror ,which was cooled at 10 K and exposed to 300K vacuum space, was
monitored as the finesse of a Fabry-Perot cavity for two months.
Experimental Setup
Setup for finesse measurement
Exposure of the input mirror to the 300 [K] vacuum space.
Result
The reflectance was measured to decrease with a rate of 0.12^{+0.12}_{-0.08}
ppm per day.