Abstract
Abstract
The residual gas damping in the enclosure surrounding a free-fall test mass is an important limiting factor for the sensitivity of some space detection missions. We present a constrained volume damping model for space-borne gravitational wave detection, which depends on the escape time needed for a molecule to diffuse out of the gap between two adjacent surfaces. Using a completely inelastic molecular collision prediction, we calculate the escape times in the two most common constrained volumes, cylinder and cuboid, respectively. Both calculations agree well with Monte Carlo simulations. Additionally, the theoretical model of the residual gas damping presented in this work is in good agreement with the experimental results in the ground torsion pendulum test of LISA and its precursor LISA Pathfinder.
Funder
National Natural Science Foundation of China
Guangdong Major Project of Basic and Applied Basic Research
National Key R&D Program of China
Fundamental Research Funds for the Central Universities, HUST
Subject
Physics and Astronomy (miscellaneous)
Cited by
2 articles.
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