Residual Gas Noise in the Test-mass Module for DECIGO Pathfinder

[摘要] DECIGO Pathfinder is the first milestone mission for DECIGO, a future gravitational wave antenna. In DPF, residual gas noise acting on the test mass is estimated to increase and exceed the requirement for force noise of 1 10-15N/√Hz due to geometry of the test-mass module. We performed a Monte Carlo simulation to calculate the residual gas noise and found that the engineering model of the test-mass module cannnot satisfy the requirement. To reduce the gas noise, we present revised geometry of the test-mass module using comb-like electrodes.

[发布机构] Graduate University for Advanced Study, Shonan Village, Hayama, Kanagawa; 240-0193, Japan^1;National Astronomical Observatory of Japan, Osawa 2-21-1, Tokyo; 181-8588, Japan^2;Department of Physics, University of Tokyo, Tokyo; 113-0033, Japan^3;Ochanomizu University, 2-1-1, Tokyo; 112-0012, Japan^4;Faculty of Engineering, Hosei University, kajinocho, Tokyo; 184-8584, Japan^5;LIGO Hanford Observatory, 127124 N Rte 10, Richland; WA; 99354, United States^6;Department of Astronomy, University of Tokyo, Tokyo; 113-0033, Japan^7

[关键词] Comb-like;Engineering modeling;Gravitational wave antennas;Mass module;Residual gas