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

10th International LISA Symposium

Okutomi, K.^1 ; Akutsu, T.^2 ; Ando, M.^3 ; Nikaido, M.^4 ; Tanaka, N.^2 ; Torii, Y.^2 ; Sato, S.^5 ; Izumi, K.^6 ; Chen, D.^7

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;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/610/1/012040/pdf
DOI  :  10.1088/1742-6596/610/1/012040

来源: IOP

【 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.