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

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, , Citation K Okutomi et al 2015 J. Phys.: Conf. Ser. 610 012040 DOI 10.1088/1742-6596/610/1/012040

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koki.okutomi@nao.ac.jp

Author affiliations

1 Graduate University for Advanced Study, Shonan Village, Hayama, Kanagawa 240-0193, Japan

2 National Astronomical Observatory of Japan, Osawa 2-21-1, Tokyo 181-8588, Japan

3 Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan

4 Ochanomizu University, 2-1-1, Tokyo 112-0012, Japan

5 Faculty of Engineering, Hosei University, kajinocho, Tokyo 184-8584, Japan

6 LIGO Hanford Observatory, 127124 N Rte 10, Richland, WA 99354, USA

7 Department of Astronomy, The University of Tokyo, Tokyo 113-0033, Japan

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1742-6596/610/1/012040

Abstract

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 × 10-15 N/√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.

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10.1088/1742-6596/610/1/012040