標題: The application of laser metrology and resonant optical cavity techniques to the measurement of G
作者: Ni, WT
Liu, DK
Liu, TT
Mei, HH
Pan, SS
Pan, CP
Yeh, HS
物理研究所
Institute of Physics
關鍵字: gravitational constant;Fabry-Perot interferometer;laser metrology;fundamental constant;fundamental physics
公開日期: 1-六月-1999
摘要: Our goal is to measure the gravitational constant G to within 1-10 ppm using a high-finesse Fabry-Perot optical cavity. The two high-reflectivity mirrors of the Fabry-Perot cavity will be suspended separately by two nearly identical simple pendulums of length about 1 m. For the source of attraction, we have built a rotating mass source with 12 lead bricks (each brick is of mass 11.5 kg) on each of two opposite sides of a rotating table. The period of rotation can be adjusted. We normally use a rotation period of 200 s. For this rotating mass, the relative equilibrium displacement of the two mirrors is over 10 nm and we are working for a preliminary measurement of this distance to one part in 10(4). Auxiliary quantities such as the positions of the test mass and the positions of Fabry-Perot cavity mirrors can be monitored using real-time laser metrology. The stability and real-time monitoring of the pendulums, building stability, and the compensation or averaging of mass inhomogeneity need special considerations.
URI: http://dx.doi.org/10.1088/0957-0233/10/6/314
http://hdl.handle.net/11536/31329
ISSN: 0957-0233
DOI: 10.1088/0957-0233/10/6/314
期刊: MEASUREMENT SCIENCE & TECHNOLOGY
Volume: 10
Issue: 6
起始頁: 495
結束頁: 498
顯示於類別:會議論文


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