Research on supporting mounts of spheres in measurement of gravitational constant G
作者： Qing Li , Jian-Ping Liu , Chao Xue , Jun-Fei Wu , Shan-Qing Yang
DOI: 10.1063/1.4944475
关键词: Vibration 、 Gravitational constant 、 SPHERES 、 Physics 、 Optics 、 Mathematical analysis 、 Mount used 、 Position (vector) 、 Angular acceleration 、 Repeatability 、 Stability (probability)
摘要: The ongoing precision measurement of the gravitational constant G at our group is performed by using two different kinds methods: time-of-swing method (ToS) and angular acceleration feedback method. In methods, stainless steel spheres are employed as source masses, position stability an important parameter, which make suitable mounts for supporting needed extremely. this paper, upgraded three-point mount introduced tested in detail. Experimental results show that, sphere supported used ToS method, repeatability, temperature influence, vibration influence all less than 0.1 μm (about 2 ppm value G). For AAF similar obtained, largest change sphere's about 0.6 μm, a 1 °C, also uncertainty G.
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