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中国科学院大学学报 ›› 2003, Vol. 20 ›› Issue (3): 368-375.DOI: 10.7523/j.issn.2095-6134.2003.3.018

• 优秀博士论文 • 上一篇    下一篇

万有引力常数G的精确测量(英文)

罗俊1,2, 许厚泽2   

  1. 1. 华中科学技术大学物理系, 武汉 430074;
    2. 中国科学院测量与地球物理研究所, 武汉 430074
  • 收稿日期:2002-12-22 发布日期:2003-05-10
  • 作者简介:罗俊:在博士学习期间,在SCI收录期刊发表论文20篇,荣获2000年中国科学院院长奖学金特别奖。

Determination of Newtonian Gravitational Constant G with Swing Time Method

LUO Jun1,2, HSU Houze2   

  1. 1. Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;
    2. Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430074, China
  • Received:2002-12-22 Published:2003-05-10
  • Supported by:

    supported by the National Natural Science Foundation of China

摘要:

采用长周期、高Q值的扭秤,并选择恒温、隔振、电磁屏蔽以及外界引力干扰小的实验环境,从而有效克服传统扭秤实验中扭丝的滞弹性和热弹性等影响,采用扭秤周期法在 105×10-6相对精度上测量万有引力常数G。为了进一步提高G的测量精度,还系统研究了精密扭秤实验的各种系统误差及其对G的影响

关键词: 万有引力常数, 精密测量, 扭秤

Abstract:

The Newtonian gravitational constant G is being determined with relative uncertainty of 105 parts per million by means of a high-Q torsion pendulum and the time-of-swing method, in which the period of the pendulum is altered by the presence of two 6.25 kg stainless steel cylinders.To improve the experimental precision, the properties and the systematic errors of the torsion pendulum have been studied in detail.The experimental results show that the uncertainty of G due to the fiber nonlinearity would be less than 1×10-6, the ambient temperature fluctuation with one degree would introduce a considerable uncertainty about 165 ×10-6 in the torsion spring constant

Key words: gravitational constant G, precision measurement, torsion balance

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