Experimental Progress on Tests of Gravity at 20 microns
Experimental Progress on Tests of Gravity at 20 microns
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20微米重力测试实验进展
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
M. Ross
中科院分区：
文献类型：
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作者：
C. Cardenas;A. Harter;M. Ross
由于标准模型和广义相对论的不兼容，重力测试仍然处于实验物理研究的前沿。在洪堡州立大学，本科生和教师正在开发一项实验，测试 50 微米距离范围内的引力相互作用。该实验将测量当吸引子质量在平行板配置中附近振荡时扭摆的扭转，从而在摆上提供随时间变化的扭矩。扭矩变化的大小和距离依赖性将提供确定与未经测试的距离尺度上可接受的重力模型的偏差的方法。为了观察真空室内摆锤的扭转，需要具有纳弧度精度的光学系统。本文将提供实验的总体概述，并讨论环境系统效应的测量和表征，为了达到所需的灵敏度，必须理解这些效应。
Due to the incompatibility of the Standard Model and General Relativity, tests of gravity remain at the forefront of experimental physics research. At Humboldt State University, undergraduates and faculty are developing an experiment that will test gravitational interactions below the 50-micron distance scale. The experiment will measure the twist of a torsion pendulum as an attractor mass is oscillated nearby in a parallel-plate configuration, providing a time varying torque on the pendulum. The size and distance dependence of the torque variation will provide means to determine deviations from accepted models of gravity on untested distance scales. To observe the twist of the pendulum inside the vacuum chamber, an optical system with nano-radian precision is required. This paper will provide a general overview of the experiment as well as address the measurement and characterization of environmental systematic effects which must be understood in order to achieve the required sensitivity.