New apparatus for detecting micron-scale deviations from Newtonian gravity
New apparatus for detecting micron-scale deviations from Newtonian gravity
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用于检测牛顿引力微米级偏差的新装置
DOI：
10.1103/physrevd.77.062006
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发表时间：
2008
影响因子：
5
通讯作者：
A. Kapitulnik
中科院分区：
文献类型：
--
作者：
D. Weld;J. Xia;B. Cabrera;A. Kapitulnik
我们描述了一种用于探测或约束短尺度牛顿引力偏差的新仪器的设计和构造。该装置由一种新型的旋转质量驱动探头和悬臂式测力装置组成，用于直接测量相隔几十微米的两个微加工质量之间的力。我们提供了实验的第一批数据，并讨论了使用该探测器更精确地约束或检测非牛顿效应的前景。目前，对具有吸引力的质量依赖力的灵敏度等于在$5\Text{}\Text{}\EnsureMath{\Mu}\Maththm{m}$附近的现有最佳长度范围内的极限。在该水平上没有检测到非牛顿效应。
We describe the design and construction of a new apparatus for detecting or constraining deviations from Newtonian gravity at short length scales. The apparatus consists of a new type of probe with rotary mass actuation and cantilever-based force detection which is used to directly measure the force between two micromachined masses separated by tens of microns. We present the first data from the experiment, and discuss the prospects of more precisely constraining or detecting non-Newtonian effects using this probe. Currently, the sensitivity to attractive mass-dependent forces is equal to the best existing limits at length scales near $5\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$. No non-Newtonian effects are detected at that level.