Design of the new METAS watt balance experiment Mark II
Design of the new METAS watt balance experiment Mark II
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DOI：
10.1088/0026-1394/50/3/235
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发表时间：
2013-06-01
期刊：
影响因子：
2.4
通讯作者：
Tommasini, D.
中科院分区：
文献类型：
--
作者：
Baumann, H.;Eichenberger, A.;Tommasini, D.
千克是国际单位制（SI）的最后一个单位，仍然基于一个物质人工制品，即国际千克原型（IPK）。在过去的一百年中所做的比较清楚地表明，IPK和在类似条件下保存在国际计量局的官方副本之间存在长期的相对漂移。一个基于基本常数的千克新定义的有希望的途径是瓦特平衡实验，它将质量单位与普朗克常数h联系起来。十多年来，联邦计量研究所METAS一直积极致力于功率平衡实验的概念和开发。本文介绍了Mark II METAS功率天平的新设计。描述和讨论了实验的不同组成部分的特性。
The kilogram is the last unit of the international system of units (SI) still based on a material artefact, the international prototype of the kilogram (IPK). The comparisons made in the last hundred years have clearly revealed a long-term relative drift between the IPK and the official copies kept under similar conditions at the Bureau International des Poids et Mesures. A promising route towards a new definition of the kilogram based on a fundamental constant is represented by the watt balance experiment which links the mass unit to the Planck constant h. For more than ten years, the Federal Institute of Metrology METAS has been actively working in the conception and development of a watt balance experiment. This paper describes the new design of the Mark II METAS watt balance. The metrological characteristics of the different components of the experiment are described and discussed.