Abstract:Abstract. The Planck constant h was determined in 2014 by means of the French watt balance experiment at the LNE (Trappes). The relative standard uncertainty was 3.1×10 -7 . This first French determination was performed in air with a 500 g mass standard made from a Co-based superalloy. The two main corrections are the buoyancy correction of the order of 66 mg, and the magnetic interaction correction of about 37 µg. This interaction force appears between the mass artifact and the residual magnetic field coming … Show more
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