Detection of the Rotation of the Earth with a Superfluid Gyrometer

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
1997
Major/Subject
Mcode
Degree programme
Language
en
Pages
3602-3605
Series
Physical Review Letters, Volume 78, Issue 19
Abstract
The effect of the rotation of the Earth, Ω⊕, on a superfluid resonator equipped with a 4.0 cm exp 2 rotation pickup loop and with a microaperture is reported. The velocity circulation induced in the loop by the rotation is detected by phase-slippage techniques. The magnitude of Ω⊕ is measured to better than 1%, and the north direction to ±0.5° for a 10 h observation time. This experiment is the superfluid counterpart of interferometric measurements based on the Sagnac effect.
Description
Keywords
ring laser, phase, 4He, dissipation
Other note
Citation
Avenel, O. & Hakonen, Pertti J. & Varoquaux, E. 1997. Detection of the Rotation of the Earth with a Superfluid Gyrometer. Physical Review Letters. Volume 78, Issue 19. 3602-3605. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.78.3602