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US 2010/0244970 A1Published application
Atomic clock regulated by a static field and two oscillating fields
AssigneeCommiss. A L'energie Atom. Et Aux Energ. Alterna.
InventorsMatthieu Le Prado, Jean-Michel Leger
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Abstract
An atomic clock including a mechanism applying both a static magnetic field and two oscillating magnetic fields, all mutually perpendicular, in a magnetic shield. The amplitudes and frequencies of the oscillating magnetic fields may be chosen so as to annihilate energy variations between sub-transition levels of excited atoms and to reinforce a clock output signal, and with low sensitivity to defects in regulation.
Claims8
1-8. (canceled)
An atomic clock comprising:
- a cell filled with a gas;
- an exciter of the gas to make its atoms jump to a higher energy level;
- a detector to collect a light signal passing through the gas;
- a magnetic shield around the cell;
- and
- means for applying magnetic fields, including a static magnetic field, wherein the means for applying magnetic fields also applies two oscillating magnetic fields, perpendicular to each other and to the static magnetic field, such that a Bessel function of a first kind of a ratio γHΩ/Ω, in which HΩ and Ω are an intensity and a frequency of one of the oscillating magnetic fields, which has a lower frequency than the other, and y is a gyromagnetic ratio, is equal to 0.
3 more elements
Dependencies are inferred from the claim text.