Hydrogen atom frequency standard dual-state selection device
A hydrogen atom, state selection technology, applied in the direction of electrical components, automatic power control, etc., can solve the problems of state selection effect and large volume, and achieve the effect of reducing volume, easy structure, and simple device principle.
Pending Publication Date: 2019-08-30
BEIJING INST OF RADIO METROLOGY & MEASUREMENT
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[0004] The purpose of the present invention is to provide a hydrogen atom frequency standard dual-state selection device to solve the problem that the existing dual-state selection device has no state selection effect on the atoms whose exit angle is zero in the collimator and has a large volume
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[0026] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.
[0027] Such as figure 1 As shown, in one embodiment of the present invention, a hydrogen atom frequency standard double state selection device is provided, and the double state selection device includes: a quadrupole tapered aperture state selection magnet 3 coaxially arranged in sequence, an atomic state reversal Module 4 and six-pole conical aperture selection magnet 6. The quadrupole tapered aperture state selection magnet 3 is used for the four kinds of atomic states emitted from the collimator 2 are |F=0, m F =0>,|F...
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The invention discloses a hydrogen atom frequency standard dual-state selection device. The dual-state selection device comprises a quadrupole conical aperture state-selecting magnet, an atomic stateinversion module and a hexapole conical aperture state-selecting magnet which are coaxially arranged in sequence, and the quadrupole conical aperture state-selecting magnet is used for screening hydrogen atoms emitted from a collimator to obtain primarily-selected hydrogen atoms with the ground state of | F = 1, mF = 0 > and | F = 1, mF = 1 >; the atomic state inversion module is used for transitioning hydrogen atoms of which the ground states are | F = 1 and mF = 1 > in the primarily-selected hydrogen atoms to | F = 1 and mF =-1 > state; the hexapole conical aperture state-selecting magnet isused for screening out hydrogen atoms transitioning to | F = 1, mF =-1 > state to obtain single-state hydrogen atoms with the ground state of | F = 1, mF = 0 >. The device is simple in structure, small in size and accurate and efficient in state selection.
Description
technical field [0001] The invention relates to a state selection device, in particular to a hydrogen atom frequency standard double state selection device. Background technique [0002] The hydrogen atom frequency standard locks the frequency of the local oscillator to the hydrogen atom ground state|F=0,m F =0〉 and |F=1,m F =0〉 ultra-fine energy level transition spectral line makes the local oscillator output a frequency signal with high stability and high accuracy, which has been widely used in timekeeping, positioning and other fields. The double-state selection device is a key component of the hydrogen atomic frequency standard. It is based on the force of the atoms in different states in the two magnets and the process of atomic state reversal between the two magnets for |F=1,m F =0〉Atoms in the state carry out singlet selection. The state selection efficiency and volume of the double state selection device directly affect the performance and volume of the whole cloc...
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CPCH03L7/26
Inventor 王秀梅周铁中张程源吴琼王孟芝卢旭刘亚轩高连山
Owner BEIJING INST OF RADIO METROLOGY & MEASUREMENT