Method, apparatus and system for eliminating deposit of atoms on Zeeman cooling window

A technology of atoms and windows, applied in the field of atomic optical clocks, can solve problems such as window glass pollution, and achieve the effect of flexible application and high light transmission rate

Active Publication Date: 2011-04-20
NAT INST OF METROLOGY CHINA
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Problems solved by technology

[0007] In view of this, the object of the present invention is to propose a method, device and system for removing atoms deposited in a Zeeman cooling window in a str

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  • Method, apparatus and system for eliminating deposit of atoms on Zeeman cooling window
  • Method, apparatus and system for eliminating deposit of atoms on Zeeman cooling window

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Embodiment Construction

[0048] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0049] Normally, atoms are in the ground state of a low energy level. When the photon incident on the atom resonates with the atom, the atom will absorb the photon and make a transition from a low energy level to a high energy level. If the upper energy level after the atomic transition is not stable, the atom will radiate a photon and return to the lower energy level. The frequency of atoms spontaneously emitting photons is fixed, and the outgoing direction of photons is random. Then after an absorption-radiation process, the speed of the atoms will have a certain change.

[0050] An atom moving with a velocity V, and a momentum of The photon resonance of , following the law of conservation of momentum after absorbing...

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Abstract

The present invention discloses a method, an apparatus and a system for eliminating the deposit of atoms on a Zeeman cooling window in a strontium atom optical clock. A strontium atom optical clock system is provided with, in a linear order along the direction of the atomic beam, an atomic pile which emits the atomic beam, a magneto-optical trap which confines the atoms and the Zeeman cooling window. In at least one area of the zones from an emission port of the atomic pile to the Zeeman cooling window, excluding the magneto-optical trap, the resonance light of to-be-removed atoms is used to irradiate the motion path of the atoms along a direction at an angle with the motion path of the strontium atom beam so that the atoms cannot reach the Zeeman cooling window. The present invention creates transverse velocity of the atoms through irradiation to prevent the atoms from reaching the Zeeman cooling window, effectively eliminating the deposit of the atoms on the glass of the Zeeman cooling window in an atomic optical clock system and maintaining the high transparency of the window glass.

Description

technical field [0001] The invention relates to the technical field of atomic optical clocks, in particular to a method, device and system for removing atoms deposited in a Zeeman cooling window in a strontium atomic optical clock. Background technique [0002] At present, the international time and frequency standard is provided by the cesium (Cs) atomic fountain clock, and the optical clock made of strontium (Sr) atoms has higher accuracy and stability, so the atomic optical clock is currently the world's research hotspot. [0003] The structure of the atomic optical clock system is as follows figure 1 shown. The strontium element is placed in the atomic furnace 101, and there is a collimating device 102 in the atomic furnace. When the atomic furnace is heated, the atoms are ejected from the atomic furnace in the form of a beam, and after passing through the Zeeman reducer 103, they are formed by the magnetic field and six beams of light. The trapping is carried out in ...

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Application Information

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IPC IPC(8): G04F5/14
Inventor 方占军王强王少凯王民明孟飞林百科
Owner NAT INST OF METROLOGY CHINA
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