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Method and device for measuring track of atomic group in atomic interferometer

A technology of atom interferometer and measuring device, which is applied in the direction of measuring device, radiation measurement, particle motion recording, etc., can solve the problem of poor accuracy of atomic group trajectory measurement, and achieve the effect of high accuracy

Active Publication Date: 2021-03-12
INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for measuring the orbit of the atomic group and introduce a device for measuring the orbit of the atomic group in order to solve the problem of poor measurement accuracy of the atomic group trajectory in the current double-loop atomic interferometer or two-component atomic interferometer

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  • Method and device for measuring track of atomic group in atomic interferometer
  • Method and device for measuring track of atomic group in atomic interferometer
  • Method and device for measuring track of atomic group in atomic interferometer

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Embodiment 1

[0059] Such as figure 1 A device for measuring the orbit of atomic groups in an atomic interferometer, including an optical system composed of an atomic interferometer physical system, a co-directional Raman laser 2 and a cooling laser 13, and a circuit system composed of a photodetector and the like.

[0060] The atomic interferometer physical system includes a vacuum chamber 7 and an atom cooling chamber 701 , an atom interference chamber 702 and an atom detection chamber 703 sequentially arranged in the vacuum chamber 7 .

[0061] The atom cooling cavity 701 and the atom interference cavity 702 communicate with each other, and the atom interference cavity 702 and the atom detection cavity 703 communicate with each other.

[0062] An alkali metal releasing agent is arranged in the vacuum chamber 7 .

[0063] The magnetic field required by the magneto-optical trap is formed in the atom cooling cavity 701 through the reverse Helmholtz coil; the cooling region is formed in the...

Embodiment 2

[0070] A method for measuring the trajectory of atomic groups in an atomic interferometer, utilizing the measuring device for the trajectory of atomic groups in an atomic interferometer described in Embodiment 1, comprising the following steps:

[0071] Step 1. Turn on the magneto-optical trap cooling laser, Raman laser and reverse Helmholtz coil current to preheat for at least half an hour. Heating the alkali metal release agent diffuses the alkali metal atoms into the atomic cooling chamber 701 of the vacuum chamber 7;

[0072] Step 2, turn on the current of the gradient magnetic field coil 10 in the z direction, and adjust the magnitude and direction of the current to generate a magnetic field B in the z direction z , the magnetic field B in the z direction in this step z Consists of two parts, one part is the bias magnetic field B in the z-axis direction 0 , the other part is the gradient magnetic field in the z-axis direction, and the currents of the gradient magnetic f...

Embodiment 3

[0098] Embodiment 2 is further optimized. In Embodiments 1 and 2, one end of the vacuum chamber 7 is an atom cooling chamber 701 and the other end is an atom detection chamber 703 . The atom interference chamber 702 is located between the atom cooling chamber 701 and the atom detection chamber 703 .

[0099] In this embodiment, before the alkali metal atomic groups 11 are projected along the parabolic trajectory 12, the two ends of the vacuum chamber 7 are atomic cooling chambers 701, and after the alkali metal atomic groups 11 are projected along the parabolic trajectory 12, the two ends of the vacuum chamber 7 are atom detection chambers 703.

[0100] In step 3, the reverse Helmholtz coil forms the magnetic field required by the magneto-optical trap at both ends of the vacuum chamber 7, and the cooling laser 13 emitted by the magneto-optical trap cooling laser forms a cooling region at both ends of the vacuum chamber 7 and The alkali metal atomic groups 11 in the cooling regi...

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Abstract

The invention discloses a method for measuring the track of an atomic group in an atomic interferometer. According to the method, the position of the atomic group in the three-dimensional direction can be measured, the track measurement precision can be improved, no additional device is added on the basis of a separated three-pulse atomic interferometer in the measurement process, the operation issimple, and the measurement process can be simplified. The invention further discloses a device for measuring the track of the atomic group in the atomic interferometer. The device comprises a physical system composed of a vacuum cavity, a magnetic field coil and the like, an optical system composed of Raman laser, cooling laser and the like, and a circuit system composed of a photoelectric detector and the like. The method and device can be applied to the field of atomic inertia measurement, and the performance of the atomic interferometer is improved.

Description

technical field [0001] The invention relates to the technical field of cold atom interference, more specifically to a method for measuring the track of atomic groups in an atomic interferometer, and also to a device for measuring the track of atomic groups in the atomic interferometer. The invention is applicable to the field of atomic interferometer quantum sensing, and can also be used to improve the measurement accuracy of quantum sensing devices based on atomic interferometer. Background technique [0002] In a double-loop atomic interferometer or a two-component differential atomic interferometer, in order to obtain a common mode effect, the trajectories of the two groups of alkali metal atomic groups being manipulated should coincide, which can eliminate the common noise effects, such as stray magnetic fields, vibrations, Wavefront et al. Therefore, the precise measurement and calibration of atomic group trajectories in atomic interferometers is one of the most import...

Claims

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Application Information

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IPC IPC(8): G01T5/00
CPCG01T5/002G01T5/006
Inventor 陈红辉姚战伟鲁思滨李润兵陆泽茜陈小莉蒋敏余庚华罗军王谨詹明生
Owner INNOVATION ACAD FOR PRECISION MEASUREMENT SCI & TECH CAS
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