Magneto-optical trap device for gravity measurement

Abstract

The invention relates to a magneto-optical trap device for gravity measurement, wherein a magneto-optical trap capture area is provided on the upper part in a vacuum cavity, and an interference area and a detection area are provided on the lower part in order; a rubidium source is connected to a rubidium source angle valve, and the rubidium source angle valve and an ion pump are respectively connected by means of sealing to two obliquely arranged glass pipelines outside the vacuum cavity; a Raman mirror is set directly below the vacuum cavity; a fluorescence collection device is set at a horizontal position corresponding to the detection area outside the vacuum cavity, and two photodetectors are set at the outer side of the fluorescence collection device; first, second and third capture light are at an angle of 120 degrees in the same horizontal plane and are irradiated at the magneto-optical trap capture area in the horizontal direction; a composite beam is respectively composed of the lights at four frequencies including the capture light, detection light, Raman light and stop light in the vertical direction, wherein the capture light is reflected by the Raman mirror to form fourth and fifth capture lights, and five capture lights and a pair of reverse Helmholtz coils form a magneto-optical trap. The device can make the gravity head sensitive head compact in structure and reduced in size.

Description

technical field [0001] The invention belongs to the technical field of quantum sensor devices for precise measurement of absolute gravity acceleration, and specifically discloses a novel magneto-optical trap device for gravity measurement. Background technique [0002] In recent years, the rapid development of laser cooling and trapping technology has opened up a new perspective in the field of quantum precision measurement. Since Steven Zhu and others realized the pulsed atom interferometer in 1991, inertial measurement sensors based on cold atom interferometers have been realized one after another. Common High-precision inertial sensors include absolute gravimeters, gravity gradiometers, and gyroscopes. The cold atom gravimeter measures gravitational information through matter wave interference. The specific measurement process is: the atomic clusters after laser cooling interact with atoms through Raman light during the free fall process in the gravitational field, thereb...

AI Technical Summary

Problems solved by technology

Currently limited by environmental adaptability and isolation technology, although the cold atom interferometric gravimeter has shown high accuracy in the laboratory, its volume, power consumption, weight and environmental adaptability still cannot meet engineering applications. need

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