Chip-type atom gravimeter and method of gravimeter for measuring gravity

Abstract

The invention discloses a chip-type atom gravimeter and a method of the gravimeter for measuring gravity. The gravimeter comprises an atom chip, a glass vacuum chamber, an ion pump, a current feedthrough, a vacuum valve and a four-way connector, wherein four openings of the four-way connector are connected with the glass vacuum chamber, the ion pump, the current feedthrough and the vacuum valve respectively; the atom chip is connected with the glass vacuum chamber; and a wire structure on the atom chip comprises a first wire in an x direction, a second wire, a third wire, a first coplanar micro waveguide and a second coplanar micro waveguide; the second wire and the third wire are in a y direction; and the first coplanar micro waveguide and the second coplanar micro waveguide are in the x direction. The method comprises the steps that the surface of the atom chip generates a three-dimensional atom trapped potential well; cold atoms are loaded into the trapped potential well; the cold atoms with different inner forms are separated and merged in a one-dimensional waveguide by the two coplanar micro waveguides; and the speed of the gravity is calculated according to interference fringes. The gravimeter is convenient to carry, very high in sensitivity and wide in application prospect; and the integral time of the gravimeter is not determined by the length of a space.

Description

technical field [0001] The invention relates to a gravimeter and a method for measuring gravity thereof, in particular to a chip type atomic gravimeter and a method for measuring gravity thereof, belonging to the technical field of gravity measurement. Background technique [0002] At present, the gravimeters used for gravity measurement mainly include mechanical and electrostatic gravimeters, as well as the recently developed cold atom interference gravimeter. The principle of cold atom interference gravimeter is to use the change of interference fringes caused by gravity to measure gravity: [0003] ΔΦ=2k Raman gτ [0004] Among them, k Raman is the Raman light wave vector, τ is the integration time between two Raman pulses, and g is the gravity to be measured. [0005] The accuracy of the cold atomic gravimeter can reach 10- 11 g / Hz 1 / 2 , is currently the most accurate gravity measuring instrument. However, the shortcomings and shortcomings of the widely used fount...

AI Technical Summary

Problems solved by technology

However, the shortcomings and shortcomings of the widely used fountain-type atomic gravity instrument are that the whole structure is huge and complex, and it is often difficult to realize practical application.

Images