Apparatus and method for measuring temperature distribution in alkali metal air chamber of atom magnetometer

Abstract

The invention discloses an apparatus for measuring temperature distribution in an alkali metal air chamber of an SERF atom magnetometer. The apparatus comprises a light source system, a heating system, the alkali metal air chamber and a signal detection system, wherein the light source system is used for generating laser for measuring the temperature distribution in the alkali metal air chamber and comprises a laser, a lambda / 2 wave plate, a PBS, a coupler, an NPBS, diaphragms and a reflective mirror; the heating system is used for heating the alkali metal air chamber; alkali metal atoms, inert gases and buffer gases are packaged in the alkali metal air chamber; and the signal detection system is used for detecting signals representing the temperature distribution in the alkali metal air chamber and comprises two photoelectric detectors, an optical chopper, two lock-in amplifiers and an oscilloscope. The invention further discloses a method for measuring temperature distribution and thermal stability time in an alkali metal air chamber. According to the invention, a simple, effective and quite-high-precision measurement scheme is provided for evaluating the temperature distribution condition and the thermal stability time in the alkali metal air chamber for the SERF atom magnetometer, and a theoretical reference is provided for improving the sensitivity of the SERF atom magnetometer.

Description

technical field [0001] The invention relates to a measuring device and method suitable for temperature distribution in an alkali metal gas chamber of a SERF atomic magnetometer, belonging to the technical fields of optical detection and temperature detection. Background technique [0002] Magnetic fields exist widely in nature, and the precise detection of extremely weak magnetic fields will help researchers in various fields discover new phenomena and explore new mechanisms. In recent years, with the rapid development of quantum manipulation technology, photoelectric detection technology and quantum sensing technology, the use of atomic spin effect to measure magnetic field has become a new development direction. Ultra-sensitive quantum sensors, such as superconducting quantum interferometers, proton magnetometers, optically pumped magnetometers, and nuclear magnetic resonance magnetometers, have emerged as the times require. Among these quantum magnetometers, atomic magne...

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Problems solved by technology

However, the research on the temperature, especially the distribution of the temperature in the alkali metal gas chamber and the thermal equilibrium time is not comprehensive and in-depth. At present, there are no relevant literature and public reports.

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