Outer temperature control and magnetic shielding device for rubidium atomic frequency standard

Abstract

The invention discloses a temperature control and magnetic screen device for a rubidium atomic frequency standard. An outer magnetic screen bottom plate is mounted on the upper surface of the temperature control bottom plate, and a magnetic screen covers the temperature control bottom plate and is fixed on the side surface of the temperature control bottom plate; a heating film is fixed below theouter temperature control bottom plate through silica gel; a thermistor is embedded into a hole of the external temperature control bottom plate; leads of the heating film and the thermistor are connected with the temperature control circuit; the heat conduction gasket is mounted between the outer temperature control bottom plate and the complete machine bottom plate through screws; and the temperature control circuit can be mounted on the temperature control bottom plate. According to the design of the device, on the premise that effective heat dissipation of the core assembly can be ensured,the stable environment temperature and the excellent magnetic shielding effect are provided for a physical system and a sensitive circuit assembly of the rubidium atomic frequency standard, so that the temperature sensitivity and the magnetic sensitivity of the rubidium atomic frequency standard are further overcome, all the assemblies are firmly installed, the anti-seismic requirement is met, and finally the long-term stability level of the rubidium atomic frequency standard can be remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of atomic frequency standards, and more specifically relates to a temperature control and magnetic shielding device for the outer layer of a rubidium atomic frequency standard. ). Background technique [0002] The rubidium atomic frequency standard is an important time reference device, which is mainly composed of a physical system and a circuit system as a frequency discriminator. The physical system is mainly composed of a spectrum lamp and a cavity bubble system, in which the rubidium atomic frequency standard working material metal 87 Rb is in the absorption bubble of the cavity system, 87 The transition frequency of the ground state (0,0) of the Rb atom is the frequency reference of the rubidium atomic frequency standard. The circuit system mainly includes a microwave link and a servo circuit. The function of the microwave is to synthesize the 10MHz signal output by the voltage-controlled crystal osc...

AI Technical Summary

Problems solved by technology

[0004] In the traditional general civilian rubidium atomic frequency standard, there is no outer magnetic shield and temperature control structure, the temperature coefficient is large, it is easily affected by the external magnetic field, and the index is low

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