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Measuring method for quantity of driven rubidium atom frequency standard residual magnetic field

A rubidium atomic frequency standard and atomic frequency standard technology, which is applied in the field of measurement and detection of passive rubidium atomic frequency standard cavity bubble system, can solve the problems that the size of the residual magnetic field of the whole system cannot be measured, and the change of the whole machine index cannot be measured.

Inactive Publication Date: 2010-09-22
JIANGHAN UNIVERSITY
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Problems solved by technology

At present, in the field of passive atomic frequency standard technology, it is impossible to measure the residual magnetic field of the whole system more accurately. Due to the existence of the residual magnetic field, the change of the residual magnetic field size and direction caused by the change of the external environment causes Metric changes are also not measurable

Method used

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  • Measuring method for quantity of driven rubidium atom frequency standard residual magnetic field
  • Measuring method for quantity of driven rubidium atom frequency standard residual magnetic field
  • Measuring method for quantity of driven rubidium atom frequency standard residual magnetic field

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Embodiment Construction

[0036] I 1 , I 2 In the middle, the interference of the switching value will inevitably cause the I 1 , I 2 The absolute values ​​are not exactly equal, where I 1 =1.81680, I 2=1.81765, using formula (4) to convert to the corresponding magnetic induction intensity H I1 、H I2 . The difference frequency value F measured by the frequency stability tester 1 -F 2 =1E-11 (where F 1 =-1.61411E-8, F 2 =-1.61518E-8) reflects the change in the direction of the current in the C field, which causes the change in the atomic transition frequency to be fed back to the frequency variation of the crystal oscillator (VCXO) through the servo loop, and has a conversion relationship: f 1 =F 1 × f 0 , f 2 =F 2 × f 0 .

[0037] according to figure 1 , according to vector addition and subtraction:

[0038] H Σ = ( H I 1 ...

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Abstract

The invention discloses a measuring method for the quantity of a driven rubidium atom frequency standard residual magnetic field. The measuring method comprises the following steps of: applying a positive direction C field to an atom frequency standard cavity-cell system and measuring a resonance frequency F1 when an external magnetic field corresponding to the positive direction C field H1 is H1; and applying a reverse direction C field to the atom frequency standard cavity-cell system, measuring a resonance frequency F2 when the external magnetic field corresponding to the reverse directionC field -H1 is -H1 and indirectly acquiring the quantity of a corresponding residual magnetic field by comparing the difference frequency data of the resonance frequency F1 and the resonance frequency F2. By using the method, the quantity of the residual magnetic field in the atom frequency standard system can be better known, and more important, a reference for further improving the stability ofthe atom frequency standard whole frequency is convenient to provide after the influence of the change of the residual magnetic field on whole indexes and the influence quantity of the quantity and the change of the residual magnetic field on the whole indexes are known.

Description

technical field [0001] The invention belongs to the measurement and detection technology of a cavity bubble system of a passive rubidium atomic frequency standard, and in particular relates to a method for measuring the residual magnetic field in the cavity bubble system of a passive rubidium atomic frequency standard. Background technique [0002] The cavity bubble system is the core component of the passive rubidium atomic frequency standard machine. It mainly includes the resonant cavity and the integrated filter resonant bubble designed to reduce the volume of the physical system, as well as the C field and Temperature control parts, etc. [0003] The resonant cavity is a microwave resonant device. Its main function is to provide a suitable microwave field for the microwave transition of the fine structure of the ground state of the 87Rb atom. Its resonant frequency is consistent with the atomic transition frequency used as a reference for quantum frequency discriminatio...

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Application Information

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IPC IPC(8): G01R33/02G01R23/14
Inventor 雷海东涂娟单清
Owner JIANGHAN UNIVERSITY
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