一种碱金属镀膜气室的气压测量方法及装置
By generating an axial first-order magnetic field gradient and Langevin diffusion model in an alkali metal coated gas chamber, and combining relaxation time calculation, the problem of non-destructive gas pressure measurement was solved, and higher-precision gas pressure measurement was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- PEKING UNIV
- Filing Date
- 2023-07-19
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, measuring the air pressure in an alkali metal coating gas chamber requires breaking the chamber's seal, which damages the chamber and makes it impossible to achieve accurate air pressure measurement without causing damage.
By using a pre-constructed alkali metal coated gas cell magnetic resonance linewidth measurement system, axial first-order magnetic field gradients with different DC voltage amplitudes are generated. Combining the Langevin diffusion model and relaxation time calculation formula, quadratic function fitting and probability density solution are performed using the relationship between magnetic resonance signal linewidth and axial first-order gradient to calculate the alkali metal atom diffusion coefficient and background gas pressure.
This technology enables pressure measurement without breaking the alkali metal coated gas chamber, improving the convenience and accuracy of pressure measurement.
Smart Images
Figure CN116952448B_ABST