波谱学杂志2024，Vol.41Issue(3)：331-340,10.DOI:10.11938/cjmr20243089
氦气渗透导致铷原子钟频率漂移的计算与分析
Calculation and Analysis of Helium-permeation-induced Frequency Drift of the Rubidium Atomic Clock
摘要
Abstract
Due to the collision-shift effect,helium permeation into the vapor cell causes a time-dependent frequency drift in rubidium atomic clock.To quantify this shift,a cylindrical vapor cell with dimensions of 1.8 cm in diameter,1.6 cm in height,and 1 mm in thickness,operating at a temperature of 65 ℃,is selected for analysis.Numerical methods are employed to simulate the temporal variation of helium gas pressure within atomic vapor cells composed of Pyrex(Corning 7740)and low helium-permeable aluminosilicate(Corning 1720).The results of the calculations indicate that for Pyrex vapor cells,after 12 years of operation,the drift rate attributable to helium permeation decreases to less than 1.0×10-14/day.In contrast,the frequency drift rate due to helium permeation in aluminosilicate vapor cell rubidium atomical clocks remains below 3.0× 10-17/day throughout their operational lifetime,rendering its contribution to the drift rate negligible.This computational approach is also applicable to the investigation of the permeation processes of other gaseous species in various glass materials.关键词
氦气渗透/铷原子钟/频率漂移/原子气泡/派热克斯玻璃/铝硅酸盐玻璃Key words
helium permeation/rubidium atomic clock/frequency drift/vapor cell/Pyrex/aluminosilicate分类
数理科学引用本文复制引用
李豆,王鹏飞,钟达,梅刚华,康松柏..氦气渗透导致铷原子钟频率漂移的计算与分析[J].波谱学杂志,2024,41(3):331-340,10.基金项目
国家自然科学基金资助项目(12173064). （12173064）
