摘要
介绍了Cs原子无自旋交换弛豫磁力仪(Cs-SERFM)的工作原理;分析了Cs泡温度105℃条件下,缓冲气体He的压强对Cs原子横向弛豫及线宽的影响,给出了惰性气体He的最佳压强为350×133.3 Pa;讨论了共振谱线的宽度与温度之间的关系,在105℃时Cs-SERFM谱线宽度仅为3.7 Hz。
A new magnetometer with Cs vapor in the spin exchange relaxation free（SERF） regime is described.Cs has a higher saturated vapor pressure than other alkali metals;so cesium SERF magnetometer is particularly attractive in applications that require lower power dissipation.Four factors affect atomic transverse relaxations in the SERF magnetometer,including collisions and diffusions among Cs,N2 and He,laser pumping and detecting processes;the buffer gas pressure of He that affects the relaxation is calculated and discussed emphatically in theory at 105 ℃,the result shows that the optimum buffer gas pressure is 350×133.3 Pa.Under the optimum pressure,the polarized spectrum linewidth as the function of the cell temperature is discussed briefly.It is found the least linewidth is only 3.7 Hz corresponding to the electric spin relaxation rate of 278 s-1 at 105 ℃.The result provides a help to increase the sensitivity of the magnetometer with Cs vapor.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2010年第6期845-847,共3页
Journal of Optoelectronics·Laser
基金
科技部国际合作资助项目(2008DFR20420)
哈尔滨工程大学基础研究基金项目(HEUFT07062)
关键词
Cs原子磁力仪
弛豫
谱线宽度
Cs vapor magnetometer
relaxation
resonance curve width
