摘要
根据光磁共振原理,通过光抽运,形成原子的能级分布偏极化,再加入射频信号打破塞曼能级偏极化分布,形成并输出光磁共振信号。然后,同时改变扫场和水平磁场方向,调节水平电流大小,再次获得光磁共振信号。根据2次测得的水平亥姆霍兹线圈电流,计算等效磁感强度。由仪器的垂直电流,计算地磁场垂直分量。二者合成,即可得出当地磁感强度。改进后,此方法克服了以往先测定朗德因子再测定地磁场的缺点。
According to the principle of optical-magnetic resonance,polarized distribution of atoms at Zeeman 's energy levels is formed by optical-pumping with the corresponding in stru-ment.Some optical-magnetic resonance signals are formed and displayed by adding radio fre-quency-signal to break the polarized distribution.Then change the directions of sweeping field and horizontal magnetic field,the resonance signals can be obtained again by adjusting the horizontal current.The equivalent magnetic induction can be calculated with the two cur rents in Helmholtz ' coil.The vertical component of terrestrial magnetic field can be got with the vertical current.At last,the native magnetic induction is determined by composing the two components.This method overcomes the weak point of the previous method in which one must measure the Lande factor before dealing with the magnetic field.
出处
《中国民航学院学报》
2002年第4期20-22,共3页
Journal of Civil Aviation University of China
关键词
射频频率
等效磁感强度
光磁共振
测量
地磁场
optical-magnetic resonance
resonance current
terrestrial magnetic field
