Automatic compensation of magnetic field for a rubidium space cold atom clock
Li Lin, Ji Jingwei, Ren Wei, Zhao Xin, Peng Xiangkai, Xiang Jingfeng, Lü Desheng†, , Liu Liang‡,
       

(a) The fluctuation of magnetic field in the Ramsey cavity suppressed by linear compensation. Black: measured C-field; blue: C-field calculation from the magnetic field at fluxgate; red: the residual magnetic field. (b) The incremental compensation of the fluctuation of magnetic field in the Ramsey cavity. Blue: the residual magnetic field compensated after the linear compensation; black: the magnetic field compensated after the incremental compensation; red: the incremental field CFn−CF(n−1).