摘要
A large cloud of ^(40)Ca^(+) is successfully trapped and manipulated in a linear ion trap.The axial length of the ion cloud is measured under a series of end-cap voltages.We propose a method of measuring the axial secular motion temperature of the ion cloud by analyzing its image on an electron-multiplying CCD.The method is based on the Boltzmann equation that the axial density distribution of ions at secular motion temperature T satisfies.The axial secular motion temperature of the ion cloud is also obtained by measuring the Doppler broadened line width.For the same trapping parameters,the axial secular motion temperature by analyzing the image of ion cloud is 840 K and by fitting the experimental resonance line profile is 700 K.
作者
YANG Yu-Na
LIU Hao
HE Yue-Hong
LI Hai-Xia
CHEN Yi-He
SHE Lei
CHEN Liang
LI Jiao-Mei
杨玉娜;柳浩;何跃宏;李海霞;陈义和;佘磊;陈亮;李交美(Key Laboratory of Atomic Frequency Standards(KLAFS),Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences,Wuhan 430071;State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Wuhan Institute of Physics and Mathematics,Chinese Academy of Sciences,Wuhan 430071;University of the Chinese Academy of Sciences,Beijing 100049)
基金
Supported by the National Natural Sciernce Foundation of China under Grant Nos 11074282,10904163.
