A Method of Measuring the Axial Secular Motion Temperature of Trapping Large Size Ion Clouds
A Method of Measuring the Axial Secular Motion Temperature of Trapping Large Size Ion Clouds
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DOI：
10.1088/0256-307x/30/3/030501
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发表时间：
2013-03
影响因子：
3.5
通讯作者：
Yang Yu-na;Liu Hao;He Yue-hong;Li Hai-Xia;Chen Yihe;S. Lei;Chen Liang;Lin Jiao-mei
中科院分区：
文献类型：
--
作者：
Yang Yu-na;Liu Hao;He Yue-hong;Li Hai-Xia;Chen Yihe;S. Lei;Chen Liang;Lin Jiao-mei
在线性离子阱中成功地捕获和操纵了大量的40Ca+云。在一系列端盖电压下测量离子云的轴向长度。提出了一种通过分析离子云在电子倍增CCD上的图像来测量离子云轴向长期运动温度的方法。该方法基于长期运动温度T下离子轴向密度分布所满足的玻尔兹曼方程。通过测量多普勒展宽谱线宽度，得到了离子云的轴向长期运动温度。在相同的俘获参数下，通过对离子云图像的分析，得到了离子的轴向长期运动温度为840 K，通过对实验共振线轮廓的拟合，得到了轴向长期运动温度为700 K。
A large cloud of 40Ca+ 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.