High-voltage measurements on the 5 ppm relative uncertainty level with collinear laser spectroscopy
High-voltage measurements on the 5 ppm relative uncertainty level with collinear laser spectroscopy
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DOI：
10.1088/1681-7575/aaabe0
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发表时间：
2018-04-01
期刊：
影响因子：
2.4
通讯作者：
Noertershaeuser, W.
中科院分区：
文献类型：
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作者：
Kraemer, J.;Koenig, K.;Noertershaeuser, W.
我们给出了利用泵浦和探测方案，在涉及三维D-2(5/2)亚稳态的Ca-40(+)的4s S-2(1/2)->；4p P-2(3/2)跃迁的5ppm相对不确定度水平上的高压共线激光光谱测量结果。通过两级激光相互作用和参考测量，我们可以消除由于不同电极材料和热电电压引起的接触电势差异，以及离子源中离子的未知起始电势等系统效应。电压测量在-5千伏至-19千伏之间进行，并以具有相对不确定度为5ppm的稳定高压分流器的平行测量作为参考。我们的测量符合高压分路器的不确定度限制，并显示出基于激光的直接高压测量的精度有了前所未有的提高(20倍)。
We present the results of high-voltage collinear laser spectroscopy measurements on the 5 ppm relative uncertainty level using a pump and probe scheme at the 4s S-2(1/2) -> 4p P-2(3/2) transition of Ca-40(+) involving the 3d D-2(5/2) metastable state. With two-stage laser interaction and a reference measurement we can eliminate systematic effects such as differences in the contact potentials due to different electrode materials and thermoelectric voltages, and the unknown starting potential of the ions in the ion source. Voltage measurements were performed between -5 kV and -19 kV and parallel measurements with stable high-voltage dividers calibrated to 5 ppm relative uncertainty were used as a reference. Our measurements are compatible with the uncertainty limits of the high-voltage dividers and demonstrate an unprecedented (factor of 20) increase in the precision of direct laser-based high-voltage measurements.