Evaluation of blackbody radiation shift with temperature-associated fractional uncertainty at 10−18 level for 40Ca+ ion optical clock
Evaluation of blackbody radiation shift with temperature-associated fractional uncertainty at 10−18 level for 40Ca+ ion optical clock
复制标题
40Ca 离子光钟 10-18 级黑体辐射位移与温度相关分数不确定度的评估
DOI：
10.1088/1361-6455/50/1/015002
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发表时间：
2016-09
期刊：
影响因子：
--
通讯作者：
X.Huang
中科院分区：
文献类型：
--
作者：
P.Zhang;J.Cao;H.Shu;J.Yuan;J.Shang;K.Cui;S.Chao;S.Wang;D.Liu;X.Huang
在本文中，通过有限元法（FEM）建模评估了被限制在微型保罗陷阱中的 40Ca+ 离子所经历的黑体辐射（BBR）温升及其不确定性。通过与虚拟陷阱上多个点的热像仪测量结果进行比较，对 FEM 模型进行了验证。在验证之前，使用PT1000热电阻温度计对热像仪进行了校准。仔细分析输入的建模参数，并使用经过验证的有限元模型评估它们对陷阱环境温度不确定性的贡献。结果表明，40Ca+离子经历的温升为1.72 K，不确定度为0.46 K。这导致40Ca+离子光钟的系统不确定度贡献为2.2 mHz，对应于分数不确定度5.4 × 10−18。这比 BBR 偏移系数引起的不确定性小得多，BBR 偏移系数被评估为 4.8 mHz，在分数频率单位的 10−17 级别。
In this paper, the blackbody radiation (BBR) temperature rise experienced by a 40Ca+ ion confined in a miniature Paul trap and its uncertainty have been evaluated via finite-element method (FEM) modelling. The FEM model was validated through comparisons with thermal camera measurements at several points on a dummy trap. Before the validation, the thermal camera was calibrated by using a PT1000 resistance thermometer. The input modelling parameters were analyzed carefully, and their contributions to the uncertainty of the trap environment temperature were evaluated using the validated FEM model. The result shows that the temperature rise experienced by the 40Ca+ ion is 1.72 K with an uncertainty of 0.46 K. It results in a contribution of 2.2 mHz to the systematic uncertainty of a 40Ca+ ion optical clock, corresponding to a fractional uncertainty 5.4 × 10−18. This is much smaller than the uncertainty caused by the BBR shift coefficient, which is evaluated to be 4.8 mHz and at the 10−17 level in fractional frequency units.
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DOI：
10.1007/s00340-016-6327-x
发表时间：
2015-10
期刊：
Applied Physics B
影响因子：
--
作者：
P. Nisbet-Jones;S. King;J. M. Jones;J. M. Jones;R. Godun;C. Baynham;C. Baynham;K. Bongs;M. Doležal;P. Balling;Patrick Gill
通讯作者：
P. Nisbet-Jones;S. King;J. M. Jones;J. M. Jones;R. Godun;C. Baynham;C. Baynham;K. Bongs;M. Doležal;P. Balling;Patrick Gill
DOI：
10.1364/oe.20.022034
发表时间：
2012-08
期刊：
2013 Joint European Frequency and Time Forum & International Frequency Control Symposium (EFTF/IFC)
影响因子：
--
作者：
K. Matsubara;H. Hachisu;Ying Li;S. Nagano;C. Locke;A. Nogami;M. Kajita;K. Hayasaka;T. Ido;M. Hosokawa
通讯作者：
K. Matsubara;H. Hachisu;Ying Li;S. Nagano;C. Locke;A. Nogami;M. Kajita;K. Hayasaka;T. Ido;M. Hosokawa
DOI：
--
发表时间：
2015
期刊：
--
影响因子：
--
作者：
管桦;黄垚;刘培亮;边武;邵虎;高克林
通讯作者：
管桦;黄垚;刘培亮;边武;邵虎;高克林
影响因子：
3.5
作者：
Cui Kai-Feng;Shang Jun-Juan;Shu Hua-Lin;Huang Xue-Ren
通讯作者：
Huang Xue-Ren
影响因子：
8.6
作者：
Beloy, K.;Hinkley, N.;Ludlow, A. D.
通讯作者：
Ludlow, A. D.