| 离子-原子混合阱中冷Rb原子对Rb+离子的协同冷却 |
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| 作者姓名： | 吕双飞 贾凤东 李晓康 刘晋允 许翔源 薛平 钟志萍 |
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| 作者单位： | 1. 中国科学院大学物理科学学院, 北京 100049;
2. 清华大学物理系低维量子物理国家重点实验室, 量子物质科学协同创新中心, 北京 100084;
3. 首都师范大学物理系, 北京 100037 |
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| 基金项目： | Supported by Beijing Natural Science Foundation(1164016), National Natural Science Foundation of China(11604334, 61227807, 61575108), and Tsinghua Initiative Scientific Research Program (2013THZ02-3) |
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| 摘 要： | 研究在离子-原子混合阱中冷Rb原子对Rb+离子的协同冷却效应。通过对与原子相互作用之后离子温度和数目的测量研究离子阱参数q1，2对协同冷却的影响。发现在0.3≤q1，2≤0.8时冷原子对离子具有明显的协同冷却效果。选取｜q1，2｜=0.32，测量到离子可以从初始温度（2 010±380）K冷却至（325±35）K，寿命从7s延长至15s。这对于冷却原子离子或者分子离子，尤其是没有合适光学通道的离子将是非常有意义的。
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| 关 键 词： | 协同冷却 离子-原子碰撞 离子-原子混合阱 |
| 收稿时间： | 2017-03-01 |
| 修稿时间： | 2017-04-12 |
Sympathetic cooling of Rb+ ions by cold Rb atoms in an ion-neutral hybrid trap |
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| Authors: | L&# Shuangfei JIA Fengdong LI Xiaokang LIU Jinyun XU Xiangyuan XUE Ping ZHONG Zhiping |
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| Institution: | 1. School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China;
2. State Key Laboratory of Low-dimensional Quantum Physics, and Collaborative Innovation Center of Quantum Matter, Department of Physics, Tsinghua University, Beijing 100084, China;
3. Department of Physics, Capital Normal University, Beijing 100037, China |
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| Abstract: | Sympathetic cooling of Rb+ ions by cold Rb atoms is studied in an ion-neutral hybrid trap. The effect of a linear Paul trap (LPT) parameter q1,2 on the sympathetic cooling is studied by measuring the changes in ion number Ni and temperature Ti after interaction with cold atoms. The sympathetic cooling effect is observed with 0.3 ≤ |q1,2| ≤ 0.8. At the |q1,2| value of 0.32, ions are cooled from initial (2 010±380) K to (325±35) K and the lifetime of ions is extended from 7 s to 15 s via sympathetic cooling. These findings are very useful for cooling of atomic and molecular ions, especially for the ions without available optical channels. |
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| Keywords: | sympathetic cooling ion-atom collisions ion-neutral hybrid trap |
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