A method of accurately determining temperature of cold atomic cloud in atomic fountain
文献类型：期刊论文
| 作者 | Shi Jun-Ru1,2,3; Wang Xin-Liang1,2 ; Guan Yong1,2,3; Ruan Jun1,2; Liu Dan-Dan1,2; Bai Yang1,2; Yang Fan1,2,3; Zhang Hui1,2,3; Yu Feng-Xiang1,2,3; Fan Si-Chen1,2,3
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| 刊名 | ACTA PHYSICA SINICA
 |
| 出版日期 | 2019-10-05 |
| 卷号 | 68期号:19页码:6 |
| 关键词 | knife-edge method cold atomic cloud Gaussian radius cold atomic cloud's temperature |
| ISSN号 | 1000-3290 |
| DOI | 10.7498/aps.68.20190115 |
| 英文摘要 | The Gaussian radius and temperature of cold atomic cloud are important parameters in describing the state of cold atoms. The precise measuring of these two parameters is of great significance for studying the cold atoms. In this paper, we propose a new method named knife-edge to measure the Gaussian radius and temperature of the cold atomic cloud. A near-resonant and supersaturated laser beam, whose size is controlled by a knife-edge aperture, is used to push away the cold atoms in the free falling process of cold atomic cloud. By detecting the intensity of fluorescence signal, the numbers of residual atoms under different-sized near-resonant beams can be obtained. According to the characteristic of cold atoms' distribution, we construct a theoretical model to derive the Gaussian radius of cold atomic cloud from the recorded residual atom number and near-resonant beam size. Since the Gaussian radius and temperature of cold atomic cloud are associated with each other, we can finally obtain the temperature of cold atomic cloud through the recorded residual atom number and beam size. By using this method, we successfully measure the Gaussian radii of cold atomic cloud at the heights of 10 mm and 160 mm below the center of 3D-MOT (three dimensional magneto-optical trap) to be (1.54 +/- 0.05) mm and (3.29 +/- 0.08) mm, respectively. The corresponding temperature of cold atomic cloud is calculated to be (7.50 +/- 0.49) mu K, which is well consistent with the experimental result obtained by using the time-of-flight method under the same condition. This experiment is conducted on the platform of Cesium atomic fountain clock of National Time Service Center, China. |
| WOS关键词 | TRAP |
| 资助项目 | National Key R&D Program of China[2016YFF0200202] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000489563400003 |
| 出版者 | CHINESE PHYSICAL SOC |
| 资助机构 | National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China |
| 源URL | [http://210.72.145.45/handle/361003/12003]  |
| 专题 | 中国科学院国家授时中心 |
| 通讯作者 | Wang Xin-Liang |
| 作者单位 | 1.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China 2.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Xian 710600, Shaanxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shi Jun-Ru,Wang Xin-Liang,Guan Yong,et al. A method of accurately determining temperature of cold atomic cloud in atomic fountain[J]. ACTA PHYSICA SINICA,2019,68(19):6. |
| APA | Shi Jun-Ru.,Wang Xin-Liang.,Guan Yong.,Ruan Jun.,Liu Dan-Dan.,...&Zhang Shou-Gang.(2019).A method of accurately determining temperature of cold atomic cloud in atomic fountain.ACTA PHYSICA SINICA,68(19),6. |
| MLA | Shi Jun-Ru,et al."A method of accurately determining temperature of cold atomic cloud in atomic fountain".ACTA PHYSICA SINICA 68.19(2019):6. |
入库方式： OAI收割
来源：国家授时中心
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