A method of accurately determining temperature of cold atomic cloud in atomic fountain

doi:10.7498/aps.68.20190115

NTSC-IR

	A method of accurately determining temperature of cold atomic cloud in atomic fountain
	Shi Jun-Ru 1,2,3; Wang Xin-Liang1,2 ; Guan Yong 1,2,3; Ruan Jun 1,2; Liu Dan-Dan 1,2; Bai Yang 1,2; Yang Fan 1,2,3; Zhang Hui 1,2,3; Yu Feng-Xiang 1,2,3; Fan Si-Chen 1,2,3; Zhang Shou-Gang 1,2
	2019-10-05
发表期刊	ACTA PHYSICA SINICA
ISSN	1000-3290
卷号	68 期号:19 页码:6
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.
关键词	knife-edge method cold atomic cloud Gaussian radius cold atomic cloud's temperature
资助者	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
DOI	10.7498/aps.68.20190115
关键词[WOS]	TRAP
语种	英语
资助项目	National Key R&D Program of China[2016YFF0200202]
资助者	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
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000489563400003
出版者	CHINESE PHYSICAL SOC
引用统计
文献类型	期刊论文
条目标识符	http://210.72.145.45/handle/361003/12004
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.