Loss of cold atoms due to collisions with residual gases in free flight and in a magneto-optical trap

doi:10.1088/1674-1056/27/7/073701

Abstract

The loss rate of cold atoms in a trap due to residual gas collisions differs from that in a free state after the cold atoms are released from the trap. In this paper, the loss rate in a cold rubidium-87 atom cloud was measured in a magneto-optical trap (MOT) and during its free flight. The residual gas pressure was analyzed by a residual gas analyzer, and the pressure distribution in a vacuum chamber was numerically calculated by the angular coefficient method. The decay factor, which describes the decay behavior of cold atoms due to residual gas collisions during a free flight, was calculated. It was found that the decay factor agrees well with theoretical predictions under various vacuum conditions.

Keywords: atom traps atomic and molecular collision residual gas

Received: 26 March 2018
Revised: 23 April 2018
Accepted manuscript online:

PACS:	37.10.Gh	(Atom traps and guides)
	34.50.Cx	(Elastic; ultracold collisions)
	07.30.Bx	(Degasification, residual gas)

Fund:

Project supported by the Ministry of Science and Technology of China (Grant No. 2013YQ09094304).

Corresponding Authors: De-Sheng Lü, Liang Liu
E-mail: dslv@siom.ac.cn;liang.liu@siom.ac.cn

Cite this article:

Jing-feng Xiang(项静峰), He-nan Cheng(程鹤楠), Xiang-kai Peng(彭向凯), Xin-wen Wang(王新文), Wei Ren(任伟), Jing-wei Ji(吉经纬), Kang-kang Liu(刘亢亢), Jian-bo Zhao(赵剑波), Lin Li(李琳), Qiu-zhi Qu(屈求智), Tang Li(李唐), Bin Wang(汪斌), Mei-feng Ye(叶美凤), Xin Zhao(赵鑫), Yuan-yuan Yao(姚媛媛), De-Sheng Lü(吕德胜), Liang Liu(刘亮) Loss of cold atoms due to collisions with residual gases in free flight and in a magneto-optical trap 2018 Chin. Phys. B 27 073701

[1]	Monroe C, Swann W, Robinson H and Wieman C 1990 Phys. Rev. Lett. 65 1571
[2]	Lindquist K, Stephens M and Wieman C 1992 Phys. Rev. A 46 4082
[3]	Santarelli G, Laurent Ph, Lemonde P, Clairon A, Mann A G, Chang S, Luiten A N and Salomon C 1999 Phys. Rev. Lett. 82 4619
[4]	Ramsey N F 1950 Phys. Rev. 78 695
[5]	Wang Q, Lin Y G, Li Y, Lin B K, Meng F, Zang E J, Li T C and Fang Z J 2014 Chin. Phys. Lett. 31 123201
[6]	Li W F, Du J J, Wen R J, Li G and Zhang T C 2015 Chin. Phys. Lett. 32 104210
[7]	Zhang F, Long Y, Yang J L, Ma G Q, Yin J P and Wang R Q 2015 Chin. Phys. Lett. 32 123701
[8]	Raab E L, Prentiss M, Cable A, Chu S and Pritchard D E 1987 Phys. Rev. Lett. 59 2631
[9]	Prentiss M, Cable A, Bjorkholm J E, Chu S, Raab E L and Pritchard D E 1988 Opt. Lett. 13 452
[10]	Bjorkholm J E 1988 Phys. Rev. A 38 1599
[11]	Bali S, O'Hara K M, Gehm M E, Granade S R and Thomas J E 1999 Phys. Rev. A 60 R29
[12]	Van Dongen J, Zhu C, Clement D, Dufour G, Booth J L and Madison K W 2011 Phys. Rev. A 84 022708
[13]	Makhalov V B, Martiyanov K A and Turlapov A V 2016 Metrologia 53 1287
[14]	Simon E, Laurent P, Santarelli G, Clairon A, Lemonde P, Salomon C, Dimarcq N, Petit P, Audoin C, Gonzalez F and Changeart F J 1997 Acta Astronautica 40 837
[15]	Lü D S, Wang B, Li T and Liu L 2010 Chin. Opt. Lett. 8 735
[16]	Kulas S, Vogt C, Resch A, et al. 2017 Microgravity Science and Technology 29 37
[17]	Arpornthip T, Sackett C A and Hughes K J 2012 Phys. Rev. A 85 033420
[18]	Margenau H and Kestner N R 1971 Theory of Intermolecular Forces (New York:Pergamon Press)
[19]	Miller J D, Cline R A and Heinzen D J 1993 Phys. Rev. A 47 R4567
[20]	Vuletić V, Chin C, Kerman A J and Chu S 1998 Phys. Rev. Lett. 81 5768
[21]	Tollett J J, Bradley C C, Sackett C A and Hulet R G 1995 Phys. Rev. A 51 R22
[22]	Monroe C R, Cornell E A, Sackett C A, Myatt C J and Wieman C E 1993 Phys. Rev. Lett. 70 414
[23]	Landau L D and Lifshits E M 1977 Quantum Mechanics:Non-Relativistic Theory (Course of Theoretical Physics vol. 3) (3rd Edn.) (New York:Pergamon Press)
[24]	Child M S 1996 Molecular Collision Theory (New York:Courier Corporation)
[25]	Cambi R, Cappelletti D, Liuti G and Pirani F 1991 The Journal of Chemical Physics 95 1852
[26]	Koutselos A D and Mason E A 1986 The Journal of Chemical Physics 85 2154
[27]	Ren W, Gao Y C, Li T, Lü D S and Liu L 2016 Chin. Phys. B 25 060601
[28]	Ren W, Xiang J F, Zhang Y T, Wang B, Qu Q Z, Zhao J B, Ye M F, Lü D S and Liu L 2015 Vacuum 116 54
[29]	Qu Q Z, Wang B, Lü D S, Zhao J B, Ye M F, Ren W, Xiang J F and Liu L 2015 Chin. Opt. Lett. 13 061405
[30]	Wang B, Lü D S, Qu Q Z, Zhao J B, Li T, Liu L and Wang Y Z 2011 Chin. Phys. Lett. 28 063701
[31]	Lü D S, Qu Q Z, Wang B, Zhao J B, Liu L and Wang Y Z 2011 Chin. Phys. Lett. 28 063201
[32]	Li L, Qu Q Z, Wang B, Li T, Zhao J B, Ji J W, Ren W, Zhao X, Ye M F, Yao Y Y, Lü D S and Liu L 2016 Chin. Phys. Lett. 33 063201
[33]	Haw M, Evetts N, Gunton W, Van Dongen J, Booth J L and Madison K W 2012 J. Opt. Soc. Am. B 29 475
[34]	Gensemer S D, Sanchez-Villicana V, Tan K Y N, Grove T T and Gould P L 1997 Phys. Rev. A 56 4055
[35]	Yuan J P, Ji Z H, Zhao Y T, Chang X F, Xiao L T and Jia S T 2013 Appl. Opt. 52 6195

[1]	Residual gas properties in field emission device with ZnO emitters Wang Jin-Chan (王金婵). Chin. Phys. B, 2013, 22(6): 068504.
[2]	Ab initio calculation on accurate analytic potential energy functions and harmonic frequencies of c³$\Sigma$⁺_g and B¹$\Pi$_u states of dimer ⁷Li₂ Yu Ben-Hai(余本海), Shi De-Heng(施德恒), Sun Jin-Feng(孙金锋), Zhu Zun-Lue(朱遵略), Liu Yu-Fang(刘玉芳), and Yang Xiang-Dong(杨向东). Chin. Phys. B, 2007, 16(8): 2371-2377.
[3]	A modification potential method of calculating total cross sections of electrons scattering from complex molecules C₂H₆, C₂F₆,C₆H₆ and C₆F₆ at 100eV--5000eV Shi De-Heng (施德恒), Sun Jin-Feng (孙金锋), Zhu Zun-Lue (朱遵略), Liu Yu-Fang (刘玉芳), Yang Xiang-Dong (杨向东). Chin. Phys. B, 2006, 15(6): 1278-1283.
[4]	Ab initio calculation on the analytic potential energy functions for the state a³Σ⁺_u and the state b³$\Pi$_u of spin-aligned trimer ⁷Li₂ Shi De-Heng (施德恒), Sun Jin-Feng (孙金锋), Yang Xiang-Dong (杨向东), Zhu Zun-Lue (朱遵略), Liu Yu-Fang (刘玉芳). Chin. Phys. B, 2005, 14(8): 1566-1570.
[5]	Positron total cross sections for collisions with O₂, H₂O and CH₄ in energy range from 30 to 3000eV Shi De-Heng (施德恒), Liu Yu-Fang (刘玉芳), Sun Jin-Feng (孙金锋), Zhu Zun-Lue (朱遵略), Yang Xiang-Dong (杨向东). Chin. Phys. B, 2005, 14(5): 964-968.
[6]	Total cross sections for electrons scattering from simple molecules containing the larger atom sulfur at 30--5000eV Shi De-Heng (施德恒), Liu Yu-Fang (刘玉芳), Sun Jin-Feng (孙金锋), Yang Xiang-Dong (杨向东), Zhu Zun-Lue (朱遵略). Chin. Phys. B, 2005, 14(11): 2208-2213.
[7]	A modification potential method for electron scattering total cross section calculations on several molecules at 30-5000eV Shi De-Heng (施德恒), Sun Jin-Feng (孙金锋), Zhu Zun-Lue (朱遵略), Liu Yu-Fang (刘玉芳). Chin. Phys. B, 2005, 14(1): 120-127.
[8]	Total cross sections for scattering of electrons from O₂, H₂O, H₂, O₃, CO and CO₂ at 100－2000eV Shi De-Heng (施德恒), Sun Jin-Feng (孔金锋), Yang Xiang-Dong (杨向东), Zhu Zun-Lue (朱遵略), Liu Yu-Fang (刘玉芳). Chin. Phys. B, 2004, 13(7): 1018-1024.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

Loss of cold atoms due to collisions with residual gases in free flight and in a magneto-optical trap

Cite this article:

Online attention