中国物理B ›› 2016, Vol. 25 ›› Issue (11): 113702-113702.doi: 10.1088/1674-1056/25/11/113702

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Theoretical derivation and simulation of a versatileelectrostatic trap for cold polar molecules

Shengqiang Li(李胜强)   

  1. School of New Energy and Electronic Engineering, Yancheng Teachers University, Yancheng 224002, China
  • 收稿日期:2016-04-23 修回日期:2016-06-26 出版日期:2016-11-05 发布日期:2016-11-05
  • 通讯作者: Shengqiang Li E-mail:lishengqiang2007@126.com
  • 基金资助:
    Project supported by the National Nature Science Foundation of China (Grant No. 11504318).

Theoretical derivation and simulation of a versatileelectrostatic trap for cold polar molecules

Shengqiang Li(李胜强)   

  1. School of New Energy and Electronic Engineering, Yancheng Teachers University, Yancheng 224002, China
  • Received:2016-04-23 Revised:2016-06-26 Online:2016-11-05 Published:2016-11-05
  • Contact: Shengqiang Li E-mail:lishengqiang2007@126.com
  • Supported by:
    Project supported by the National Nature Science Foundation of China (Grant No. 11504318).

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摘要： We propose a versatile electrostatic trap scheme using several charged spherical electrodes and a bias electric field. We first give the two-ball scheme and derive the analytical solution of the electric field. In order to make a comparison, we also give the numerical solution calculated by the finite element software (Ansoft Maxwell). Considering the loading of cold polar molecules into the trap, we give the three-ball scheme. We first give the analytical and numerical solutions of the distribution of the electric field. Then we simulate the dynamic process of the loading and trapping cold molecules using the classical Monte Carlo method. We analyze the influence of the velocity of the incident molecular beam and the loading time on the loading efficiency. After that, we give the temperature of the trapped cold molecules. Our study shows that the loading efficiency can reach 82%, and the corresponding temperature of the trapped molecules is about 24.6 mK. At last, we show that the single well divides into two ones by increasing the bias electric field or decreasing the voltages applied to the spherical electrodes.

关键词: cold polar molecules, electrostatic trapping, Monte Carlo simulation

Abstract: We propose a versatile electrostatic trap scheme using several charged spherical electrodes and a bias electric field. We first give the two-ball scheme and derive the analytical solution of the electric field. In order to make a comparison, we also give the numerical solution calculated by the finite element software (Ansoft Maxwell). Considering the loading of cold polar molecules into the trap, we give the three-ball scheme. We first give the analytical and numerical solutions of the distribution of the electric field. Then we simulate the dynamic process of the loading and trapping cold molecules using the classical Monte Carlo method. We analyze the influence of the velocity of the incident molecular beam and the loading time on the loading efficiency. After that, we give the temperature of the trapped cold molecules. Our study shows that the loading efficiency can reach 82%, and the corresponding temperature of the trapped molecules is about 24.6 mK. At last, we show that the single well divides into two ones by increasing the bias electric field or decreasing the voltages applied to the spherical electrodes.

Key words: cold polar molecules, electrostatic trapping, Monte Carlo simulation

中图分类号:  (Trapping of molecules)

  • 37.10.Pq
37.10.Mn (Slowing and cooling of molecules) 37.10.Vz (Mechanical effects of light on atoms, molecules, and ions) 37.20.+j (Atomic and molecular beam sources and techniques)