中国物理B ›› 2017, Vol. 26 ›› Issue (10): 106104-106104.doi: 10.1088/1674-1056/26/10/106104

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Simulations of guiding of low-energy ions through a single nanocapillary in insulating materials

Shi-Dong Liu(刘世东), Yong-Tao Zhao(赵永涛), Yu-Yu Wang(王瑜玉)   

  1. 1. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;
    2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. School of Science, Xi'an Jiaotong University, Xi'an 710049, China
  • 收稿日期:2017-05-04 修回日期:2017-06-30 出版日期:2017-10-05 发布日期:2017-10-05
  • 通讯作者: Yong-Tao Zhao, Yu-Yu Wang E-mail:zhaoyongtao@xjtu.edu.cn;wangyuyu@impcas.ac.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11275238, 11205225, and 11375034).

Simulations of guiding of low-energy ions through a single nanocapillary in insulating materials

Shi-Dong Liu(刘世东)1,2, Yong-Tao Zhao(赵永涛)2,3, Yu-Yu Wang(王瑜玉)2   

  1. 1. Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, College of Physics and Engineering, Qufu Normal University, Qufu 273165, China;
    2. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. School of Science, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2017-05-04 Revised:2017-06-30 Online:2017-10-05 Published:2017-10-05
  • Contact: Yong-Tao Zhao, Yu-Yu Wang E-mail:zhaoyongtao@xjtu.edu.cn;wangyuyu@impcas.ac.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11275238, 11205225, and 11375034).

摘要:

Simulations of guiding of low-energy ions through a single nanocapillary in insulating polymers are reported. The nanocapillary has a diameter of 100 nm and a length of 10 μm. Different from previous work, in our simulations a hyperbolic function is used to describe the decay of the charges deposited on the capillary surface. The present simulations reproduce the self-organized charge-up process occurring in the capillary. It is shown that lower-energy ions undergo more oscillations to get guiding equilibrium than those of higher-energy ions, resulting in a longer charging time, which is in good agreement with previous experimental results. Moreover, the experimentally observed mass independence of ion guiding is proved in our simulations. In particular, it is found that the maximum of the repulsive field within the capillary is independent of the ion energy as well as the tilt angle. To counterbalance the increasing of the transversal energy caused by increasing the tilt angle or incident energy, the effective length of the repulsive field is expanded in a self-organizing manner.

关键词: ion transmission, capillary guiding, nanocapillary

Abstract:

Simulations of guiding of low-energy ions through a single nanocapillary in insulating polymers are reported. The nanocapillary has a diameter of 100 nm and a length of 10 μm. Different from previous work, in our simulations a hyperbolic function is used to describe the decay of the charges deposited on the capillary surface. The present simulations reproduce the self-organized charge-up process occurring in the capillary. It is shown that lower-energy ions undergo more oscillations to get guiding equilibrium than those of higher-energy ions, resulting in a longer charging time, which is in good agreement with previous experimental results. Moreover, the experimentally observed mass independence of ion guiding is proved in our simulations. In particular, it is found that the maximum of the repulsive field within the capillary is independent of the ion energy as well as the tilt angle. To counterbalance the increasing of the transversal energy caused by increasing the tilt angle or incident energy, the effective length of the repulsive field is expanded in a self-organizing manner.

Key words: ion transmission, capillary guiding, nanocapillary

中图分类号:  (Channeling phenomena (blocking, energy loss, etc.) ?)

  • 61.85.+p
34.50.Fa (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization)) 72.20.-i (Conductivity phenomena in semiconductors and insulators)