skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Study of In-Trap Ion Clouds by Ion Trajectory Simulations

Abstract

Gaussian distribution has been utilized to describe the global number density distribution of ion cloud in the Paul trap, which is known as the thermal equilibrium theory and widely used in theoretical modeling of ion clouds in the ion traps. Using ion trajectory simulations, however, the ion clouds can now also be treated as a dynamic ion flow field and the location-dependent features could now be characterized. This study was carried out to better understand the in-trap ion cloud properties, such as the local particle velocity and temperature. The local ion number densities were found to be heterogeneously distributed in terms of mean and distribution width; the velocity and temperature of the ion flow varied with pressure depending on the flow type of the neutral molecules; and the “quasi-static” equilibrium status can only be achieved after a certain number of collisions, for which the time period is pressure-dependent. This work provides new insights of the ion clouds that are globally stable but subjected to local rf heating and collisional cooling. .

Authors:
; ;  [1];  [2];  [1];  [3];  [1]
  1. State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument (China)
  2. Purdue University, Weldon School of Biomedical Engineering (United States)
  3. Wuhan University, Department of Physics (China)
Publication Date:
OSTI Identifier:
22776783
Resource Type:
Journal Article
Journal Name:
Journal of the American Society for Mass Spectrometry
Additional Journal Information:
Journal Volume: 29; Journal Issue: 2; Conference: 32. Asilomar conference on novel instrumentation in MS and ion mobility, Pacific Grove, CA (United States), 14-18 Oct 2016; Other Information: Copyright (c) 2018 American Society for Mass Spectrometry; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-0305
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; DISTRIBUTION; GAUSS FUNCTION; IONS; MOLECULES; PRESSURE DEPENDENCE; SIMULATION; THERMAL EQUILIBRIUM; TRAPS

Citation Formats

Zhou, Xiaoyu, Liu, Xinwei, Cao, Wenbo, Wang, Xiao, Li, Ming, Qiao, Haoxue, and Ouyang, Zheng. Study of In-Trap Ion Clouds by Ion Trajectory Simulations. United States: N. p., 2018. Web. doi:10.1007/S13361-017-1814-9.
Zhou, Xiaoyu, Liu, Xinwei, Cao, Wenbo, Wang, Xiao, Li, Ming, Qiao, Haoxue, & Ouyang, Zheng. Study of In-Trap Ion Clouds by Ion Trajectory Simulations. United States. doi:10.1007/S13361-017-1814-9.
Zhou, Xiaoyu, Liu, Xinwei, Cao, Wenbo, Wang, Xiao, Li, Ming, Qiao, Haoxue, and Ouyang, Zheng. Thu . "Study of In-Trap Ion Clouds by Ion Trajectory Simulations". United States. doi:10.1007/S13361-017-1814-9.
@article{osti_22776783,
title = {Study of In-Trap Ion Clouds by Ion Trajectory Simulations},
author = {Zhou, Xiaoyu and Liu, Xinwei and Cao, Wenbo and Wang, Xiao and Li, Ming and Qiao, Haoxue and Ouyang, Zheng},
abstractNote = {Gaussian distribution has been utilized to describe the global number density distribution of ion cloud in the Paul trap, which is known as the thermal equilibrium theory and widely used in theoretical modeling of ion clouds in the ion traps. Using ion trajectory simulations, however, the ion clouds can now also be treated as a dynamic ion flow field and the location-dependent features could now be characterized. This study was carried out to better understand the in-trap ion cloud properties, such as the local particle velocity and temperature. The local ion number densities were found to be heterogeneously distributed in terms of mean and distribution width; the velocity and temperature of the ion flow varied with pressure depending on the flow type of the neutral molecules; and the “quasi-static” equilibrium status can only be achieved after a certain number of collisions, for which the time period is pressure-dependent. This work provides new insights of the ion clouds that are globally stable but subjected to local rf heating and collisional cooling. .},
doi = {10.1007/S13361-017-1814-9},
journal = {Journal of the American Society for Mass Spectrometry},
issn = {1044-0305},
number = 2,
volume = 29,
place = {United States},
year = {2018},
month = {2}
}