Investigation of ion enhanced guidance in a new
conical funnel drift tube

doi:10.3969/j.issn.1673-6141.2025.04.007

Journal of Atmospheric and Environmental Optics ›› 2025, Vol. 20 ›› Issue (4): 496-502.doi: 10.3969/j.issn.1673-6141.2025.04.007

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Investigation of ion enhanced guidance in a new conical funnel drift tube

CHEN Jiawei 1,2, ZHANG Qiangling 2*, MA Zhaoyun 2, ZOU Xue 2, HUANG Chaoqun 2,#br# BO Guangyu 3, SHEN Chengyin 2, CHU Yannan 2#br#

1 Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China; 2 Anhui Province Key Laboratory of Medical Physics and Technology, Institute of Health and Medical Technology, HFIPS, Chinese Academy of Sciences, Hefei 230031, China; 3 Center of Basic Science, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

Received:2022-02-24 Revised:2022-03-11 Online:2025-07-28 Published:2025-07-25
Contact: Qiang-Ling ZHANG E-mail:qlzhang@cmpt.ac.cn

Abstract

Abstract: A new drift tube structure for proton transfer reaction mass spectrometry, called conical funnel drift tube, is designed in this work, which is composed of 20 traditional ring electrodes and 5 new conical electrodes. Firstly, the ion focusing effect of the new drift tube is verified by ion trajectory simulation, and then further comparative experiments are conducted to validate the performance of the new drift tube. The results show that the new conical funnel drift tube has a softer ionization effect and higher sensitivity (4.0– 6.3 times) than the traditional drift tube. Moreover, different from the traditional RF focusing method, the new conical funnel drift tube can realize ion focusing only through DC electric field without the need of additional RF power supply, making it especially suitable for instruments requiring miniaturization and low power consumption to improve detection sensitivity.

Key words: conical funnel drift tube, direct current electric field, ion focusing, sensitivity

CLC Number:

TH843

CHEN Jiawei , ZHANG Qiangling , MA Zhaoyun , ZOU Xue , HUANG Chaoqun , BO Guangyu , SHEN Chengyin , CHU Yannan . Investigation of ion enhanced guidance in a new conical funnel drift tube[J]. Journal of Atmospheric and Environmental Optics, 2025, 20(4): 496-502.

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Investigation of ion enhanced guidance in a new conical funnel drift tube

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