A mini-photofragment translational spectrometer with ion velocity map imaging using low voltage acceleration

doi:10.1063/1.5006982

CORC > 化学研究所 > 中国科学院化学研究所

	A mini-photofragment translational spectrometer with ion velocity map imaging using low voltage acceleration
	Qi, Wenke 1,2; Jiang, Pan 1,2; Lin, Dan 1,2; Chi, Xiaoping 1,2; Cheng, Min 1; Du, Yikui 1; Zhu, Qihe 1
刊名	REVIEW OF SCIENTIFIC INSTRUMENTS
	2018
卷号	89 期号:1
ISSN号	0034-6748
DOI	10.1063/1.5006982
英文摘要	A mini time-sliced ion velocity map imaging photofragment translational spectrometer using low voltage acceleration has been constructed. The innovation of this apparatus adopts a relative low voltage (30-150 V) to substitute the traditional high voltage (650-4000 V) to accelerate and focus the fragment ions. The overall length of the flight path is merely 12 cm. There are many advantages for this instrument, such as compact structure, less interference, and easy to operate and control. Low voltage acceleration gives a longer turn-around time to the photofragment ions forming a thicker Newton sphere, which provides sufficient time for slicing. Ion trajectory simulation has been performed for determining the structure dimensions and the operating voltages. The photodissociation and multiphoton ionization of O-2 at 224.999 nm is used to calibrate the ion images and examine the overall performance of the new spectrometer. The velocity resolution (Delta v/v) of this spectrometer from O-2 photodissociation is about 0.8%, which is better than most previous results using high acceleration voltage. For the case of CF3I dissociation at 277.38 nm, many CF3 vibrational states have been resolved, and the anisotropy parameter has been measured. The application of low voltage acceleration has shown its advantages on the ion velocity map imaging (VMI) apparatus. The miniaturization of the VMI instruments can be realized on the premise of high resolution. Published by AIP Publishing.
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000424022400001
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/45619]
专题	中国科学院化学研究所
通讯作者	Cheng, Min
作者单位	1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Qi, Wenke,Jiang, Pan,Lin, Dan,et al. A mini-photofragment translational spectrometer with ion velocity map imaging using low voltage acceleration[J]. REVIEW OF SCIENTIFIC INSTRUMENTS,2018,89(1).
APA	Qi, Wenke.,Jiang, Pan.,Lin, Dan.,Chi, Xiaoping.,Cheng, Min.,...&Zhu, Qihe.(2018).A mini-photofragment translational spectrometer with ion velocity map imaging using low voltage acceleration.REVIEW OF SCIENTIFIC INSTRUMENTS,89(1).
MLA	Qi, Wenke,et al."A mini-photofragment translational spectrometer with ion velocity map imaging using low voltage acceleration".REVIEW OF SCIENTIFIC INSTRUMENTS 89.1(2018).