DICP OpenIR
A mini-photofragment translational spectrometer with ion velocity map imaging using low voltage acceleration
Qi, Wenke1,2; Jiang, Pan1,2; Lin, Dan1,2; Chi, Xiaoping1,2; Cheng, Min1; Du, Yikui1; Zhu, Qihe1
Source PublicationREVIEW OF SCIENTIFIC INSTRUMENTS
2018
ISSN0034-6748
DOI10.1063/1.5006982
Volume89Issue:1
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Technology ; Physical Sciences
WOS SubjectInstruments & Instrumentation ; Physics, Applied
WOS Research AreaInstruments & Instrumentation ; Physics
WOS KeywordJET-COOLED ANILINE ; MOLECULAR-OXYGEN ; PHOTODISSOCIATION ; PHOTOELECTRON ; SPECTRA ; CF3I ; IONIZATION ; DYNAMICS
AbstractA 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.
Language英语
WOS IDWOS:000424022400001
PublisherAMER INST PHYSICS
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/168725
Collection中国科学院大连化学物理研究所
Corresponding AuthorCheng, Min
Affiliation1.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
Recommended Citation
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).
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