A photoionized pulsed low-energy ion beam source for quantum state-to-state crossed ion-molecule scattering

Guodong Zhang; Lichang Guan; Min Cheng; Hong Gao

doi:10.1063/5.0071842

A photoionized pulsed low-energy ion beam source for quantum state-to-state crossed ion-molecule scattering

Rev Sci Instrum. 2021 Nov 1;92(11):113302. doi: 10.1063/5.0071842.

Authors

Guodong Zhang¹, Lichang Guan¹, Min Cheng¹, Hong Gao¹

Affiliation

¹ Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

PMID: 34852539
DOI: 10.1063/5.0071842

Abstract

Here, we report the design and test of a pulsed low-energy ion beam source for crossed ion-molecule scattering studies. The ions are produced by laser photoionization based methods and thus can be prepared in well-defined quantum states. By using the combination of a double Einzel lenses setup and a specially designed shielding tube, a well spatially confined ion bunch with tunable kinetic energies in the range of 1.0-5.0 eV and typical spreads of ∼150 meV (full width at half maximum) can be formed in the center of a velocity-map imaging (VMI) stack. By combining it with a recently constructed three-dimensional VMI system, the present apparatus is readily available for quantum state-to-state crossed ion-molecule scattering studies.