title: Doppler-free/Doppler-sliced ion imaging.
abstract: We demonstrate a hybrid Doppler-free/Doppler-sliced ion imaging approach that is well-suited for detection of H or D atoms. The method relies on 2 + 1 resonant ionization with identical, nearly counterpropagating beams that are coplanar but directed at a small angle relative to the detector face. This results in Doppler selection of the velocity component along the time of flight axis but Doppler-free detection in the plane perpendicular to this axis. The results show high signal level and excellent slicing ( approximately 5%), yielding velocity resolution completely determined by cation recoil in the ionization step.
authors.affiliation: Department of Chemistry, Wayne State University, Detroit, MI 48202, USA.
authors.forename: Cunshun
authors.initials: C
authors.lastname: Huang
authors.forename: Sridhar A
authors.initials: SA
authors.lastname: Lahankar
authors.forename: Myung
authors.initials: M
authors.lastname: Hwa Kim
authors.forename: Bailin
authors.initials: B
authors.lastname: Zhang
authors.forename: Arthur G
authors.initials: AG
authors.lastname: Suits
mesh_terms: D004301:Doppler Effect; D006859:Hydrogen / Q000032:analysis*; D007089:Image Enhancement / Q000379:methods*; D007477:Ions; D007834:Lasers; D011673:Pulsatile Flow / Q000502:physiology*; D011839:Radiation, Ionizing
chemical_list: D007477:Ions; D006859:Hydrogen