title: Wide-mass-range axialization for high-resolution Fourier-transform ion cyclotron resonance mass spectrometry of externally generated ions.
abstract: Ions generated in both continuous and pulsed-mode external ion sources are injected into an open-ended cylindrical Fourier-transform ion cyclotron resonance ion trap by means of an electrostatic ion guide consisting of concentric cylinder and wire electrodes to which a potential difference is applied. Broadband axialization during ion injection improves ion trapping efficiency by reducing the ion off-axis displacement. Significant improvements in both signal-to-noise ratio and mass resolving power, along with high mass selectivity are demonstrated for ions generated by external Cs+ secondary ion mass spectrometry or by matrix-assisted laser desorption/ionization.
authors.affiliation: Department of Chemistry, Ohio State University, Columbus.
authors.forename: J A
authors.initials: JA
authors.lastname: Marto
authors.forename: S
authors.initials: S
authors.lastname: Guan
authors.forename: A G
authors.initials: AG
authors.lastname: Marshall
mesh_terms: D002586:Cesium / Q000737:chemistry; D017357:Cyclotrons; D004566:Electrodes; D007834:Lasers; D013058:Mass Spectrometry / Q000295:instrumentation*; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002586:Cesium