An angle‐resolved translational energy spectrometer for investigating low‐energy, highly charged ion–atom (molecule) collisions

• Published in: Review of scientific instruments 1993-11, Vol.64 (11), p.3139-3146
• Main Authors: Vancura, J., Perotti, J. J., Flidr, J., Kostroun, V. O.
• Format: Article
• Language: English
• Subjects: 664300 - Atomic & Molecular Physics- Collision Phenomena- (1992-); ATOM COLLISIONS; ATOMIC AND MOLECULAR PHYSICS; BEAM ANALYZERS; BEAM OPTICS; CHARGED PARTICLES; COLLISIONS; Electron, positron and ion microscopes, electron diffractometers and related techniques; ELECTROSTATIC ANALYZERS; Exact sciences and technology; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; ION COLLISIONS; ION SPECTROSCOPY; ION-ATOM COLLISIONS; ION-MOLECULE COLLISIONS; IONS; MOLECULE COLLISIONS; MULTICHARGED IONS; Physics; Scanning probe microscopes, components, and techniques; SPECTROSCOPY
• ISSN: 0034-6748; 1089-7623
• DOI: 10.1063/1.1144321

An experimental apparatus for investigating low‐collision energy gas‐phase reactions of highly charged ions with atoms and molecules by angle‐resolved translational energy spectroscopy is described. The basic function of the apparatus is to slow down highly charged ions extracted at 2–3 kV from the Cornell superconducting solenoid, cryogenic electron beam ion source (CEBIS) to energies below 100 qeV. The slowing down and monochromatization of the beam is done by an ion optical system that consists of two 180° hemispherical electrostatic analyzers with a tuneable deceleration lens located between them. The low‐energy beam available for experiments has an angular spread of 0.5° and an energy spread of 0.4 qeV. The ion optical system is mounted on a 508 mm by 576 mm electrically isolated platform inside a large vacuum chamber, and the modular nature of the apparatus allows for quick and easy rearrangement of the ion optical elements for different experiments. A brief overview of in‐plane scattering kinematics is given.