AN ELECTROSTATIC LENS FOR ZERO-DEGREE ELECTRON-SPECTROSCOPY

Authors
VIKOR L SARKADI L TOKESI K VARGA D PENENT F PALINKAS J
Citation
L. Vikor et al., AN ELECTROSTATIC LENS FOR ZERO-DEGREE ELECTRON-SPECTROSCOPY, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 114(1-2), 1996, pp. 164-171
Citations number
16
Categorie Soggetti
Physics, Nuclear","Nuclear Sciences & Tecnology","Instument & Instrumentation
Journal title
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms → ACNP
ISSN journal
0168583X
Volume
114
Issue
1-2
Year of publication
1996
Pages
164 - 171
Database
ISI
SICI code
0168-583X(1996)114:1-2<164:AELFZE>2.0.ZU;2-8
Abstract
A multi-element electrostatic lens was constructed to improve the ener gy analysis of electrons ejected at zero degree in ion-atom collisions . The lens, coupled to a cylindrical mirror analyser, considerably ext ends the energy range of the analyser to lower energies by acceleratio n of the electrons, and improves its angular resolution by angular mag nification. The distribution of the potential in the lens was determin ed using series expansion, starting from a given function of potential at the lens axis. The electron-optical properties of the lens were ob tained from ray tracing, The power of the lens is demonstrated taking the spectrum of electrons emitted from He- on Ar collisions at 112 keV impact energy, in which the auto-ionization peaks originating from th e (1s2p2p') P-4(e) shape resonance of He- are completely resolved.