Estimate of control voltage tolerances for a photo-electron analyzer of toroidal design

Azimonte, C.; Castro, Alonso; Tadich, Anton; Riley, J.D.; Leckey, Robert

doi:10.1590/s0103-97332003000400031

Cited by 2 publications

(1 citation statement)

References 3 publications

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“…12,13,[34][35][36][37][38] The imaging aberrations resulting from projecting particles, focusing at a conical surface, onto a planar detector are nevertheless still present. However, as the imaging aberration is now independent of the azimuthal angle , collection over an angular range ⌬ of up to 360°c an be achieved with uniform angular resolution.…”

Section: Focusing In the Axial Planesmentioning

confidence: 99%

Invited Article: An improved double-toroidal spectrometer for gas phase (e,2e) studies

Lower

Panajotović

Bellm

et al. 2007

Review of Scientific Instruments

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A new spectrometer is described for measuring the momentum distributions of scattered electrons arising from electron-atom and electron-molecule ionization experiments. It incorporates and builds on elements from a number of previous designs, namely, a source of polarized electrons and two high-efficiency electrostatic electron energy analyzers. The analyzers each comprise a seven-element retarding-electrostatic lens system, four toroidal-sector electrodes, and a fast position-and-time-sensitive two-dimensional delay-line detector. Results are presented for the electron-impact-induced ionization of helium and the elastic scattering of electrons from argon and helium which demonstrate that high levels of momentum resolution and data-collection efficiency are achieved. Problematic aspects regarding variations in collection efficiency over the accepted momentum phase space are addressed and a methodology for their correction presented. Principles behind the present design and previous designs for electrostatic analyzers based around electrodes of toroidal-sector geometry are discussed and a framework is provided for optimizing future devices.

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