Voltage optimization of a 4-element injection lens on a hemispherical spectrograph with virtual entry aperture


Martinez G., Fernandez-Martin M., Sise O., Madesis I., Dimitriou A., Laoutaris A., ...More

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, vol.369, pp.92-94, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 369
  • Publication Date: 2016
  • Doi Number: 10.1016/j.nimb.2015.10.009
  • Title of Journal : NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
  • Page Numbers: pp.92-94

Abstract

We present simulation results for a biased paracentric hemispherical deflector analyzer equipped with a 4-element input lens and a position sensitive detector used in our zero-degree Auger projectile spectroscopy apparatus. Calculations of electron trajectories traversing the lens and analyzer fields were performed and cross checked using both boundary-element and finite-difference methods. The two middle lens electrode voltages were varied as free parameters, while various criteria were used to select their optimal values in an effort to obtain improved energy resolution. (C) 2015 Elsevier B.V. All rights reserved.