Open AccessExperimental energy resolution of a paracentric hemispherical deflector analyzer for different entry positions and bias simulated in SIMION
Author(s) -
G. G. Gennarakis,
T. J. M. Zouros
Publication year - 2019
Publication title -
hnps advances in nuclear physics
Language(s) - English
Resource type - Journals
eISSN - 2654-0088
pISSN - 2654-007X
DOI - 10.12681/hnps.2011
Subject(s) - spectrum analyzer , optics , resolution (logic) , monte carlo method , lens (geology) , energy (signal processing) , detector , kinetic energy , physics , computational physics , chemistry , computer science , classical mechanics , statistics , mathematics , quantum mechanics , artificial intelligence
Results from the simulation of a biased paracentric hemispherical deflector analyzer (HDA) with injection lens are presented. The finite differences electron optics software SIMION was used to perform Monte Carlo type trajectory simulations in an effort to investigate the focusing effects of the HDA entry and exit fringing fields which are used to improve energy resolution - a novel feature of this type of analyzer. Comparisons to recent experimental results are also presented. Biased paracentric HDAs represent a novel class of HDAs, which use the lensing action of the strong fringing fields at the HDA entry, to restore the first order focus characteristics of ideal HDAs in a controlled way. The improvement in energy resolution and transmission without the use of any additional fringing field correction electrodes is of particular interest to modern analyzers using position sensitive detectors.