Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.nima.2010.12.009
Title: Improvement of a second-order focusing toroidal spectrometer by use of a pre-collimating lens
Authors: Hoang, H.Q. 
Khursheed, A. 
Keywords: Electron energy spectrometer
Scanning electron microscopy
Toroidal spectrometer
Issue Date: 21-Jul-2011
Source: Hoang, H.Q., Khursheed, A. (2011-07-21). Improvement of a second-order focusing toroidal spectrometer by use of a pre-collimating lens. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 645 (1) : 245-247. ScholarBank@NUS Repository. https://doi.org/10.1016/j.nima.2010.12.009
Abstract: This paper presents a method for improving the performance of a second-order focusing toroidal spectrometer using a pre-collimating lens. Simulation results predict that the degree to which the energy resolution can be improved depends on the relative size of the lens. For a pre-collimating lens having a radius 180 times smaller than the spectrometer radius, the relative energy resolution is predicted to improve by an order of magnitude. The simulated relative energy resolution of the spectrometer with such a pre-collimating lens is 0.021% for an entrance aperture angular spread of ±6°, and 0.088% for an entrance angular spread of ±10°. © 2010 Elsevier B.V. Allrights reserved.
Source Title: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
URI: http://scholarbank.nus.edu.sg/handle/10635/70561
ISSN: 01689002
DOI: 10.1016/j.nima.2010.12.009
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