Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/56088
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Type: | Journal article |
Title: | Invited article: An improved double-toroidal spectrometer for gas phase (e,2e) studies |
Author: | Lower, J. Panajotovic, R. Bellm, S. Weigold, E. |
Citation: | Review of Scientific Instruments, 2007; 78(11):111301-1-111301-20 |
Publisher: | Amer Inst Physics |
Issue Date: | 2007 |
ISSN: | 0034-6748 1089-7623 |
Statement of Responsibility: | J. Lower, R. Panajotović, S. Bellm, and E. Weigold |
Abstract: | <jats:p>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.</jats:p> |
Rights: | © 2007 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. |
DOI: | 10.1063/1.2813014 |
Published version: | http://dx.doi.org/10.1063/1.2813014 |
Appears in Collections: | Aurora harvest 5 Physics publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_56088.pdf | Published version | 1.08 MB | Adobe PDF | View/Open |
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