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Title: New developments for an electron impact (e,2e)/(e,3e) spectrometer with multiangle collection and multicoincidence detection

Abstract

We describe new developments aimed to extend the capabilities and the sensitivity of the (e,2e)/(e,3e) multicoincidence spectrometer at Orsay University [Duguet et al., Rev. Sci. Instrum. 69, 3524 (1998)]. The spectrometer has been improved by the addition of a third multiangle detection channel for the fast ''scattered'' electron. The present system is unique in that it is the only system which combines three toroidal analyzers all equipped with position sensitive detectors, thus allowing the triple coincidence detection of the three electrons present in the final state of an electron impact double ionization process. The setup allows measurement of the angular and energy distributions of the ejected electrons over almost the totality of the collision plane as well as that of the scattered electron over a large range of scattering angles in the forward direction. The resulting gain in sensitivity ({approx}25) has rendered feasible a whole class of experiments which could not be otherwise envisaged. The setup is described with a special emphasis on the new toroidal analyzer, data acquisition hardware, and data analysis procedures. The performances are illustrated by selected results of (e,2e) and (e,3e) experiments on the rare gases.

Authors:
; ; ; ; ; ; ;  [1];  [2];  [3]
  1. Laboratoire des Collisions Atomiques et Moleculaires (UMR 8625) and Federation Lumiere Matiere (FR 2764), Batiment 351, Universite de Paris-Sud XI, 91405 Orsay Cedex (France)
  2. (Australia)
  3. (Italy)
Publication Date:
OSTI Identifier:
20953229
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 78; Journal Issue: 1; Other Information: DOI: 10.1063/1.2428275; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; DATA ACQUISITION; DATA ANALYSIS; DETECTION; ELECTRON SPECTROMETERS; ELECTRONS; ENERGY SPECTRA; GAIN; IONIZATION; PERFORMANCE; POSITION SENSITIVE DETECTORS; RARE GASES; SCATTERING; SENSITIVITY

Citation Formats

Catoire, F., Staicu-Casagrande, E. M., Lahmam-Bennani, A., Duguet, A., Naja, A., Ren, X. G., Lohmann, B., Avaldi, L., Centre for Quantum Dynamics, Griffith University, Nathan Qld 4111, and CNR-Istituto di Metodologie Inorganiche e dei Plasmi, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo. New developments for an electron impact (e,2e)/(e,3e) spectrometer with multiangle collection and multicoincidence detection. United States: N. p., 2007. Web. doi:10.1063/1.2428275.
Catoire, F., Staicu-Casagrande, E. M., Lahmam-Bennani, A., Duguet, A., Naja, A., Ren, X. G., Lohmann, B., Avaldi, L., Centre for Quantum Dynamics, Griffith University, Nathan Qld 4111, & CNR-Istituto di Metodologie Inorganiche e dei Plasmi, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo. New developments for an electron impact (e,2e)/(e,3e) spectrometer with multiangle collection and multicoincidence detection. United States. doi:10.1063/1.2428275.
Catoire, F., Staicu-Casagrande, E. M., Lahmam-Bennani, A., Duguet, A., Naja, A., Ren, X. G., Lohmann, B., Avaldi, L., Centre for Quantum Dynamics, Griffith University, Nathan Qld 4111, and CNR-Istituto di Metodologie Inorganiche e dei Plasmi, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo. Mon . "New developments for an electron impact (e,2e)/(e,3e) spectrometer with multiangle collection and multicoincidence detection". United States. doi:10.1063/1.2428275.
@article{osti_20953229,
title = {New developments for an electron impact (e,2e)/(e,3e) spectrometer with multiangle collection and multicoincidence detection},
author = {Catoire, F. and Staicu-Casagrande, E. M. and Lahmam-Bennani, A. and Duguet, A. and Naja, A. and Ren, X. G. and Lohmann, B. and Avaldi, L. and Centre for Quantum Dynamics, Griffith University, Nathan Qld 4111 and CNR-Istituto di Metodologie Inorganiche e dei Plasmi, Area della Ricerca di Roma 1, CP10, 00016 Monterotondo Scalo},
abstractNote = {We describe new developments aimed to extend the capabilities and the sensitivity of the (e,2e)/(e,3e) multicoincidence spectrometer at Orsay University [Duguet et al., Rev. Sci. Instrum. 69, 3524 (1998)]. The spectrometer has been improved by the addition of a third multiangle detection channel for the fast ''scattered'' electron. The present system is unique in that it is the only system which combines three toroidal analyzers all equipped with position sensitive detectors, thus allowing the triple coincidence detection of the three electrons present in the final state of an electron impact double ionization process. The setup allows measurement of the angular and energy distributions of the ejected electrons over almost the totality of the collision plane as well as that of the scattered electron over a large range of scattering angles in the forward direction. The resulting gain in sensitivity ({approx}25) has rendered feasible a whole class of experiments which could not be otherwise envisaged. The setup is described with a special emphasis on the new toroidal analyzer, data acquisition hardware, and data analysis procedures. The performances are illustrated by selected results of (e,2e) and (e,3e) experiments on the rare gases.},
doi = {10.1063/1.2428275},
journal = {Review of Scientific Instruments},
number = 1,
volume = 78,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2007},
month = {Mon Jan 15 00:00:00 EST 2007}
}