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Complete 3D photoelectron momentum vector reconstruction from time-position charged particle imaging

DOITrouver le DOI : https://doi.org/10.1088/1361-6455/ada652
AuteurRechercher : 1, 2; Rechercher : 1, 2Identifiant ORCID : https://orcid.org/0009-0005-8704-5088; Rechercher : 1, 2Identifiant ORCID : https://orcid.org/0009-0000-7262-6393; Rechercher : 2Identifiant ORCID : https://orcid.org/0009-0000-1323-7291; Rechercher : 2; Rechercher : 3; Rechercher : 4Identifiant ORCID : https://orcid.org/0000-0002-4975-4888; Rechercher : 1, 2, 5Identifiant ORCID : https://orcid.org/0000-0002-8447-3678
Affiliation
  1. Université d'Ottawa
  2. Conseil national de recherches Canada. Quantique et nanotechnologies
  3. Helmholtz-Zentrum Berlin für Materialien und Energie
  4. University of Mary Washington
  5. University of Ottawa-NRC Joint Centre for Extreme Photonics
Bailleur de fondsRechercher : Canada Foundation for Innovation; Rechercher : Canada Research Chairs; Rechercher : National Research Council Canada; Rechercher : Natural Sciences and Engineering Research Council of Canada; Rechercher : NRC-uOttawa Joint Centre for Extreme Photonics
FormatTexte, Article
Sujetvelocity map imaging; photoelectron spectroscopy; photoelectron angular distribution; nitric oxide; 3D charged particle imaging; momentum vector reconstruction
Résumé
Many charged particle imaging techniques exist which directly measure, at a detector, the transverse position (x, y) and time-of-flight (t) of individual events in order to obtain a full set of 3D coordinates. Where curved velocity-mapping electric field lines are implemented, as in the case of 3D Velocity Map Imaging (3D VMI) and certain COLTRIMS (Cold Target Recoil Ion Momentum Spectroscopy) instruments, the general transformation of (x, y, t)-data into initial 3D recoil momentum vectors (px , py , pz ) is challenging and has not yet been fully addressed. Here we present a detailed and general method for this transformation, illustrated using our 3D VMI spectrometer and the well-known narrow-band photoionization of nitric oxide, for which we demonstrate quantitative agreement with reported values. We additionally show how to measure and correct (i) small errors in the laser polarization axis alignment at the interaction region of a 3D charged particle imaging spectrometer, and (ii) the spatial variation of gain on a microchannel plate (MCP) detector. Improvements to and characterization of our 3D VMI spectrometer yield an electron time-of-flight resolution of 72 ps across the full 40 mm MCP, in combination with pixel-level spatial resolution.
Date de publication
Maison d’éditionIOP Publishing
Déclaration de droit d’auteur
  • © 2025 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.
Dans
  • Journal of Physics B: Atomic, Molecular and Optical Physics 58, nº 3, 035101 (24 janvier 2025) : 1–15.
Langueanglais
Publications évaluées par des pairsOui
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Identificateur de l’enregistrement7f6a8243-50f7-4cf2-94f0-806a2a7364a5
Enregistrement créé2026-01-23
Enregistrement modifié2026-02-25

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