Titre :

Event-based hyperspectral EELS: towards nanosecond temporal resolution

Auteur(s) :

Auad, Yves [Auteur]
Laboratoire de Physique des Solides [LPS]
Walls, Michael [Auteur]
Laboratoire de Physique des Solides [LPS]
Blazit, Jean-Denis [Auteur]
Laboratoire de Physique des Solides [LPS]
Stéphan, Odile [Auteur]
Laboratoire de Physique des Solides [LPS]
Tizei, Luiz H.G. [Auteur]
Laboratoire de Physique des Solides [LPS]
Kociak, Mathieu [Auteur]
Laboratoire de Physique des Solides [LPS]
de la Peña, Francisco [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Tencé, Marcel [Auteur]
Laboratoire de Physique des Solides [LPS]

Titre de la revue :

Ultramicroscopy

Nom court de la revue :

Ultramicroscopy

Numéro :

239

Pagination :

113539

Éditeur :

Elsevier BV

Date de publication :

2022-09

ISSN :

0304-3991

Discipline(s) HAL :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]
Physique [physics]/Physique [physics]/Géophysique [physics.geo-ph]
Physique [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Astrophysique [astro-ph]
Planète et Univers [physics]/Sciences de la Terre

Résumé en anglais : [en]

The acquisition of a hyperspectral image is nowadays a standard technique used in the scanning transmission electron microscope. It relates the spatial position of the electron probe to the spectral data associated with ...
Lire la suite >The acquisition of a hyperspectral image is nowadays a standard technique used in the scanning transmission electron microscope. It relates the spatial position of the electron probe to the spectral data associated with it. In the case of electron energy loss spectroscopy (EELS), frame-based hyperspectral acquisition is much slower than the achievable rastering time of the scan unit (SU), which sometimes leads to undesirable effects in the sample, such as electron irradiation damage, that goes unperceived during frame acquisition. In this work, we have developed an event-based hyperspectral EELS by using a Timepix3 application-specific integrated circuit detector with two supplementary time-to-digital (TDC) lines embedded. In such a system, electron events are characterized by their positional and temporal coordinates, but TDC events only by temporal ones. By sending reference signals from the SU to the TDC line, it is possible to reconstruct the entire spectral image with SU-limited scanning pixel dwell time and thus acquire, with no additional cost, a hyperspectral image at the same rate as that of a single channel detector, such as annular dark-field. To exemplify the possibilities behind event-based hyperspectral EELS, we have studied the decomposition of calcite (CaCO) into calcium oxide (CaO) and carbon dioxide (CO) under the electron beam irradiation.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Matériaux Terrestres et Planétaires

Date de dépôt :

2024-02-01T09:34:00Z
2024-02-02T08:44:02Z