Title :

Event-based hyperspectral EELS: towards nanosecond temporal resolution

Author(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]

Journal title :

Ultramicroscopy

Abbreviated title :

Ultramicroscopy

Volume number :

239

Pages :

113539

Publisher :

Elsevier BV

Publication date :

2022-09

ISSN :

0304-3991

HAL domain(s) :

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

English abstract : [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 ...
Show more >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.Show less >

Language :

Anglais

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRAE
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Matériaux Terrestres et Planétaires

Submission date :

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