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The operando hydrogen microscope is an original apparatus that has been developed to visualize the time-dependent permeation of hydrogen through a sample. This apparatus is developed based on an ultrahigh vacuum scanning electron microscope (UHV SEM). The system consists of a lens system to focus ions produced by electron-stimulated desorption (ESD), an ion detector optimized for ESD-signal detection, and a two-dimensional measurement program synchronized with the position information of the electron beam. The developed detectors and electrostatic lenses enable highly sensitive detection of the ions. In this paper, we show the details of the instrumentation of the operando hydrogen microscope. We have succeeded in recording hydrogen and deuterium flowing from the rear of metals to the surface as a series of time-lapse images, showing the time-dependent changes in the surface distribution of hydrogen and deuterium. Deuterium permeation through the metal sample was dynamically visualized at the surface by the two-dimensional mapping of the desorbed ions induced by scanning electron beam irradiation.

Rights:

• Creative Commons BY Attribution 4.0 International
  

Keyword: hydrogen microscope, ESD, hydrogen and deuterium

Date published: 2024-01-01

Publisher: American Vacuum Society

Journal:

• Journal of Vacuum Science & Technology A (ISSN: 07342101) vol. 42 issue. 1 013201

Funding:

• Japan Society for the Promotion of Science JP 22560709
• National Institute for Fusion Science NIFS15KEMF052
• National Institute for Fusion Science NIFS16KEMF052

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1116/6.0003153

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Updated at: 2024-12-05 16:30:39 +0900

Published on MDR: 2024-12-05 16:30:39 +0900