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Updated: Jan 3, 2026

Preparing a Celadonite Electron Source and Estimating Its Brightness

Preparing a Celadonite Electron Source and Estimating Its Brightness

Published on: November 5, 2019

Preparing a Celadonite Electron Source and Estimating Its Brightness.

Evelyne Salançon¹, Alain Degiovanni², Laurent Lapena²

¹CINaM-UMR7325, Aix-Marseille University, CNRS; salancon@cinam.univ-mrs.fr.

Journal of Visualized Experiments : Jove

|November 26, 2019

Summary

A novel electron celadonite source offers a robust, long-lasting alternative for low-energy electron microscopy. This durable source provides significant advantages over traditional metal tips for advanced imaging applications.

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Area of Science:

Materials Science
Electron Microscopy
Physics

Background:

Traditional electron sources often lack durability and stability.
Sharp metal tips present limitations in low-energy electron point-source projection microscopy.
There is a need for robust and reliable electron sources for advanced imaging.

Purpose of the Study:

To develop and characterize a novel electron source using celadonite crystals.
To evaluate the performance of the celadonite electron source in long-range imaging.
To compare the advantages of the celadonite source against conventional metal tips.

Main Methods:

Celadonite crystal deposition onto a carbon fiber apex using a micropipette.
Coaxial structure implementation for spherical beam shape and mechanical alignment.

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Preparing a Celadonite Electron Source and Estimating Its Brightness

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Field emission process initiation with a high voltage supply.

Performance evaluation in a low-energy electron point-source projection microscope.

Main Results:

The celadonite electron source demonstrates robust performance in long-range imaging.
The source exhibits a lifetime of months and tolerance to relatively high pressure.
Advantages over sharp metal tips include enhanced durability and operational stability.
Brightness measurements may be underestimated due to source size and cone angle estimations.

Conclusions:

The celadonite electron source is a promising, durable alternative for electron microscopy.
Its robustness and operational characteristics offer significant advantages for imaging applications.
Further characterization is needed to refine brightness measurements and optimize performance.