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Performance of thin foil scintillating screen for transmission electron microscopy
G Y Fan1, D G Dunkelberger, M H Ellisman
1Department of Neurosciences, University of California at San Diego, La Jolla 92093-0608.
Ultramicroscopy
|July 1, 1994
Summary
Metal foil-based phosphor screens offer superior brightness and resolution for transmission electron microscopy. Their performance improves with higher voltages, making them ideal for high-voltage applications.
Area of Science:
- Materials Science
- Electron Microscopy
Background:
- Scintillating screens are crucial for transmission electron microscopy (TEM).
- Traditional screens use phosphor coatings on glass plates.
- Metal foil-backed screens offer potential advantages.
Purpose of the Study:
- To evaluate the performance of a phosphor-coated metal foil screen for TEM.
- To compare its brightness and resolution against glass-based screens.
- To assess its suitability for high-voltage TEM applications.
Main Methods:
- A 10-micron P20 phosphor layer was coated onto a 2-micron aluminum foil.
- Brightness and resolution were measured in the 100-400 kV voltage range.
- Performance was compared to a similar phosphor layer on a glass plate.
Main Results:
- The metal foil screen demonstrated superior brightness and resolution compared to the glass plate screen.
- Resolution showed a slight improvement at higher operating voltages (100-400 kV).
- The screen exhibited excellent radiation damage resistivity and electron beam stability.
Conclusions:
- Phosphor-coated metal foil screens are a promising alternative for TEM applications.
- Their enhanced performance and stability make them suitable for high-voltage electron microscopy.
- The voltage-dependent resolution improvement is a unique advantage for advanced imaging.