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Characterization of a time-resolved electron microscope with a Schottky field emission gun.
- Source :
- Structural Dynamics; Sep2020, Vol. 7 Issue 5, p1-7, 7p
- Publication Year :
- 2020
-
Abstract
- The rapid growth of the field of time-resolved and ultrafast electron microscopy has been accompanied by the active development of new instrumentation. Recently, time-resolved microscopes equipped with a field emission gun have been introduced, demonstrating great potential for experiments that benefit from the high brightness and coherence of the electron source. Here, we describe a straightforward design of a time-resolved transmission electron microscope with a Schottky field emission gun and characterize its performance. At the same time, our design gives us the flexibility to alternatively operate the instrument as if it was equipped with a flat metal photocathode. We can, thus, effectively choose to sacrifice brightness in order to obtain pulses with vastly larger numbers of electrons than from the emitter if for a given application the number of electrons is a crucial figure of merit. We believe that our straightforward and flexible design will be of great practical relevance to researchers wishing to enter the field. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 23297778
- Volume :
- 7
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- Structural Dynamics
- Publication Type :
- Academic Journal
- Accession number :
- 146790773
- Full Text :
- https://doi.org/10.1063/4.0000034