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VandenBussche and Flannigan_Beam Damage_Revised.pdf (3.48 MB)

Reducing Radiation Damage in Soft Matter with Femtosecond Timed Single-Electron Packets

preprint
revised on 18.07.2019, 21:50 and posted on 19.07.2019, 13:18 by Elisah VandenBussche, David Flannigan
We study the effects on radiation damage of using a femtosecond laser-driven, pulsed electron source in an otherwise conventional transmission electron microscope. We demonstrate precise control - at the single electron level - over the emission timing and the number of electrons emitted with each femtosecond laser pulse. We find that radiation damage is significantly reduced for such pulsed beams when compared to conventional ultralow-dose methods for the same dose rate and the same total dose. We also show that the degree of damage can be controlled by carefully varying the time between arrival of each electron at the specimen and by changing the number of electrons in each packet.

Funding

Imaging Nanoscale Energy Transport and Conversion with Ultrafast Electron Microscopy

Basic Energy Sciences

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Unraveling Charge/Orbital Ordering, Magnesium and Lattice Dynamics with Ultrafast Electron Microscopy

Arnold and Mabel Beckman Foundation

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History

Email Address of Submitting Author

flan0076@umn.edu

Institution

University of Minnesota

Country

United States of America

ORCID For Submitting Author

0000-0002-1829-1868

Declaration of Conflict of Interest

No conflict of interest

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