Ultrafast Relativistic Electron Nanoprobes
Abstract
One of the frontiers in electron scattering is to couple ultrafast temporal resolution with highly localized probes to investigate the role of microstructure on material properties. Here, taking advantage of the unprecedented average brightness of the APEX electron gun providing relativistic electron pulses at high repetition rates, we demonstrate for the first time the generation of ultrafast relativistic electron beams with picometer-scale emittance and their ability to probe nanoscale features on materials with complex microstructures. At the sample plane, the APEX beam is tightly focused by a custom in-vacuum lens system based on permanent magnet quadrupoles, and its evolution around the waist is tracked by a knife-edge technique, allowing accurate reconstruction of the beam shape and local density. We then use the focused beam to characterize a Ti-6 wt% Al polycrystalline sample by correlating the diffraction and imaging modality, showcasing the capability to locate grain boundaries and map adjacent crystallographic domains with sub-micron precision. This work provides a new paradigm for ultrafast electron instrumentation, demonstrating the ability to generate relativistic beams with ultra small transverse phase space volumes enabling novel characterization techniques such as relativistic ultrafast electron nano-diffraction and ultrafast scanning transmission electron microscopy.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
- OSTI Identifier:
- 1619747
- Alternate Identifier(s):
- OSTI ID: 1510770
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Published Article
- Journal Name:
- Communications Physics
- Additional Journal Information:
- Journal Name: Communications Physics Journal Volume: 2 Journal Issue: 1; Journal ID: ISSN 2399-3650
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY
Citation Formats
Ji, F., Durham, D. B., Minor, A. M., Musumeci, P., Navarro, J. G., and Filippetto, D. Ultrafast Relativistic Electron Nanoprobes. United Kingdom: N. p., 2019.
Web. doi:10.1038/s42005-019-0154-4.
Ji, F., Durham, D. B., Minor, A. M., Musumeci, P., Navarro, J. G., & Filippetto, D. Ultrafast Relativistic Electron Nanoprobes. United Kingdom. https://doi.org/10.1038/s42005-019-0154-4
Ji, F., Durham, D. B., Minor, A. M., Musumeci, P., Navarro, J. G., and Filippetto, D. Tue .
"Ultrafast Relativistic Electron Nanoprobes". United Kingdom. https://doi.org/10.1038/s42005-019-0154-4.
@article{osti_1619747,
title = {Ultrafast Relativistic Electron Nanoprobes},
author = {Ji, F. and Durham, D. B. and Minor, A. M. and Musumeci, P. and Navarro, J. G. and Filippetto, D.},
abstractNote = {One of the frontiers in electron scattering is to couple ultrafast temporal resolution with highly localized probes to investigate the role of microstructure on material properties. Here, taking advantage of the unprecedented average brightness of the APEX electron gun providing relativistic electron pulses at high repetition rates, we demonstrate for the first time the generation of ultrafast relativistic electron beams with picometer-scale emittance and their ability to probe nanoscale features on materials with complex microstructures. At the sample plane, the APEX beam is tightly focused by a custom in-vacuum lens system based on permanent magnet quadrupoles, and its evolution around the waist is tracked by a knife-edge technique, allowing accurate reconstruction of the beam shape and local density. We then use the focused beam to characterize a Ti-6 wt% Al polycrystalline sample by correlating the diffraction and imaging modality, showcasing the capability to locate grain boundaries and map adjacent crystallographic domains with sub-micron precision. This work provides a new paradigm for ultrafast electron instrumentation, demonstrating the ability to generate relativistic beams with ultra small transverse phase space volumes enabling novel characterization techniques such as relativistic ultrafast electron nano-diffraction and ultrafast scanning transmission electron microscopy.},
doi = {10.1038/s42005-019-0154-4},
journal = {Communications Physics},
number = 1,
volume = 2,
place = {United Kingdom},
year = {Tue May 21 00:00:00 EDT 2019},
month = {Tue May 21 00:00:00 EDT 2019}
}
https://doi.org/10.1038/s42005-019-0154-4
Web of Science
Figures / Tables:
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