Ultrafast Relativistic Electron Nanoprobes

Ji, F.; Durham, D. B.; Minor, A. M.; Musumeci, P.; Navarro, J. G.; Filippetto, D.

doi:10.1038/s42005-019-0154-4

Title: Ultrafast Relativistic Electron Nanoprobes

Journal Article · Tue May 21 00:00:00 EDT 2019 · Communications Physics

DOI:https://doi.org/10.1038/s42005-019-0154-4· OSTI ID:1619747

Ji, F.;

;

; Musumeci, P.; Navarro, J. G.;

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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1619747

Alternate ID(s):: OSTI ID: 1510770

Journal Information:: Communications Physics, Journal Name: Communications Physics Vol. 2 Journal Issue: 1; ISSN 2399-3650

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United Kingdom

Language:: English

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Cited by: 16 works

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