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  Optical fiber-driven low energy electron gun for ultrafast streak diffraction

Lee, C., Kassier, G., & Miller, R. J. D. (2018). Optical fiber-driven low energy electron gun for ultrafast streak diffraction. Applied Physics Letters, 113(13): 133502. doi:10.1063/1.5039737.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-4557-F Version Permalink: http://hdl.handle.net/21.11116/0000-0004-93BE-0
Genre: Journal Article

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https://dx.doi.org/10.1063/1.5039737 (Publisher version)
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 Creators:
Lee, C.1, Author              
Kassier, G.1, Author              
Miller, R. J. D.1, 2, Author              
Affiliations:
1Miller Group, Atomically Resolved Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_1938288              
2Departments of Chemistry and Physics, University of Toronto, ou_persistent22              

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 Abstract: Here, we present an optical fiber-based electron gun designed for the ultrafast streaking of low-energy electron bunches. The temporal profile of the few tens of the picosecond long electron bunch composed of 200 electrons is well characterized using a customized streak camera. Detailed analysis reveals that the stretched optical trigger pulse owing to the dispersion effects inside the waveguide dominantly determines the temporal length of the low density electron bunch. This result illustrates the capability to control the observable time-window in the streak diffraction experiment by tailoring geometrical parameters of the fiber source and its coupling condition. With the electrostatic Einzel lens system integrated on the fiber-based cathode, we also demonstrate spatial focusing of the electron beam with the RMS spot size of 98 μm and imaging of the static low-energy electron diffraction pattern of monolayer graphene in the electron kinetic energy range of 1.0–2.0 keV.

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Language(s): eng - English
 Dates: 2018-05-102018-09-052018-09-252018-09-24
 Publication Status: Published in print
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 Rev. Method: Peer
 Identifiers: DOI: 10.1063/1.5039737
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Title: Applied Physics Letters
  Abbreviation : Appl. Phys. Lett.
Source Genre: Journal
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Publ. Info: Melville, NY : American Institute of Physics
Pages: - Volume / Issue: 113 (13) Sequence Number: 133502 Start / End Page: - Identifier: ISSN: 0003-6951
CoNE: https://pure.mpg.de/cone/journals/resource/954922836223