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Title: Imaging nanoscale spatial modulation of a relativistic electron beam with a MeV ultrafast electron microscope

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.5023179· OSTI ID:1439294
 [1];  [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [2];  [2];  [3];  [4]; ORCiD logo [5];  [6];  [1]
  1. Shanghai Jiao Tong Univ., Shanghai (China)
  2. Peking Univ., Beijing (China)
  3. Peking Univ., Beijing (China); Southern Univ. of Science and Technology, Shenzhen (China)
  4. ShanghaiTech Univ., Shanghai (China)
  5. Brookhaven National Lab. (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States)
  6. Shanghai Jiao Tong Univ., Shanghai (China); Tsung-Dao Lee Institute, Shanghai (China)

Here, an accelerator-based MeV ultrafast electron microscope (MUEM) has been proposed as a promising tool to the study structural dynamics at the nanometer spatial scale and the picosecond temporal scale. Here, we report experimental tests of a prototype MUEM where high quality images with nanoscale fine structures were recorded with a pulsed ~3 MeV picosecond electron beam. The temporal and spatial resolutions of the MUEM operating in the single-shot mode are about 4 ps (FWHM) and 100 nm (FWHM), corresponding to a temporal-spatial resolution of 4 × 10–19 sm, about 2 orders of magnitude higher than that achieved with state-of-the-art single-shot keV UEM. Using this instrument, we offer the demonstration of visualizing the nanoscale periodic spatial modulation of an electron beam, which may be converted into longitudinal density modulation through emittance exchange to enable production of high-power coherent radiation at short wavelengths. Our results mark a great step towards single-shot nanometer-resolution MUEMs and compact intense x-ray sources that may have widespread applications in many areas of science.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1439294
Report Number(s):
BNL-205702-2018-JAAM; TRN: US1900595
Journal Information:
Applied Physics Letters, Vol. 112, Issue 11; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

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Figures / Tables (5)