Femtosecond time-resolved MeV electron diffraction
Abstract
We report the experimental demonstration of femtosecond electron diffraction using high-brightness MeV electron beams. High-quality, single-shot electron diffraction patterns for both polycrystalline aluminum and single-crystal 1T-TaS2 are obtained utilizing a 5 fC (~3 × 104 electrons) pulse of electrons at 2.8 MeV. The high quality of the electron diffraction patterns confirms that electron beam has a normalized emittance of ~50 nm rad. The transverse and longitudinal coherence length is ~11 and ~2.5 nm, respectively. The timing jitter between the pump laser and probe electron beam was found to be ~100 fs (rms). The temporal resolution is demonstrated by observing the evolution of Bragg and superlattice peaks of 1T-TaS2 following an 800 nm optical pump and was found to be 130 fs. Lastly, our results demonstrate the advantages of MeV electrons, including large elastic differential scattering cross-section and access to high-order reflections, and the feasibility of ultimately realizing below 10 fs time-resolved electron diffraction.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States); Shanghai Jiao Tong Univ., Shanghai (People's Republic of China)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Florida State Univ., Tallahassee, FL (United States)
- IFW, Dresden (Germany)
- Brookhaven National Lab. (BNL), Upton, NY (United States); Shanghai Jiao Tong Univ., Shanghai (People's Republic of China); SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1307514
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- New Journal of Physics
- Additional Journal Information:
- Journal Volume: 17; Journal Issue: 6; Journal ID: ISSN 1367-2630
- Publisher:
- IOP Publishing
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 74 ATOMIC AND MOLECULAR PHYSICS; ultrafast electron diffraction; high-brightness electron beam; coherent length; ultrafast electron imaging
Citation Formats
Zhu, Pengfei, Zhu, Y., Hidaka, Y., Wu, L., Cao, J., Berger, H., Geck, J., Kraus, R., Pjerov, S., Shen, Y., Tobey, R. I., Hill, J. P., and Wang, X. J. Femtosecond time-resolved MeV electron diffraction. United States: N. p., 2015.
Web. doi:10.1088/1367-2630/17/6/063004.
Zhu, Pengfei, Zhu, Y., Hidaka, Y., Wu, L., Cao, J., Berger, H., Geck, J., Kraus, R., Pjerov, S., Shen, Y., Tobey, R. I., Hill, J. P., & Wang, X. J. Femtosecond time-resolved MeV electron diffraction. United States. https://doi.org/10.1088/1367-2630/17/6/063004
Zhu, Pengfei, Zhu, Y., Hidaka, Y., Wu, L., Cao, J., Berger, H., Geck, J., Kraus, R., Pjerov, S., Shen, Y., Tobey, R. I., Hill, J. P., and Wang, X. J. Tue .
"Femtosecond time-resolved MeV electron diffraction". United States. https://doi.org/10.1088/1367-2630/17/6/063004. https://www.osti.gov/servlets/purl/1307514.
@article{osti_1307514,
title = {Femtosecond time-resolved MeV electron diffraction},
author = {Zhu, Pengfei and Zhu, Y. and Hidaka, Y. and Wu, L. and Cao, J. and Berger, H. and Geck, J. and Kraus, R. and Pjerov, S. and Shen, Y. and Tobey, R. I. and Hill, J. P. and Wang, X. J.},
abstractNote = {We report the experimental demonstration of femtosecond electron diffraction using high-brightness MeV electron beams. High-quality, single-shot electron diffraction patterns for both polycrystalline aluminum and single-crystal 1T-TaS2 are obtained utilizing a 5 fC (~3 × 104 electrons) pulse of electrons at 2.8 MeV. The high quality of the electron diffraction patterns confirms that electron beam has a normalized emittance of ~50 nm rad. The transverse and longitudinal coherence length is ~11 and ~2.5 nm, respectively. The timing jitter between the pump laser and probe electron beam was found to be ~100 fs (rms). The temporal resolution is demonstrated by observing the evolution of Bragg and superlattice peaks of 1T-TaS2 following an 800 nm optical pump and was found to be 130 fs. Lastly, our results demonstrate the advantages of MeV electrons, including large elastic differential scattering cross-section and access to high-order reflections, and the feasibility of ultimately realizing below 10 fs time-resolved electron diffraction.},
doi = {10.1088/1367-2630/17/6/063004},
journal = {New Journal of Physics},
number = 6,
volume = 17,
place = {United States},
year = {Tue Jun 02 00:00:00 EDT 2015},
month = {Tue Jun 02 00:00:00 EDT 2015}
}
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