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of 558
pro vyhledávání: '"R K Li"'
Autor:
Y. N. Yang, A. Fisher, P. Musumeci, R. K. Li, M. Kravchenko, R. Agustsson, Y. Chen, A. Murokh
Publikováno v:
Physical Review Accelerators and Beams, Vol 27, Iss 10, p 100701 (2024)
Using a waveguide in a THz FEL has been shown to maximize the coupling and enable efficient extraction of relativistic electron beam energy from a single passage through a tapered helical undulator. An oscillator configuration can further boost energ
Externí odkaz:
https://doaj.org/article/30fa9725c6644d9faa8d0554fcce4e3a
Publikováno v:
Structural Dynamics, Vol 11, Iss 2, Pp 024302-024302-11 (2024)
Ultrafast electron diffraction (UED) stands as a powerful technique for real-time observation of structural dynamics at the atomic level. In recent years, the use of MeV electrons from radio frequency guns has been widely adopted to take advantage of
Externí odkaz:
https://doaj.org/article/d1fa517167ac424cb60bf98291cf58c6
Autor:
K Sokolowski-Tinten, R K Li, A H Reid, S P Weathersby, F Quirin, T Chase, R Coffee, J Corbett, A Fry, N Hartmann, C Hast, R Hettel, M Horn von Hoegen, D Janoschka, J R Lewandowski, M Ligges, F Meyer zu Heringdorf, X Shen, T Vecchione, C Witt, J Wu, H A Dürr, X J Wang
Publikováno v:
New Journal of Physics, Vol 17, Iss 11, p 113047 (2015)
Electron–phonon coupling processes determine electronic transport properties of materials and are responsible for the transfer of electronic excess energy to the lattice. With decreasing device dimensions an understanding of these processes in nano
Externí odkaz:
https://doaj.org/article/0b110471d09448478ef653fdf40ff992
Autor:
X J, Deng, Y, Zhang, Z L, Pan, Z Z, Li, J H, Bian, C Y, Tsai, R K, Li, A W, Chao, W H, Huang, C X, Tang
Publikováno v:
Journal of Synchrotron Radiation. 30:35-50
A promising accelerator light source mechanism called steady-state microbunching (SSMB) is being actively studied. With the combination of strong coherent radiation from microbunching and high repetition rate of a storage ring, high-average-power nar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5110b4fb0f646c22f1d40c0c39a6ea94
https://doi.org/10.1107/s1600577522009973
https://doi.org/10.1107/s1600577522009973
Autor:
A. H. Reid, X. Shen, P. Maldonado, T. Chase, E. Jal, P. W. Granitzka, K. Carva, R. K. Li, J. Li, L. Wu, T. Vecchione, T. Liu, Z. Chen, D. J. Higley, N. Hartmann, R. Coffee, J. Wu, G. L. Dakovski, W. F. Schlotter, H. Ohldag, Y. K. Takahashi, V. Mehta, O. Hellwig, A. Fry, Y. Zhu, J. Cao, E. E. Fullerton, J. Stöhr, P. M. Oppeneer, X. J. Wang, H. A. Dürr
Publikováno v:
Nature Communications, Vol 9, Iss 1, Pp 1-9 (2018)
Although magnetostriction is universal in magnetic materials, understanding its microscopic origin remains challenging. Here the authors use X-ray and ultrafast electron diffraction to separate the material’s sub-picosecond spin and lattice respons
Externí odkaz:
https://doaj.org/article/9c806111a79449ffb41666dc3136ec7e
Autor:
X. Shen, J. P. F. Nunes, J. Yang, R. K. Jobe, R. K. Li, Ming-Fu Lin, B. Moore, M. Niebuhr, S. P. Weathersby, T. J. A. Wolf, C. Yoneda, Markus Guehr, Martin Centurion, X. J. Wang
Publikováno v:
Structural Dynamics, Vol 6, Iss 5, Pp 054305-054305-9 (2019)
The development of ultrafast gas electron diffraction with nonrelativistic electrons has enabled the determination of molecular structures with atomic spatial resolution. It has, however, been challenging to break the picosecond temporal resolution b
Externí odkaz:
https://doaj.org/article/e721e152a48b4e19a3075107ca6bcd06
Akademický článek
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Akademický článek
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Autor:
K. Sokolowski-Tinten, X. Shen, Q. Zheng, T. Chase, R. Coffee, M. Jerman, R. K. Li, M. Ligges, I. Makasyuk, M. Mo, A. H. Reid, B. Rethfeld, T. Vecchione, S. P. Weathersby, H. A. Dürr, X. J. Wang
Publikováno v:
Structural Dynamics, Vol 4, Iss 5, Pp 054501-054501-8 (2017)
We apply time-resolved MeV electron diffraction to study the electron-lattice energy relaxation in thin film Au-insulator heterostructures. Through precise measurements of the transient Debye-Waller-factor, the mean-square atomic displacement is dire
Externí odkaz:
https://doaj.org/article/3c832d2e2b7f4b689b53b62132575bdc
Autor:
L. Le Guyader, T. Chase, A. H. Reid, R. K. Li, D. Svetin, X. Shen, T. Vecchione, X. J. Wang, D. Mihailovic, H. A. Dürr
Publikováno v:
Structural Dynamics, Vol 4, Iss 4, Pp 044020-044020-7 (2017)
Transitions between different charge density wave (CDW) states in quasi-two-dimensional materials may be accompanied also by changes in the inter-layer stacking of the CDW. Using MeV ultrafast electron diffraction, the out-of-plane stacking order
Externí odkaz:
https://doaj.org/article/1c44a629ec2543ff8692969f06971476