| Autor: |
Chen, Pice, Jung, Il Woong, Walko, Donald A., Li, Zhilong, Gao, Ya, Shenoy, Gopal K., López, Daniel, Wang, Jin |
| Zdroj: |
Nature Communications; 3/11/2019, Vol. 10 Issue 1, p1-1, 1p |
| Abstrakt: |
Time-resolved and ultrafast hard X-ray imaging, scattering and spectroscopy are powerful tools for elucidating the temporal and spatial evolution of complexity in materials. However, their temporal resolution has been limited by the storage-ring timing patterns and X-ray pulse width at synchrotron sources. Here we demonstrate that dynamic X-ray optics based on micro-electro-mechanical-system resonators can manipulate hard X-ray pulses on time scales down to 300 ps, comparable to the X-ray pulse width from typical synchrotron sources. This is achieved by timing the resonators with the storage ring to diffract X-ray pulses through the narrow Bragg peak of the single-crystalline material. Angular velocities exceeding 107 degrees s−1 are reached while maintaining the maximum linear velocity well below the sonic speed and material breakdown limit. As the time scale of the devices shortens, the devices promise to spatially disperse the temporal width of X-rays, thus generating a temporal resolution below the pulse-width limit. It is desirable to improve spatiotemporal control of light generated by synchrotron user facilities or table-top X-ray sources. Here the authors demonstrate manipulation of hard X-rays using microelectro mechanical systems (MEMS) oscillators on timescales of 300 ps, approaching the synchrotron pulse width. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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