期刊
NEW JOURNAL OF PHYSICS
卷 20, 期 -, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/aab548
关键词
free electron lasers; timing synchronization; pulse characterization; ultrafast; x-ray; THz; terahertz
资金
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-76SF00515]
- Science Foundation Ireland IvP Grant [12/IA/1742]
- Bavaria California Technology Center (BaCaTeC)
- NSF [1231306]
- US NSF [PHY-1004778]
- US DOE [DE-FG02-04ER15614]
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences, and Biosciences [DE-AC02-06CH11357]
- Deutsche Forschungsgemeinschaft (DFG) [SFB925/A1]
- Volkswagen foundation within the Peter Paul Ewald-Fellowship
- EUEMJD 'EXTATIC' [FPA-2012-0033]
- [NRF-2014M3C1A8048818]
- [NRF-2014M1A7A1A01030128]
- [NRF-2016K1A3A7A09005386]
- [BMBF-05K16GU2]
- U.S. Department of Energy (DOE) [DE-FG02-04ER15614] Funding Source: U.S. Department of Energy (DOE)
- Science Foundation Ireland (SFI) [12/IA/1742] Funding Source: Science Foundation Ireland (SFI)
- Direct For Mathematical & Physical Scien
- Division Of Physics [1605042] Funding Source: National Science Foundation
Arbitrary manipulation of the temporal and spectral properties of x-ray pulses at free-electron lasers would revolutionize many experimental applications. At the Linac Coherent Light Source at Stanford National Accelerator Laboratory, the momentum phase-space of the free-electron laser driving electron bunch can be tuned to emit a pair of x-ray pulses with independently variable photon energy and femtosecond delay. However, while accelerator parameters can easily be adjusted to tune the electron bunch phase-space, the final impact of these actuators on the x-ray pulse cannot be predicted with sufficient precision. Furthermore, shot-to-shot instabilities that distort the pulse shape unpredictably cannot be fully suppressed. Therefore, the ability to directly characterize the x-rays is essential to ensure precise and consistent control. In this work, we have generated x-ray pulse pairs via electron bunch shaping and characterized them on a single-shot basis with femtosecond resolution through time-resolved photoelectron streaking spectroscopy. This achievement completes an important step toward future x-ray pulse shaping techniques.
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