Abstract
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.
Original language | English (US) |
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Article number | 033008 |
Journal | New Journal of Physics |
Volume | 20 |
Issue number | 3 |
DOIs | |
State | Published - Mar 2018 |
Externally published | Yes |
Keywords
- THz
- free electron lasers
- pulse characterization
- terahertz
- timing synchronization
- ultrafast
- x-ray
ASJC Scopus subject areas
- General Physics and Astronomy