3 years ago

Segmented Terahertz Electron Accelerator and Manipulator (STEAM).

Yi Hua, Xiaojun Wu, Arya Fallahi, Nicholas H. Matlis, Dongfang Zhang, Anne-Laure Calendron, Franz X. Kärtner, Luis E. Zapata, Huseyin Cankaya, Moein Fakhari, Michael Hemmer

Acceleration and manipulation of ultrashort electron bunches are the basis behind electron and X-ray devices used for ultrafast, atomic-scale imaging and spectroscopy. Using laser-generated THz drivers enables intrinsic synchronization as well as dramatic gains in field strengths, field gradients and component compactness, leading to shorter electron bunches, higher spatio-temporal resolution and smaller infrastructures. We present a segmented THz electron accelerator and manipulator (STEAM) with extended interaction lengths capable of performing multiple high-field operations on the energy and phase-space of ultrashort bunches with moderate charge. With this single device, powered by few-microjoule, single-cycle, 0.3 THz pulses, we demonstrate record THz-device acceleration of >30 keV, streaking with <10 fs resolution, focusing with >2 kT/m strengths, compression to ~100 fs as well as real-time switching between these modes of operation. The STEAM device demonstrates the feasibility of future THz-based compact electron guns, accelerators, ultrafast electron diffractometers and Free-Electron Lasers with transformative impact.

Publisher URL: http://arxiv.org/abs/1711.03024

DOI: arXiv:1711.03024v1

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