Journal Article

PUBDB-2020-00667

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Cascaded multi-cycle terahertz driven ultrafast electron acceleration and manipulation

Zhang, D. (Corresponding author)CFEL*DESY* ; Fakhari, M.CFEL*Extern* ; Cankaya, H.CFEL*Extern* ; Calendron, A.-L.CFEL*DESY* ; Matlis, N.CFEL*DESY* ; Kärtner, F.CFEL*Extern*DESY*

2020
APS College Park, Md.

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Please use a persistent id in citations: doi:10.1103/PhysRevX.10.011067  doi:10.3204/PUBDB-2020-00667

Abstract: Terahertz (THz)-based electron acceleration and manipulation has recently been shown to be feasible and to hold tremendous promise as a technology for the development of next-generation, compact electron sources. Previous work has concentrated on structures powered transversely by short, single-cycle THz pulses, with mm-scale, segmented interaction regions that are ideal for acceleration of electrons in the sub- to few-MeV range where electron velocities vary significantly. However, in order to extend this technology to the multi-MeV range, investigation of approaches supporting longer interaction lengths is needed. Here, we demonstrate first steps in electron acceleration and manipulation using dielectrically-lined waveguides powered by temporally long, narrowband, multi-cycle THz pulses that co-propagate with the electrons. This geometry offers centimeter-scale single stage interaction lengths and offers the opportunity to further increase interaction lengths by cascading acceleration stages that recycle the THz energy and rephase the interaction. We prove the feasibility of THz-energy recycling for the first time by demonstrating acceleration, compression and focusing in two sequential Al2O3-based dielectric capillary stages powered by the same multi-cycle THz pulse. Since the multi-cycle THz energy achievable using laser-based sources is currently a limiting factor for the maximum electron acceleration, recycling the THz pulses provides a key factor for reaching relativistic energies with existing sources and paves the way for applications in future ultrafast electron diffraction and free-electron lasers.

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Contributing Institute(s):

1. FS-CFEL-2 (CFEL-UFOX)
2. Ultrafast Lasers & X-rays Division (FS-CFEL-2)

Research Program(s):

1. 631 - Accelerator R & D (POF3-631) (POF3-631)
2. AXSIS - Frontiers in Attosecond X-ray Science: Imaging and Spectroscopy (609920) (609920)
3. DFG project 390715994 - EXC 2056: CUI: Advanced Imaging of Matter (390715994) (390715994)
4. DFG project 194651731 - EXC 1074: Hamburger Zentrum für ultraschnelle Beobachtung (CUI): Struktur, Dynamik und Kontrolle von Materie auf atomarer Skala (194651731) (194651731)
5. ACHIP - Laser Accelerators on a Chip (ACHIP_2015-10-01) (ACHIP_2015-10-01)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2020

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Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF >= 10 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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