Journal Article

PUBDB-2019-02569

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Femtosecond phase control in high-field terahertz-driven ultrafast electron sources

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

2019
OSA Washington, DC

This record in other databases:        

Please use a persistent id in citations: doi:10.1364/OPTICA.6.000872  doi:10.3204/PUBDB-2019-02569

Abstract: Terahertz-based electron acceleration has recently emerged as a promising candidate for driving next-generation high-brightness electron sources. Although initial demonstrations have proven the feasibility of this technology for accelerating and manipulating the phase space of electrons, further demonstrations of exquisite timing control are required to make use of terahertz acceleration for demanding applications such as light sources and ultrafast electron diffraction. In this paper, we use a two-stage segmented-terahertz-electron-accelerator-and-manipulator (STEAM) setup to demonstrate control over the electron beam energy, energy spread, and emittance. The first rebunching stage is used to tune the duration of 55 keV electron bunches from a DC electron gun that enables femtosecond phase control at the second accelerating stage. For optimized parameters, energy spread and emittance are reduced by 4× and 6×, respectively, relative to operation with the first stage off. A record energy gain of ∼70 keV was achieved at a peak accelerating field of200 MV/m, resulting in a>100% energy boost in a terahertz-powered accelerator for the first time. These results represent a critical step forward for the practical implementation of terahertz-powered devices in ultrafast electron sources.

---

Contributing Institute(s):

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

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. ACHIP - Laser Accelerators on a Chip (ACHIP_2015-10-01) (ACHIP_2015-10-01)
4. CUI - Hamburger Zentrum für ultraschnelle Beobachtung (194651731) (194651731)
5. DFG project 281310551 - SOLSTICE - Festkörper in starken terahertz und infrarotenTräger-Einhüllende phasenstabilen Wellenformen (281310551) (281310551)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2019

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; IF >= 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---