WEZZPLS —  Contributed Orals: Novel Particle Sources and Acceleration Techniques   (22-May-19   15:00—16:00)
Chair: H.-S. Kang, PAL, Pohang, Kyungbuk, Republic of Korea
Paper Title Page
Experimental Demonstration of External Injection From a Linac into a LWFA with ~100% Capture Efficiency  
  • J.F. Hua, Y.C. Du, Y. Fang, S. Liu, W. Lu, C.H. Pai, B. Peng, Y.P. Wu, J. Zhang, Z. Zhou
    TUB, Beijing, People’s Republic of China
  Staging of conventional accelerators and advanced plasma-based accelerators can boost the beam energy while at the same time better control the beam quality, therefore it is essential for high-energy applications such as TeV-level colliders. Here we present the first successful demonstration of external injection from a linear accelerator (LINAC) into a laser wakefield accelerator (LWFA) and the subsequent acceleration with ~100% capture efficiency. Stable 31MeV, 20fC electron beams from the LINAC were velocity bunched to the length of ~15fs (r.m.s.) in the high-gradient photocathode RF gun and then external injected into the linear wakefield excited by the 10TW, 42fs laser. The experimental results show that nearly all the electrons can be mono-energetically accelerated and the maximum energy gain reaches 1.8MeV in a 6-mm long plasma, corresponding to an average gradient of about 300MV/m. High capture efficiency of external injection has also been systematically validated by 3D PIC simulations. This paves the way toward the development of high-energy particle accelerators for future colliders.  
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WEZZPLS2 EuPRAXIA, a Step Toward a Plasma-Wakefield Based Accelerator With High Beam Quality 2291
  • P.A.P. Nghiem, A. Chancé
    CEA-IRFU, Gif-sur-Yvette, France
  • D. Alesini, E. Chiadroni, M. Croia, A. Del Dotto, M. Ferrario, A. Giribono, R. Pompili, S. Romeo, V. Shpakov, A. Stella, C. Vaccarezza
    INFN/LNF, Frascati, Italy
  • A. Aschikhin, R.W. Aßmann, U. Dorda, A. Ferran Pousa, V. Libov, B. Marchetti, A. Martinez de la Ossa, D. Marx, P. Niknejadi, L. Schaper, E.N. Svystun, P.A. Walker, M.K. Weikum, J. Zhu
    DESY, Hamburg, Germany
  • T. Audet, B. Cros, P. Lee, G. Maynard
    CNRS LPGP Univ Paris Sud, Orsay, France
  • A. Beck, F. Massimo, A. Specka
    LLR, Palaiseau, France
  • M. Chen, S.M. Weng
    Shanghai Jiao Tong University, Shanghai, People’s Republic of China
  • A. Cianchi
    Università di Roma II Tor Vergata, Roma, Italy
  • J.A. Clarke
    STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
  • M.-E. Couprie, A. Ghaith, D. Oumbarek Espinos
    SOLEIL, Gif-sur-Yvette, France
  • G. Dattoli, F. Nguyen
    ENEA C.R. Frascati, Frascati (Roma), Italy
  • N. Delerue
    LAL, Orsay, France
  • R.A. Fonseca, L.O. Silva
    Instituto Superior Tecnico, Lisbon, Portugal
  • L.A. Gizzi, G. Toci, P. Tomassini
    INO-CNR, Pisa, Italy
  • A. Helm
    IST-UTL, Lisbon, Portugal
  • B. Hidding
    Cockcroft Institute, Warrington, Cheshire, United Kingdom
  • S.M. Hooker, R. Walczak
    Oxford University, Physics Department, Oxford, Oxon, United Kingdom
  • M.G. Ibison, M. Vujanovic, C.P. Welsch, J. Wolfenden
    The University of Liverpool, Liverpool, United Kingdom
  • D.A. Jaroszynski, F.Y. Li, Z.M. Sheng, S.M. Wiggins, S. Yoffe
    USTRAT/SUPA, Glasgow, United Kingdom
  • K.O. Kruchinin, A.Y. Molodozhentsev
    ELI-BEAMS, Prague, Czech Republic
  • L. Labate
    CNR/IPP, Pisa, Italy
  • X. Li
    DESY Zeuthen, Zeuthen, Germany
  • F. Mathieu
    LULI, Palaiseau, France
  • Z. Mazzotta
    Ecole Polytechnique, Palaiseau, France
  • T.J. Mehrling
    LBNL, Berkeley, USA
  • A. Mosnier, C. Simon
    CEA, Gif-sur-Yvette, France
  • A. Mostacci
    Rome University La Sapienza, Roma, Italy
  • Z. Najmudin
    Imperial College of Science and Technology, Department of Physics, London, United Kingdom
  • R. Pattathil, D. Symes
    STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
  • A.R. Rossi
    INFN-Milano, Milano, Italy
  • T. Silva, J.M. Vieira
    IPFN, Lisbon, Portugal
  • M.J.V. Streeter
    JAI, London, United Kingdom
  • D. Terzani
    UniNa, Napoli, Italy
  Funding: European Union’s Horizon 2020 research and innovation programme under grant agreement No. 653782
The EuPRAXIA project aims at designing the world’s first accelerator based on plasma-wakefield advanced technique, which can deliver a 5 GeV electron beam with simultaneously high charge, low emittance and low energy spread to user’s communities. Such challenging objectives can only have a chance to be achieved when particular efforts are dedicated to identify the subsequent issues and to find the way to solve them. Many injection/acceleration schemes and techniques have been explored by means of thorough simulations in more than ten European institutes to sort out the most appropriate ones. The specific issues of high charge, high beam quality and beam extraction then transfer to the user’s applications, have been tackled with many innovative approaches*. This article highlights the different advanced methods that have been employed by the EuPRAXIA collaboration and the preliminary results obtained. The needs in terms of laser and plasma parameters for such an accelerator are also summarized.
*- in 2017: Phys. Plasmas, 24,10,103120; Nat. Commun.8,15705; - in 2018: NIMA, 909,84-89; NIMA, 909,49-53; Phys. Rev.Acc. Beams, 21,111301; NIMA, 909,54-57; Phys. Rev.Acc. Beams, 21,052802; NIMA, 909,282-285
slides icon Slides WEZZPLS2 [5.157 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEZZPLS2  
About • paper received ※ 12 April 2019       paper accepted ※ 17 May 2019       issue date ※ 21 June 2019  
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WEZZPLS3 Longitudinal-Phase-Space Manipulation for Efficient Beam-Driven Structure Wakefield Acceleration 2296
SUSPFO040   use link to see paper's listing under its alternate paper code  
  • W.H. Tan, P. Piot
    Northern Illinois University, DeKalb, Illinois, USA
  • P. Piot
    Fermilab, Batavia, Illinois, USA
  • A. Zholents, A. Zholents
    ANL, Argonne, Illinois, USA
  Funding: This work is funded by the United States Department of Energy awards DE-SC0018656 with Northern Illinois University and DE-AC02-06CH11357 with Argonne National Laboratory.
Collinear beam-driven structure wakefield acceleration (SWFA) is an advanced acceleration technique that could support the compact generation of high-energy beams for future multi-user x-ray free-electron-laser facilities*. Producing an ideal shaped drive beam through phase space manipulation is crucial for an efficient SWFA. Controlling the final longitudinal-phase space of the drive beam necessitate staged beam manipulations during acceleration. This paper describes the preliminary design of an accelerator beamline capable of producing drive beam with tailored current distribution and longitudinal-phase-space correlation. The proposed design is based on simple analytical models combined in a 1-D longitudinal beam-dynamics simulation tracking program supporting forward and backward (time reversal) tracking.
* A. Zholents, et al., Dielectric wakefield accelerator to drive the future FEL light source
slides icon Slides WEZZPLS3 [2.869 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-WEZZPLS3  
About • paper received ※ 14 May 2019       paper accepted ※ 20 May 2019       issue date ※ 21 June 2019  
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