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Perspectives of Plasma-Wakefield Acceleration basics perspectives state-of-the-art brief overview of various projects F. Grüner, Universität Hamburg &

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Presentation on theme: "Perspectives of Plasma-Wakefield Acceleration basics perspectives state-of-the-art brief overview of various projects F. Grüner, Universität Hamburg &"— Presentation transcript:

1 Perspectives of Plasma-Wakefield Acceleration basics perspectives state-of-the-art brief overview of various projects F. Grüner, Universität Hamburg & Center for Free-Electron Laser Science

2 basic principle of any accelerator one needs an electric field… charge separation +- electron - …charged particles are then accelerated

3 First X-ray FEL (2009): Stanford, USA kilometer long!!!!.... accelerators can be quite large…

4 plasma cell: cm short!!!!.... but also quite small… lab setup of a Laser-Plasma-Accelerator at MPQ (S. Karsch et al.) pulse of a high- Power laser

5 plasma wakefield acceleration high-intensity laser: ~ 5 J / 25 fs plasma (capillary) laser pulse with relativistic intensity typical length scale = plasma wavelength wake plasma E z ~ TV/m ~ 5 fs PIC simulation (M. Geissler)

6 EuroNNAc CERN, May 2011, top 5 goals, among them - „table-top“ XFEL - 10 GeV stage - stable operation 24/7 brilliant X-ray sources „at home“, added values: - intrinsic synchronization (driver laser, X-ray pulse, few fs) - compact enough for hospitals: medical applications - higher peak currents (above 20 pC/4 fs) high-energy physics - TeV machine - sure enough, many open questions (emittance growth, staging, timing/pointing for ~100 stages, efficiency,…..) perspectives Leemans & Esarey, Physics Today, March 2009 ~ 16 m

7 before 2000: theory on LWFA, experiments with „thermal“ energy spectra 2000 theory of bubble acceleration (Meyer-ter-Vehn & Pukhov, MPQ): needs stronger laser 2004 first experimental results, peaked energy spectra (LBNL, LOA, RAL, Nature) 2006 Berkeley lab reaches 1.0 GeV (W. Leemans et al., Nature Physics) 2008 stability improvement (e.g., J. Osterhoff et al., PRL) 2009 first laser-driven soft X-ray undulator source (F. Grüner et al., Nature Physics) 2010-… diagnostics: bunch length, emittance, position behind laser new injection schemes: down-ramp, counter-propagating lasers, ionization, shock-front state of the art courtesy of S. Karsch

8 open questions how does it all work? key questions - emittance growth - energy spread - injection - beam loading - exit into vacuum - staging scalable? selft-consistent analytical treatments too complex → PIC codes but: PIC codes suffer from - idealistic modelling - numerical heating - resolution issues (space charge)

9 PWA worldwide Prominent LWFA results LOA Imperial College Rutherford Lab Strathclyde Oxford Imperial College Rutherford Lab Strathclyde Oxford Düsseldorf Jena Dresden Munich Hamburg Düsseldorf Jena Dresden Munich Hamburg JAEA, Nara APRI Lund Berkeley Lincoln Ann Arbor Austin Livermore Berkeley Lincoln Ann Arbor Austin Livermore Bejing Shanghai … Bejing Shanghai … Frascati

10 research clusters in Germany namestartrun timepartners TransRegio x 4 yearsDüsseldorf, Jena, LMU, MPQ, MBI MAP Cluster of Excellence years follow-up proposal 2011 LMU, MPQ, TUM Helmholtz Association: ARD , then PoF3HZDR, DESY, HI Jena, UHH, CFEL CALA2011new university institute building ready, start 2013 LMU, TUM LMU, MPQ MBI Düssel- dorf Jena HZDR DESY, UHH/ CFEL

11 Düsseldorf (Oswald Willi et al.) Düssel- dorf lasers10 TW TW TW (25 fs) all synchronized planned upgrades: 100 → 200 TW; XPW (10 12 contrast) current electron beams gas jets: 330 MeV gas targets (5-15 mm): stable 110 MeV researchtesting microchips for outer space staging of plasma accelerators theory + simulations

12 Jena (Malte Kaluza et al.) lasersJETI: 32 TW (25 fs) on target, plasma mirrors for >10 12 contrast planned upgrade: J current electron beams 300 MeV energy spread 1-2 % charge 1-15 pC researchlight sources (THz, betatron, undulator) cell irradiation e-beam diagnostics (with MPQ) highlightdirect observation of electrons inside bubble Jena M. Kaluza et al., PRL 2010 A. Buck et al., Nature Phys. (2011)

13 Max-Born Insitute (Berlin) (Matthias Schnürer et al.) lasers100 TW (25 fs) coupled with 30 TW (45 fs) current electron beams so far ion acceleration electrons start in 2012 research(plasma) pump (ion/photon) probe experiments staging of plasma accelerators highlightrecord efficiency for laser into ion energy MBI

14 HZDR (Dresden) (Ulrich Schramm et al.) HZDR lasers150 TW (25-30 fs) upgrade: 500 TW (25-30 fs), PW end of 2013 current electron beams so far ion acceleration electron acceleration started; joint experiments with DESY/UHH researchinjection of external ELBE beam (100 fs)

15 LMU/MPQ (Munich) (S. Karsch, L. Veisz, F. Grüner, et al.) lasersATLAS: 100 TW (25 fs, Ti:Sapph) LWS-20: 16 TW (8 fs, OPCPA) planned upgrades: LWS-100 (5 fs) ATLAS-3000, PFS: 5J/5fs/1kHz (in CALA) current electron beams LWS-20: MeV, 5-6 fs (measured) ATLAS: >500 MeV, >100 pC researche-beam diagnostics (bunch length, emittance) light sources (undulator, table-top FEL design, medical imaging) theory + simulation highlighthighly stable MeV electrons first laser-driven soft X-ray undulator source LMU, MPQ M. Fuchs,…, J. Osterhoff, …,S. Karsch, F. Grüner, Nature Phys. 5, 826 (2009)

16 LAOLA = DESY+UHH+CFEL (laola.desy.de) DESY, UHH, CFEL laserMarch 2013: 200 TW (5J / 25 fs) planned projects combining modern accelerators with PWA: beam-driven self-modulation (PITZ) transformer ratio studies (PITZ+FLASH) external injection (REGAE+FLASH) cooperations ARD (Dresden+Jena) MAP SLAC + Berkeley MBI MPP JAI

17 summary PWA emerging field: ultra-high gradients + ultra-short bunches perspectives: compact light sources, high-energy colliders….. still many open question: beam quality… increasing national and international activities merging with conventional, modern accelerators


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