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Schramm U, Bussmann M, Irman A, Siebold M, Zeil K, Albach D, Bernert C, Bock S, Brack F, Branco J, Couperus JP, Cowan TE, Debus A, Eisenmann C, Garten M, Gebhardt R, Grams S, Helbig U, Huebl A, Kluge T, Köhler A, Krämer JM, Kraft S, Kroll F, Kuntzsch M, Lehnert U, Loeser M, Metzkes J, Michel P, Obst L, Pausch R, Rehwald M, Sauerbrey R, Schlenvoigt HP, Steiniger K, Zarini O. First results with the novel petawatt laser acceleration facility in Dresden. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1742-6596/874/1/012028] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Göde S, Rödel C, Zeil K, Mishra R, Gauthier M, Brack FE, Kluge T, MacDonald MJ, Metzkes J, Obst L, Rehwald M, Ruyer C, Schlenvoigt HP, Schumaker W, Sommer P, Cowan TE, Schramm U, Glenzer S, Fiuza F. Relativistic Electron Streaming Instabilities Modulate Proton Beams Accelerated in Laser-Plasma Interactions. Phys Rev Lett 2017; 118:194801. [PMID: 28548516 DOI: 10.1103/physrevlett.118.194801] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Indexed: 06/07/2023]
Abstract
We report experimental evidence that multi-MeV protons accelerated in relativistic laser-plasma interactions are modulated by strong filamentary electromagnetic fields. Modulations are observed when a preplasma is developed on the rear side of a μm-scale solid-density hydrogen target. Under such conditions, electromagnetic fields are amplified by the relativistic electron Weibel instability and are maximized at the critical density region of the target. The analysis of the spatial profile of the protons indicates the generation of B>10 MG and E>0.1 MV/μm fields with a μm-scale wavelength. These results are in good agreement with three-dimensional particle-in-cell simulations and analytical estimates, which further confirm that this process is dominant for different target materials provided that a preplasma is formed on the rear side with scale length ≳0.13λ_{0}sqrt[a_{0}]. These findings impose important constraints on the preplasma levels required for high-quality proton acceleration for multipurpose applications.
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Affiliation(s)
- S Göde
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- European XFEL GmbH, Holzkoppel 4, 22869 Schenefeld, Germany
| | - C Rödel
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743 Jena, Germany
| | - K Zeil
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - R Mishra
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - M Gauthier
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - F-E Brack
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - T Kluge
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - M J MacDonald
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- University of Michigan, Ann Arbor, Michigan 48109, USA
| | - J Metzkes
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - L Obst
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - M Rehwald
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - C Ruyer
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
- CEA, DAM, DIF, F-91297 Arpajon, France
| | - H-P Schlenvoigt
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
| | - W Schumaker
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - P Sommer
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - T E Cowan
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - U Schramm
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, Bautzner Landstr. 400, 01328 Dresden, Germany
- Technische Universität Dresden, 01062 Dresden, Germany
| | - S Glenzer
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - F Fiuza
- High Energy Density Science Division, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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Metzkes J, Zeil K, Kraft SD, Karsch L, Sobiella M, Rehwald M, Obst L, Schlenvoigt HP, Schramm U. An online, energy-resolving beam profile detector for laser-driven proton beams. Rev Sci Instrum 2016; 87:083310. [PMID: 27587116 DOI: 10.1063/1.4961576] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this paper, a scintillator-based online beam profile detector for the characterization of laser-driven proton beams is presented. Using a pixelated matrix with varying absorber thicknesses, the proton beam is spatially resolved in two dimensions and simultaneously energy-resolved. A thin plastic scintillator placed behind the absorber and read out by a CCD camera is used as the active detector material. The spatial detector resolution reaches down to ∼4 mm and the detector can resolve proton beam profiles for up to 9 proton threshold energies. With these detector design parameters, the spatial characteristics of the proton distribution and its cut-off energy can be analyzed online and on-shot under vacuum conditions. The paper discusses the detector design, its characterization and calibration at a conventional proton source, as well as the first detector application at a laser-driven proton source.
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Affiliation(s)
- J Metzkes
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
| | - K Zeil
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
| | - S D Kraft
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
| | - L Karsch
- OncoRay-National Center for Radiation Research in Oncology, Technische Universität Dresden, 01307 Dresden, Germany
| | - M Sobiella
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
| | - M Rehwald
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
| | - L Obst
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
| | - H-P Schlenvoigt
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
| | - U Schramm
- Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstr. 400, 01328 Dresden, Germany
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4
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Albertazzi B, Ciardi A, Nakatsutsumi M, Vinci T, Béard J, Bonito R, Billette J, Borghesi M, Burkley Z, Chen SN, Cowan TE, Herrmannsdörfer T, Higginson DP, Kroll F, Pikuz SA, Naughton K, Romagnani L, Riconda C, Revet G, Riquier R, Schlenvoigt HP, Skobelev IY, Faenov AY, Soloviev A, Huarte-Espinosa M, Frank A, Portugall O, Pépin H, Fuchs J. Laboratory formation of a scaled protostellar jet by coaligned poloidal magnetic field. Science 2014; 346:325-8. [PMID: 25324383 DOI: 10.1126/science.1259694] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Although bipolar jets are seen emerging from a wide variety of astrophysical systems, the issue of their formation and morphology beyond their launching is still under study. Our scaled laboratory experiments, representative of young stellar object outflows, reveal that stable and narrow collimation of the entire flow can result from the presence of a poloidal magnetic field whose strength is consistent with observations. The laboratory plasma becomes focused with an interior cavity. This gives rise to a standing conical shock from which the jet emerges. Following simulations of the process at the full astrophysical scale, we conclude that it can also explain recently discovered x-ray emission features observed in low-density regions at the base of protostellar jets, such as the well-studied jet HH 154.
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Affiliation(s)
- B Albertazzi
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France. Institut National de la Recherche Scientifique-Energie, Matériaux, Télécommunications (INRS-EMT), Varennes, Québec, Canada. Graduate School of Engineering, Osaka University, Suita 565-0871, Japan
| | - A Ciardi
- Sorbonne Universités, UPMC Université. Paris 06, UMR 8112, Laboratoire d'Etudes du Rayonnement et de la Matière en Astrophysique (LERMA), F-75005 Paris, France. Observatoire de Paris and CNRS, UMR 8112, LERMA, Paris, France
| | - M Nakatsutsumi
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France
| | - T Vinci
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France
| | - J Béard
- Laboratoire National des Champs magnétiques Intenses (LNCMI), UPR 3228, CNRS-Université Joseph Fourier (UJF)-Université Paul Sabatier (UPS)-Institut National des Sciences Appliquées (INSA), F-31400 Toulouse, France
| | - R Bonito
- Dipartimento di Fisica e Chimica, Università di Palermo, Piazza del Parlamento, I-1 90134 Palermo, Italy. National Institute for Astrophysics (INAF)-Osservatorio Astronomico di Palermo, Piazza del Parlamento, I-1 90134 Palermo, Italy
| | - J Billette
- Laboratoire National des Champs magnétiques Intenses (LNCMI), UPR 3228, CNRS-Université Joseph Fourier (UJF)-Université Paul Sabatier (UPS)-Institut National des Sciences Appliquées (INSA), F-31400 Toulouse, France
| | - M Borghesi
- School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, UK. Institute of Physics of the Academy of Science of the Czech Republic (ASCR), Extreme Light Infrastructure (ELI)-Beamlines Project, Na Slovance 2, 18221 Prague, Czech Republic
| | - Z Burkley
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France
| | - S N Chen
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France
| | - T E Cowan
- Technische Universität Dresden, D-01062 Dresden, Germany. Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, D-01328 Dresden, Germany
| | - T Herrmannsdörfer
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, D-01328 Dresden, Germany
| | - D P Higginson
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France
| | - F Kroll
- Technische Universität Dresden, D-01062 Dresden, Germany. Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, D-01328 Dresden, Germany
| | - S A Pikuz
- Joint Institute for High Temperatures Russian Academy of Science (RAS), Moscow 125412, Russia. National Research Nuclear University MEPhI, Moscow 115409, Russia
| | - K Naughton
- School of Mathematics and Physics, The Queen's University of Belfast, Belfast BT7 1NN, UK
| | - L Romagnani
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France
| | - C Riconda
- Sorbonne Universités, UPMC Université Paris 06, UMR 7605, LULI, F-75005 Paris, France
| | - G Revet
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France
| | - R Riquier
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France. CEA-Bruyères le Chatel, F-91297 Arpajon, France
| | - H-P Schlenvoigt
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, D-01328 Dresden, Germany
| | - I Yu Skobelev
- Joint Institute for High Temperatures Russian Academy of Science (RAS), Moscow 125412, Russia
| | - A Ya Faenov
- Joint Institute for High Temperatures Russian Academy of Science (RAS), Moscow 125412, Russia. Institute for Academic Initiatives, Osaka University, Suita, Osaka 565-0871, Japan
| | - A Soloviev
- Institute of Applied Physics, 46 Ulyanov Street, 603950 Nizhny Novgorod, Russia
| | - M Huarte-Espinosa
- Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA. Center for Advanced Computing and Data Systems, University of Houston, Houston, TX 77204, USA
| | - A Frank
- Department of Physics and Astronomy, University of Rochester, Rochester, NY, USA
| | - O Portugall
- Laboratoire National des Champs magnétiques Intenses (LNCMI), UPR 3228, CNRS-Université Joseph Fourier (UJF)-Université Paul Sabatier (UPS)-Institut National des Sciences Appliquées (INSA), F-31400 Toulouse, France
| | - H Pépin
- Institut National de la Recherche Scientifique-Energie, Matériaux, Télécommunications (INRS-EMT), Varennes, Québec, Canada
| | - J Fuchs
- Laboratoire d'Utilisation des Lasers Intenses (LULI), École Polytechnique, CNRS, Commissariat à l'Energie atomique et aux énergies alternatives (CEA), Université Pierre et Marie Curie (UPMC), F-91128 Palaiseau, France. Institute of Applied Physics, 46 Ulyanov Street, 603950 Nizhny Novgorod, Russia.
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5
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Jochmann A, Irman A, Bussmann M, Couperus JP, Cowan TE, Debus AD, Kuntzsch M, Ledingham KWD, Lehnert U, Sauerbrey R, Schlenvoigt HP, Seipt D, Stöhlker T, Thorn DB, Trotsenko S, Wagner A, Schramm U. High resolution energy-angle correlation measurement of hard x rays from laser-Thomson backscattering. Phys Rev Lett 2013; 111:114803. [PMID: 24074095 DOI: 10.1103/physrevlett.111.114803] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Indexed: 06/02/2023]
Abstract
Thomson backscattering of intense laser pulses from relativistic electrons not only allows for the generation of bright x-ray pulses but also for the investigation of the complex particle dynamics at the interaction point. For this purpose a complete spectral characterization of a Thomson source powered by a compact linear electron accelerator is performed with unprecedented angular and energy resolution. A rigorous statistical analysis comparing experimental data to 3D simulations enables, e.g., the extraction of the angular distribution of electrons with 1.5% accuracy and, in total, provides predictive capability for the future high brightness hard x-ray source PHOENIX (photon electron collider for narrow bandwidth intense x rays) and potential gamma-ray sources.
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Affiliation(s)
- A Jochmann
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden - Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany and Technische Universität Dresden, 01062 Dresden, Germany
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6
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Scott RHH, Clark EL, Pérez F, Streeter MJV, Davies JR, Schlenvoigt HP, Santos JJ, Hulin S, Lancaster KL, Baton SD, Rose SJ, Norreys PA. Measuring fast electron spectra and laser absorption in relativistic laser-solid interactions using differential bremsstrahlung photon detectors. Rev Sci Instrum 2013; 84:083505. [PMID: 24007063 DOI: 10.1063/1.4816332] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A photon detector suitable for the measurement of bremsstrahlung spectra generated in relativistically intense laser-solid interactions is described. The Monte Carlo techniques used to extract the fast electron spectrum and laser energy absorbed into forward-going fast electrons are detailed. A relativistically intense laser-solid experiment using frequency doubled laser light is used to demonstrate the effective operation of the detector. The experimental data were interpreted using the 3-spatial-dimension Monte Carlo code MCNPX [D. Pelowitz, MCNPX User's Manual Version 2.6.0, Los Alamos National Laboratory, 2008], and the fast electron temperature found to be 125 keV.
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Affiliation(s)
- R H H Scott
- Central Laser Facility, STFC, Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom
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7
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Albertazzi B, Béard J, Ciardi A, Vinci T, Albrecht J, Billette J, Burris-Mog T, Chen SN, Da Silva D, Dittrich S, Herrmannsdörfer T, Hirardin B, Kroll F, Nakatsutsumi M, Nitsche S, Riconda C, Romagnagni L, Schlenvoigt HP, Simond S, Veuillot E, Cowan TE, Portugall O, Pépin H, Fuchs J. Production of large volume, strongly magnetized laser-produced plasmas by use of pulsed external magnetic fields. Rev Sci Instrum 2013; 84:043505. [PMID: 23635194 DOI: 10.1063/1.4795551] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The production of strongly magnetized laser plasmas, of interest for laboratory astrophysics and inertial confinement fusion studies, is presented. This is achieved by coupling a 16 kV pulse-power system. This is achieved by coupling a 16 kV pulse-power system, which generates a magnetic field by means of a split coil, with the ELFIE laser facility at Ecole Polytechnique. In order to influence the plasma dynamics in a significant manner, the system can generate, repetitively and without debris, high amplitude magnetic fields (40 T) in a manner compatible with a high-energy laser environment. A description of the system and preliminary results demonstrating the possibility to magnetically collimate plasma jets are given.
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Affiliation(s)
- B Albertazzi
- LULI, École Polytechnique, CNRS, CEA, UPMC, 91128 Palaiseau, France.
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8
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Vauzour B, Santos JJ, Debayle A, Hulin S, Schlenvoigt HP, Vaisseau X, Batani D, Baton SD, Honrubia JJ, Nicolaï P, Beg FN, Benocci R, Chawla S, Coury M, Dorchies F, Fourment C, d'Humières E, Jarrot LC, McKenna P, Rhee YJ, Tikhonchuk VT, Volpe L, Yahia V. Relativistic high-current electron-beam stopping-power characterization in solids and plasmas: collisional versus resistive effects. Phys Rev Lett 2012; 109:255002. [PMID: 23368474 DOI: 10.1103/physrevlett.109.255002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2012] [Indexed: 06/01/2023]
Abstract
We present experimental and numerical results on intense-laser-pulse-produced fast electron beams transport through aluminum samples, either solid or compressed and heated by laser-induced planar shock propagation. Thanks to absolute K(α) yield measurements and its very good agreement with results from numerical simulations, we quantify the collisional and resistive fast electron stopping powers: for electron current densities of ≈ 8 × 10(10) A/cm(2) they reach 1.5 keV/μm and 0.8 keV/μm, respectively. For higher current densities up to 10(12)A/cm(2), numerical simulations show resistive and collisional energy losses at comparable levels. Analytical estimations predict the resistive stopping power will be kept on the level of 1 keV/μm for electron current densities of 10(14)A/cm(2), representative of the full-scale conditions in the fast ignition of inertially confined fusion targets.
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Affiliation(s)
- B Vauzour
- Univ Bordeaux, CNRS, CEA, CELIA, Centre Lasers Intenses et Applications, UMR 5107, F-33405 Talence, France
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9
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Scott RHH, Beaucourt C, Schlenvoigt HP, Markey K, Lancaster KL, Ridgers CP, Brenner CM, Pasley J, Gray RJ, Musgrave IO, Robinson APL, Li K, Notley MM, Davies JR, Baton SD, Santos JJ, Feugeas JL, Nicolaï P, Malka G, Tikhonchuk VT, McKenna P, Neely D, Rose SJ, Norreys PA. Controlling fast-electron-beam divergence using two laser pulses. Phys Rev Lett 2012; 109:015001. [PMID: 23031109 DOI: 10.1103/physrevlett.109.015001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2011] [Revised: 04/18/2012] [Indexed: 06/01/2023]
Abstract
This Letter describes the first experimental demonstration of the guiding of a relativistic electron beam in a solid target using two colinear, relativistically intense, picosecond laser pulses. The first pulse creates a magnetic field that guides the higher-current, fast-electron beam generated by the second pulse. The effects of intensity ratio, delay, total energy, and intrinsic prepulse are examined. Thermal and Kα imaging show reduced emission size, increased peak emission, and increased total emission at delays of 4-6 ps, an intensity ratio of 10∶1 (second:first) and a total energy of 186 J. In comparison to a single, high-contrast shot, the inferred fast-electron divergence is reduced by 2.7 times, while the fast-electron current density is increased by a factor of 1.8. The enhancements are reproduced with modeling and are shown to be due to the self-generation of magnetic fields. Such a scheme could be of considerable benefit to fast-ignition inertial fusion.
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Affiliation(s)
- R H H Scott
- Department of Physics, The Blackett Laboratory, Imperial College London, Prince Consort Road, London, SW7 2AZ, United Kingdom.
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10
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Baton SD, Koenig M, Brambrink E, Schlenvoigt HP, Rousseaux C, Debras G, Laffite S, Loiseau P, Philippe F, Ribeyre X, Schurtz G. Experiment in planar geometry for shock ignition studies. Phys Rev Lett 2012; 108:195002. [PMID: 23003050 DOI: 10.1103/physrevlett.108.195002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2011] [Indexed: 06/01/2023]
Abstract
The capacity to launch a strong shock wave in a compressed target in the presence of large preplasma has been investigated experimentally and numerically in a planar geometry. The experiment was performed on the LULI 2000 laser facility using one laser beam to compress the target and a second to launch the strong shock simulating the intensity spike in the shock ignition scheme. Thanks to a large set of diagnostics, it has been possible to compare accurately experimental results with 2D numerical simulations. A good agreement has been observed even if a more detailed study of the laser-plasma interaction for the spike is necessary in order to confirm that this scheme is a possible alternative for inertial confinement fusion.
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Affiliation(s)
- S D Baton
- LULI, École Polytechnique, CNRS, CEA, UPMC, route de Saclay, F-91128 Palaiseau, France
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11
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Kaluza MC, Schlenvoigt HP, Mangles SPD, Thomas AGR, Dangor AE, Schwoerer H, Mori WB, Najmudin Z, Krushelnick KM. Measurement of magnetic-field structures in a laser-wakefield accelerator. Phys Rev Lett 2010; 105:115002. [PMID: 20867577 DOI: 10.1103/physrevlett.105.115002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Indexed: 05/29/2023]
Abstract
Experimental measurements of magnetic fields generated in the cavity of a self-injecting laser-wakefield accelerator are presented. Faraday rotation is used to determine the existence of multimegagauss fields, constrained to a transverse dimension comparable to the plasma wavelength ∼λp and several λp longitudinally. The fields are generated rapidly and move with the driving laser. In our experiment, the appearance of the magnetic fields is correlated with the production of relativistic electrons, indicating that they are inherently tied to the growth and wave breaking of the nonlinear plasma wave. This evolution is confirmed by numerical simulations, showing that these measurements provide insight into the wakefield evolution with high spatial and temporal resolution.
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Affiliation(s)
- M C Kaluza
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, 07743 Jena, Germany
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Schwoerer H, Liesfeld B, Schlenvoigt HP, Amthor KU, Sauerbrey R. Thomson-backscattered x rays from laser-accelerated electrons. Phys Rev Lett 2006; 96:014802. [PMID: 16486464 DOI: 10.1103/physrevlett.96.014802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2005] [Indexed: 05/06/2023]
Abstract
We present the first observation of Thomson-backscattered light from laser-accelerated electrons. In a compact, all-optical setup, the "photon collider," a high-intensity laser pulse is focused into a pulsed He gas jet and accelerates electrons to relativistic energies. A counterpropagating laser probe pulse is scattered from these high-energy electrons, and the backscattered x-ray photons are spectrally analyzed. This experiment demonstrates a novel source of directed ultrashort x-ray pulses and additionally allows for time-resolved spectroscopy of the laser acceleration of electrons.
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Affiliation(s)
- H Schwoerer
- Institut für Optik und Quantenelektronik, Friedrich-Schiller-Universität, Max-Wien-Platz 1, 07743 Jena, Germany
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