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Exploring novel target structures for manipulating relativistic laser–plasma interaction

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High Power Laser science and engineering 2017年第2期5卷 63-71页

作者： Liangliang Ji sheng Jiang Alexander pukhov Richard freeman Kramer Akli physics Department The Ohio State UniversityColumbusOH 43210USA state Key Laboratory of High field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Collaborative Innovation Center oflfsA(CICIfsA) Shanghai Jiao Tong UniversityShanghai 200240China Institut fur Theoretische PhysikⅠ Heinrieh-Heine-Universitat Dusseldorf40225 DusseldorfGermany

The improved laser-to-pedestal contrast ratio enabled by current high-power laser pulse cleaning techniques allows the fine features of the target survive before the main laser pulse arrives. We propose to introduce the nano-fabrication technologies into laser–plasma interaction to explore the novel effects of micro-structures. We found out that not only laser-driven particle sources but also the laser pulse itself can be manipulated by specifically designed micro-cylinder and-tube targets, respectively. The proposal was supported by full-3D particle-in-cell simulations and successful proofof-principle experiments for the first time. We believe this would open a way to manipulate relativistic laser–plasma interaction at the micro-size level.

关键词： electron acceleration laser–plasma interaction micro-structured targets

Compact laser wakefield acceleration toward high energy with micro-plasma parabola

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Matter and Radiation at Extremes 2024年第6期9卷 53-60页

作者： xuesong Geng Tongjun xu Lingang Zhang Igor Kostyukov Alexander pukhov Baifei shen Liangliang Ji state Key Laboratory of High field Laser Physics and CAs Center for Excellence in Ultra-Intense Laser science Shanghai Institute of Optics and Fine Mechanics(SIOM)Chinese Academy of Sciences(CAS)Shanghai 201800China Institute for Applied Physics of Russian Academy of sciences 603155 Nizhni NovgorodRussia Institut für Theoretische Physik Ⅰ Universität DüsseldorfDüsseldorf 40225Germany shanghai Normal University Shanghai 200234China

Laser wakefield acceleration(LWfA)promises compact accelerators toward the high-energy ***,the approach to the 100 GeV milestone faces the obstacle of the long focal length required for optimal acceleration with high-power lasers,which reaches hundreds of meters for 10-100 PW *** long focal length originates from optimal laser intensity required to avoid nonlinear effects and hence large spot size and Rayleigh *** propose a"telescope"geometry in which a micro-plasma parabola(MPP)is coupled with a short-focal-length off-axis parabola,minimizing the focal length to the meter range for LWfA under optimized conditions driven by lasers beyond 1 ***-dimensional kinetic simulations demonstrate the generation of a 9 GeV electron bunch within only 1 m optical length—only one-tenth of that required with the conventional approach with the same *** proposed MPP provides a basis for the construction of compact LWfAs toward single-stage 100 GeV acceleration with 100 PW class lasers.

关键词： laser acceleration high

Bright betatron radiation from direct-laseraccelerated electrons at moderate relativistic laser intensity

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Matter and Radiation at Extremes 2021年第4期6卷 10-17页

作者： O.N.Rosmej x.f.s.en.a.pukhov L.Antonelli f.Barbato M.Gyrdymov M.M.Gunther s.Zahter V.s.Popov N.G.Borisenko N.E.Andreev GsI Helmholtzzentrum fur schwerionenforschung GmbH Planckstraße164291 DarmstadtGermany Goethe University FrankfurtMax-von-Laue-Straße 160438 Frankfurt am MainGermany Helmholtz forschungsakademie Hessen fur fAIR(HfHf) Campus Frankfurt am MainMax-von-Laue-Straße 1260438 Frankfurt am MainGermany Heinrich-Heine-University Dusseldorf Universitatsstraße 1DusseldorfGermany York Plasma Institute University of YorkChurch LaneHeslingtonYork YO105DQUnited Kingdom University of Bordeaux CNRSCEACELIAUMR 5107F-33405 TalenceFrance Joint Institute for High Temperatures RASIzhorskaya St.13Bldg.2125412 MoscowRussia Moscow Institute of Physics and Technology(state University) Institutskiy Pereulok 9141700 DolgoprudnyMoscow RegionRussia P.N.Lebedev Physical Institute RASLeninsky Prospekt 53119991 MoscowRussia

Direct laser acceleration(DLA)of electrons in a plasma of near-critical electron density(NCD)and the associated synchrotron-like radiation are discussed for moderate relativistic laser intensity(normalized laser amplitude a0≤4.3)and ps length *** regime is typical of kJ PW-class laser facilities designed for high-energy-density(HED)*** experiments at the PHELIx facility,it has been demonstrated that interaction of a 1019 W/cm2 sub-ps laser pulse with a sub-mm length NCD plasma results in the generation of high-current well-directed superponderomotive electrons with an effective temperature ten times higher than the ponderomotive potential[Rosmej et al.,Plasma *** fusion 62,115024(2020)].Three-dimensional particle-in-cell simulations provide good agreement with the measured electron energy distribution and are used in the current work to study synchrotron radiation from the DLA-accelerated *** resulting x-ray spectrum with a critical energy of 5 keV reveals an ultrahigh photon number of 731011 in the 1–30 keV photon energy range at the focused laser energy of 20 *** simulations of betatron x-ray phase contrast imaging based on the DLA process for the parameters of a PHELIx laser are *** results are of interest for applications in HED experiments,which require a ps x-ray pulse and a high photon flux.

关键词： intensity relativistic critical

Laser peeler regime of high-harmonic generation for diagnostics of high-power focused laser pulses

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Matter and Radiation at Extremes 2023年第3期8卷 10-17页

作者： s.E.Perevalov A.M.pukhov M.V.starodubtsev A.A.soloviev Institute of Applied Physics of the Russian Academy of sciences 46 Ulyanov st.Nizhny Novgorod 603950Russia Institut für Theoretische Physik I HeinrichHeine-Universität Düsseldorf Universitätsstraße 140225 DüsseldorfGermany

A method for measuring the intensity of focused high-power laser pulses based on numerical simulation of high-harmonic generation in the laser peeler regime is *** dependence of the efficiency of high-harmonic generation on the laser pulse intensity and the spatial parameters during interaction with solid targets is studied *** simulation clearly shows that the amplitude of the generated harmonics depends on the laser pulse *** proposed method is simpler than similar intensity measurement techniques and does not require complex preparation.

关键词： laser power harmonic

Characterization of bright betatron radiation generated by direct laser acceleration of electrons in plasma of near critical density

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Matter and Radiation at Extremes 2024年第2期9卷 26-35页

作者： J.Cikhardt M.Gyrdymov s.Zähter P.Tavana M.M.Günther N.Bukharskii N.Borisenko J.Jacoby x.f.s.en.a.pukhov N.E.Andreev O.N.Rosmej faculty of Electrical engineering Czech Technical University in Prague16627 Prague 6Czech Republic Goethe University FrankfurtMax-von-Laue-Straße 160438 Frankfurt am MainGermany GsI Helmholtzzentrum für schwerionenforschung GmbH Planckstraße 164291 DarmstadtGermany focused energy GmbH Im Tiefen See 4564293 DarmstadtGermany National Research Nuclear University MEPhI Kashirskoe shosse 31115409 MoscowRussian Federation Lebedev Physical Institute RAs Leninskiy Prospekt 53119991 MoscowRussian Federation Heinrich-Heine-University Düsseldorf Universitätsstrasse 1DüsseldorfGermany Joint Institute for High Temperatures RASIzhorskaya st.13Bldg.2125412 MoscowRussian Federation Moscow Institute of Physics and Technology Institutskiy Pereulok 9141700 DolgoprudnyRussia

Directed x-rays produced in the interaction of sub-picosecond laser pulses of moderate relativistic intensity with plasma of near-critical density are investigated. synchrotron-like (betatron) radiation occurs in the process of direct laser acceleration (DLA) of electrons in a relativisticlaser channel when the electrons undergo transverse betatron oscillations in self-generated quasi-static electric and magnetic fields. In anexperiment at the PHELIx laser system, high-current directed beams of DLA electrons with a mean energy ten times higher than the ponderomotive potential and maximum energy up to 100 MeV were measured at 10^(19) W/cm^(2)laser intensity. The spectrum of directed x-raysin the range of 5–60 keV was evaluated using two sets of Ross filters placed at 0°and 10°to the laser pulse propagation axis. The differential x-ray absorption method allowed for absolute measurements of the angular-dependent photon fluence. We report 10^(13) photons/sr withenergies >5 keV measured at 0°to the laser axis and a brilliance of 10^(21) photons s^(−1) mm^(−2) mrad−2(0.1%BW)−1. The angular distributionof the emission has an fWHM of 14°–16°. Thanks to the ultra-high photon fluence, point-like radiation source, and ultra-short emissiontime, DLA-based keV backlighters are promising for various applications in high-energy-density research with kilojoule petawatt-class laserfacilities.

关键词： laser acceleration critical

Betatron-like resonance in ultra-intense laser mass-limited foil interaction

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Betatron-like resonance in ultra-intense laser mass-limited ...

Nonlinear branched flow of intense laser light in randomly uneven media

第七届全国青年计算物理学术会议

作者： T P Yu Z M sheng A pukhov Y Yin H B Zhuo Y Y Ma x H xu f Q shao C T Zhou College of science National University of Defense Technology state Key Laboratory of High Performance Computing National University of Defense Technology Key Laboratory for Laser Plasmas (MoE) and Department of Physics Shanghai Jiao Tong University Institut fr Theoretische Physik I Heinrich-Heine-Universitt Düsseldorf Institute of Applied Physics and Computational Mathematics

With the help of three-dimensional particle-in-cell simulations, we study the electron dynamics in radiation pressure acceleration of a mass-limited foil target. When a mass-limited foil is irradiated by a circularly polarized laser pulse, the wing parts of the laser overtake the foil from the foil boundaries. In the laser propagation direction, electrons are significantly accelerated by the laser radiation pressure. In the laser polarization direction, electrons are subjected to a strong radial space-charge force and oscillate in the overtaking laser *** their combined actions, electrons execute a betatron-like oscillation and a spatially helix electron bunch is thus formed. A simple analytical model is proposed for interpreting the high electron energies and large oscillating amplitudes. It is shown that, when the electron oscillation frequency coincides with the laser frequency as witnessed by the electron,betatron-like resonance occurs, resulting in hundreds of MeV electron generation.

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Matter and Radiation at Extremes 2023年第2期8卷 25-32页

作者： K.Jiang T.W.Huang C.N.Wu M.Y.Yu H.Zhang s.Z.Wu H.B.Zhuo A.pukhov C.T.Zhou s.C.Ruan College of Applied sciences Shenzhen UniversityShenzhen 518060People’s Republic of China shenzhen Key Laboratory of Ultraintense Laser and Advanced Material Technology Center for Advanced Material Diagnostic Technologyand College of Engineering PhysicsShenzhen Technology UniversityShenzhen 518118People’s Republic of China Institut für Theoretische Physik I Heinrich-Heine-Universität Düsseldorf40225 DüsseldorfGermany

Branched flow is an interesting phenomenon that can occur in diverse *** is usually linear in the sense that the flow does not alter the properties of the *** flow of light on thin films has recently been *** is therefore of interest to know whether nonlinear light branching can also ***,using particle-in-cell simulations,we find that in the case of an intense laser propagating through a randomly uneven medium,cascading local photoionization by the incident laser,together with the response of freed electrons in the strong laser fields,triggers space–time-dependent optical *** resulting branching pattern depends dramatically on the laser *** is,the branching here is distinct from the existing linear *** observed branching properties agree well with theoretical analyses based on the Helmholtz *** branched propagation of intense lasers potentially opens up a new area for laser–matter interaction and may be relevant to other branching phenomena of a nonlinear nature.

关键词： laser intense flow

Bright Betatronlike x Rays from Radiation Pressure Acceleration of a Mass-Limited foil Target

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Bright Betatronlike X Rays from Radiation Pressure Accelerat...

Polarized proton beams from laser-induced plasmas

第七届全国青年计算物理学术会议

作者：余同普 Alexander pukhov 盛政明刘峰 Gennady shvets Department of Physics National University of Defense Technology state Key Laboratory of High Performance Computing National University of Defense Technology Institut für Theoretische Physik I Heinrich-Heine-Universitt Düsseldorf Institut für Theoretische Physik I Heinrich-Heine-Universitt Düsseldorf Key Laboratory for Laser Plasmas(MoE) and Department of Physics Shanghai Jiao Tong University Institut für Laser-und Plasmaphysik Heinrich-Heine-Universitt Düsseldorf Department of Physics The University of Texas at Austin

By using multidimensional particle-in-cell simulations, we study the electromagnetic emission from radiation pressure acceleration of ultrathin mass-limited foils. When a circularly polarized laser pulse irradiates the foil, the laser radiation pressure pushes the foil forward as a whole. The outer wings of the pulse continue to propagate and act as a natural undulator. Electrons move together with ions longitudinally but oscillate around the latter transversely, forming a self-organized helical electron bunch. When the electron oscillation frequency coincides with the laser frequency as witnessed by the electron,betatronlike resonance occurs. The emitted x rays by the resonant electrons have high brightness, short durations, and broad band ranges which may have diverse applications.

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High Power Laser science and engineering 2019年第1期7卷 114-119页

作者： Anna Hützen Johannes Thomas Jürgen B?ker Ralf engels Ralf Gebel Andreas Lehrach Alexander pukhov T.Peter Rakitzis Dimitris sofikitis Markus Büscher Peter Grünberg Institut (PGI-6) Forschungszentrum Jülich Institut für Laser-und Plasmaphysik Heinrich-Heine-Universit?t Düsseldorf Institut für Theoretische Physik I Heinrich-Heine-Universit?t Düsseldorf Institut für Kernphysik (IKP-4) Forschungszentrum Jülich Institut für Kernphysik (IKP-2) Forschungszentrum Jülich JARA-fAME und III.Physikalisches Institut B RWTH Aachen Department of Physics University of Crete Institute of Electronic structure and Laser Foundation for Research and Technology-Hellas

We report on the concept of an innovative source to produce polarized proton/deuteron beams of a kinetic energy up to several GeV from a laser-driven plasma accelerator. spin effects have been implemented into the particle-in-cell(PIC) simulation code VLPL(Virtual Laser Plasma Lab) to make theoretical predictions about the behavior of proton spins in laser-induced plasmas. simulations of spin-polarized targets show that the polarization is conserved during the acceleration process. for the experimental realization, a polarized HCl gas-jet target is under construction using the fundamental wavelength of a Nd:YAG laser system to align the HCl bonds and simultaneously circularly polarized light of the fifth harmonic to photo-dissociate, yielding nuclear polarized H atoms. subsequently, their degree of polarization is measured with a Lamb-shift polarimeter. The final experiments, aiming at the first observation of a polarized particle beam from laser-generated plasmas, will be carried out at the 10 PW laser system sULf at sIOM, shanghai.

关键词： laser-driven plasma accelerator particle-in-cell simulations polarized gas-jet target polarized proton beams