1
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Theoretical Study of the Efficient Ion Acceleration Driven by Petawatt-Class Lasers via Stable Radiation Pressure Acceleration. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12062924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Laser-driven radiation pressure acceleration (RPA) is one of the most promising candidates to achieve quasi-monoenergetic ion beams. In particular, many petawatt systems are under construction or in the planning phase. Here, a stable radiation pressure acceleration (SRPA) scheme is investigated, in which a circularly-polarized (CP) laser pulse illuminates a CH2 thin foil followed by a large-scale near-critical-density (NCD) plasma. In the laser-foil interaction, a longitudinal charge-separated electric field is excited to accelerate ions together with the heating of electrons. The heating can be alleviated by the continuous replenishment of cold electrons of the NCD plasma as the laser pulse and the pre-accelerated ions enter into the NCD plasma. With the relativistically transparent propagation of the pulse in the NCD plasma, the accelerating field with large amplitude is persistent, and its propagating speed becomes relatively low, which further accelerates the pre-accelerated ions. Our particle-in-cell (PIC) simulation shows that the SRPA scheme works efficiently with the laser intensity ranging from 6.85×1021 W cm−2 to 4.38×1023 W cm−2, e.g., a well-collimated quasi-monoenergetic proton beam with peak energy ∼1.2 GeV can be generated by a 2.74 × 1022 W cm−2 pulse, and the energy conversion efficiency from the laser pulse to the proton beam is about 16%. The QED effects have slight influence on this SRPA scheme.
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2
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Lu Y, Zhang GB, Zhao J, Hu YT, Zhang H, Li DA, Li QN, Cao Y, Wu YB, Yin Y, Shao FQ, Yu TP. Ultra-brilliant GeV betatronlike radiation from energetic electrons oscillating in frequency-downshifted laser pulses. OPTICS EXPRESS 2021; 29:8926-8940. [PMID: 33820333 DOI: 10.1364/oe.419761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 02/28/2021] [Indexed: 06/12/2023]
Abstract
Electrons can be accelerated to GeV energies with high collimation via laser wakefield acceleration in the bubble regime and emit bright betatron radiation in a table-top size. However, the radiation brightness is usually limited to the third-generation synchrotron radiation facilities operating at similar photon energies. Using a two-stage plasma configuration, we propose a novel scheme for generating betatronlike radiation with an extremely high brilliance. In this scheme, the relativistic electrons inside the bubble injected from the first stage can catch up with the frequency-downshifted laser pulse formed in the second stage. The laser red shift originates from the phase modulation, together with the group velocity dispersion, which enables more energy to be transfered from the laser pulse to γ-photons, giving rise to ultra-brilliant betatronlike radiation. Multi-dimensional particle-in-cell simulations indicate that the radiated γ-photons have the cut-off energy of GeV and a peak brilliance of 1026 photons s-1 mm-2 mrad-2 per 0.1%BW at 1 MeV, which may have diverse applications in various fields.
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3
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Zheng X, Weng S, Zhang Z, Ma H, Chen M, McKenna P, Sheng Z. Simultaneous polarization transformation and amplification of multi-petawatt laser pulses in magnetized plasmas. OPTICS EXPRESS 2019; 27:19319-19330. [PMID: 31503693 DOI: 10.1364/oe.27.019319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2019] [Accepted: 06/13/2019] [Indexed: 06/10/2023]
Abstract
With increasing laser peak power, the generation and manipulation of high-power laser pulses become a growing challenge for conventional solid-state optics due to their limited damage threshold. As a result, plasma-based optical components that can sustain extremely high fields are attracting increasing interest. Here, we propose a type of plasma waveplate based on magneto-optical birefringence under a transverse magnetic field, which can work under extremely high laser power. Importantly, this waveplate can simultaneously alter the polarization state and boost the peak laser power. It is demonstrated numerically that an initially linearly polarized laser pulse with 5 petawatt peak power can be converted into a circularly polarized pulse with a peak power higher than 10 petawatts by such a waveplate with a centimeter-scale diameter. The energy conversion efficiency of the polarization transformation is about 98%. The necessary waveplate thickness is shown to scale inversely with plasma electron density ne and the square of magnetic field B0, and it is about 1 cm for ne = 3 × 1020 cm-3 and B0 = 100 T. The proposed plasma waveplate and other plasma-based optical components can play a critical role for the effective utilization of multi-petawatt laser systems.
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4
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Lécz Z, Andreev A. Attosecond bunches of gamma photons and positrons generated in nanostructure targets. Phys Rev E 2019; 99:013202. [PMID: 30780376 DOI: 10.1103/physreve.99.013202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Indexed: 11/07/2022]
Abstract
The subatomic experimental exploration of physical processes on extremely short time scales has become possible by the generation of high-quality electron bunches and x-ray pulses with subfemtosecond durations. Increasing the photon energy from the x-ray to gamma-ray regime makes probing of extremely small space-time domains accessible. Here, a mechanism for generating attosecond gamma photon and positron bunches with small divergence using laser intensities below 10^{23}W/cm^{2} is proposed. In contrast with previous works, in our scheme a single laser pulse is sufficient instead of two counterpropagating pulses. Numerical simulations are used to formulate the conditions for confined radiation and to characterize the generated photon and positron bunches.
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Affiliation(s)
- Zs Lécz
- ELI-ALPS, ELI-HU NKft., Dugonics Square 13, 6720 Szeged, Hungary
| | - A Andreev
- Max-Born Institute, Max-Born-Str. 2A, 12489 Berlin, Germany and ELI-ALPS, ELI-HU NKft., Dugonics Square 13, 6720 Szeged, Hungary
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5
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Yu JQ, Lu HY, Takahashi T, Hu RH, Gong Z, Ma WJ, Huang YS, Chen CE, Yan XQ. Creation of Electron-Positron Pairs in Photon-Photon Collisions Driven by 10-PW Laser Pulses. PHYSICAL REVIEW LETTERS 2019; 122:014802. [PMID: 31012720 DOI: 10.1103/physrevlett.122.014802] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Indexed: 06/09/2023]
Abstract
A novel approach is proposed to demonstrate the two-photon Breit-Wheeler process by using collimated and wide-bandwidth γ-ray pulses driven by 10-PW lasers. Theoretical calculations suggest that more than 3.2×10^{8} electron-positron pairs with a divergence angle of 7° can be created per shot, and the signal-to-noise ratio is higher than 10^{3}. The positron signal, which is roughly 100 times higher than the detection limit, can be measured by using the existing spectrometers. This approach, which could demonstrate the e^{-}e^{+} pair creation process from two photons, would provide important tests for two-photon physics and other fundamental physical theories.
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Affiliation(s)
- J Q Yu
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
| | - H Y Lu
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - T Takahashi
- AdSM Hiroshima University, 1-3-1 Kagamiyama, Higashi Hiroshima, Hiroshima 739-8530, Japan
| | - R H Hu
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
| | - Z Gong
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
| | - W J Ma
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
| | - Y S Huang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
- State Key Laboratory of Particle Detection and Electronics (Institute of High Energy Physics, CAS), Beijing 100049, China
| | - C E Chen
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
| | - X Q Yan
- State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, Peking University, Beijing 100871, China
- Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
- Shenzhen Research Institute of Peking University, Shenzhen 518055, China
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6
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Vieira J, Mendonça JT, Quéré F. Optical Control of the Topology of Laser-Plasma Accelerators. PHYSICAL REVIEW LETTERS 2018; 121:054801. [PMID: 30118274 DOI: 10.1103/physrevlett.121.054801] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Indexed: 06/08/2023]
Abstract
We propose a twisted plasma accelerator capable of generating relativistic electron vortex beams with helical current profiles. The angular momentum of these vortex bunches is quantized, dominates their transverse motion, and results in spiraling particle trajectories around the twisted wakefield. We focus on a laser wakefield acceleration scenario, driven by a laser beam with a helical spatiotemporal intensity profile, also known as a light spring. We find that these light springs can rotate as they excite the twisted plasma wakefield, providing a new mechanism to control the twisted wakefield phase velocity and enhance energy gain and trapping efficiency beyond planar wakefields.
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Affiliation(s)
- J Vieira
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - J T Mendonça
- GoLP/Instituto de Plasmas e Fusão Nuclear, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
| | - F Quéré
- LIDYL, CEA, CNRS, Université Paris-Saclay, CEA Saclay, 91 191 Gif-sur-Yvette, France
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7
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Attosecond electron bunches from a nanofiber driven by Laguerre-Gaussian laser pulses. Sci Rep 2018; 8:7282. [PMID: 29740016 PMCID: PMC5940694 DOI: 10.1038/s41598-018-25421-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 04/16/2018] [Indexed: 11/08/2022] Open
Abstract
Generation of attosecond bunches of energetic electrons offers significant potential from ultrafast physics to novel radiation sources. However, it is still a great challenge to stably produce such electron beams with lasers, since the typical subfemtosecond electron bunches from laser-plasma interactions either carry low beam charge, or propagate for only several tens of femtoseconds. Here we propose an all-optical scheme for generating dense attosecond electron bunches via the interaction of an intense Laguerre-Gaussian (LG) laser pulse with a nanofiber. The dense bunch train results from the unique field structure of a circularly polarized LG laser pulse, enabling each bunch to be phase-locked and accelerated forward with low divergence, high beam charge and large beam-angular-momentum. This paves the way for wide applications in various fields, e.g., ultrabrilliant attosecond x/γ-ray emission.
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8
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Ostermayr TM, Gebhard J, Haffa D, Kiefer D, Kreuzer C, Allinger K, Bömer C, Braenzel J, Schnürer M, Cermak I, Schreiber J, Hilz P. A transportable Paul-trap for levitation and accurate positioning of micron-scale particles in vacuum for laser-plasma experiments. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2018; 89:013302. [PMID: 29390683 DOI: 10.1063/1.4995955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report on a Paul-trap system with large access angles that allows positioning of fully isolated micrometer-scale particles with micrometer precision as targets in high-intensity laser-plasma interactions. This paper summarizes theoretical and experimental concepts of the apparatus as well as supporting measurements that were performed for the trapping process of single particles.
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Affiliation(s)
- T M Ostermayr
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
| | - J Gebhard
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
| | - D Haffa
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
| | - D Kiefer
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
| | - C Kreuzer
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
| | - K Allinger
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
| | - C Bömer
- European XFEL, 22869 Schenefeld, Germany
| | - J Braenzel
- Max-Born-Institut, 12489 Berlin, Germany
| | - M Schnürer
- Max-Born-Institut, 12489 Berlin, Germany
| | - I Cermak
- CGC Instruments, Hübschmannstr. 18, 09112 Chemnitz, Germany
| | - J Schreiber
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
| | - P Hilz
- Ludwig-Maximilians-Universität München, Fakultät für Physik, 85748 Garching, Germany
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9
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Li HZ, Yu TP, Liu JJ, Yin Y, Zhu XL, Capdessus R, Pegoraro F, Sheng ZM, McKenna P, Shao FQ. Ultra-bright γ-ray emission and dense positron production from two laser-driven colliding foils. Sci Rep 2017; 7:17312. [PMID: 29229952 PMCID: PMC5725605 DOI: 10.1038/s41598-017-17605-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Accepted: 11/28/2017] [Indexed: 11/17/2022] Open
Abstract
Matter can be transferred into energy and the opposite transformation is also possible by use of high-power lasers. A laser pulse in plasma can convert its energy into γ-rays and then e−e+ pairs via the multi-photon Breit-Wheeler process. Production of dense positrons at GeV energies is very challenging since extremely high laser intensity ~1024 Wcm−2 is required. Here we propose an all-optical scheme for ultra-bright γ-ray emission and dense positron production with lasers at intensity of 1022–23 Wcm−2. By irradiating two colliding elliptically-polarized lasers onto two diamondlike carbon foils, electrons in the focal region of one foil are rapidly accelerated by the laser radiation pressure and interact with the other intense laser pulse which penetrates through the second foil due to relativistically induced foil transparency. This symmetric configuration enables efficient Compton back-scattering and results in ultra-bright γ-photon emission with brightness of ~1025 photons/s/mm2/mrad2/0.1%BW at 15 MeV and intensity of 5 × 1023 Wcm−2. Our first three-dimensional simulation with quantum-electrodynamics incorporated shows that a GeV positron beam with density of 2.5 × 1022 cm−3 and flux of 1.6 × 1010/shot is achieved. Collective effects of the pair plasma may be also triggered, offering a window on investigating laboratory astrophysics at PW laser facilities.
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Affiliation(s)
- Han-Zhen Li
- College of Science, National University of Defense Technology, Changsha, 410073, China
| | - Tong-Pu Yu
- College of Science, National University of Defense Technology, Changsha, 410073, China. .,SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK.
| | - Jin-Jin Liu
- College of Science, National University of Defense Technology, Changsha, 410073, China
| | - Yan Yin
- College of Science, National University of Defense Technology, Changsha, 410073, China.,Institute of Applied Physics and Computational Mathematics, Beijing, 100094, China
| | - Xing-Long Zhu
- College of Science, National University of Defense Technology, Changsha, 410073, China.,Collaborative Innovation Center of IFSA (CICIFSA), Key Laboratory for Laser Plasmas (MoE) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Remi Capdessus
- SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK
| | - Francesco Pegoraro
- Department of Physics Enrico Fermi, University of Pisa, and CNR/INO, Pisa, 56122, Italy
| | - Zheng-Ming Sheng
- SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK.,Collaborative Innovation Center of IFSA (CICIFSA), Key Laboratory for Laser Plasmas (MoE) and School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China.,Tsung-Dao Lee Institute, Shanghai, 200240, China.,Cockcroft Institute, Sci-Tech Daresbury, Cheshire, WA4 4AD, UK
| | - Paul McKenna
- SUPA, Department of Physics, University of Strathclyde, Glasgow, G4 0NG, UK.,Cockcroft Institute, Sci-Tech Daresbury, Cheshire, WA4 4AD, UK
| | - Fu-Qiu Shao
- College of Science, National University of Defense Technology, Changsha, 410073, China
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10
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Dense GeV electron-positron pairs generated by lasers in near-critical-density plasmas. Nat Commun 2016; 7:13686. [PMID: 27966530 PMCID: PMC5171869 DOI: 10.1038/ncomms13686] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 10/25/2016] [Indexed: 11/28/2022] Open
Abstract
Pair production can be triggered by high-intensity lasers via the Breit–Wheeler process. However, the straightforward laser–laser colliding for copious numbers of pair creation requires light intensities several orders of magnitude higher than possible with the ongoing laser facilities. Despite the numerous proposed approaches, creating high-energy-density pair plasmas in laboratories is still challenging. Here we present an all-optical scheme for overdense pair production by two counter-propagating lasers irradiating near-critical-density plasmas at only ∼1022 W cm−2. In this scheme, bright γ-rays are generated by radiation-trapped electrons oscillating in the laser fields. The dense γ-photons then collide with the focused counter-propagating lasers to initiate the multi-photon Breit–Wheeler process. Particle-in-cell simulations indicate that one may generate a high-yield (1.05 × 1011) overdense (4 × 1022 cm−3) GeV positron beam using 10 PW scale lasers. Such a bright pair source has many practical applications and could be basis for future compact high-luminosity electron–positron colliders.
High power lasers can produce electron-positron pairs at GeV energies, but doing so through laser–laser collisions would require exceedingly high intensities. Here the authors present an all-optical scheme for pair production by irradiating near-critical-density plasmas with two counter-propagating lasers.
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11
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Liu JJ, Yu TP, Yin Y, Zhu XL, Shao FQ. All-optical bright γ-ray and dense positron source by laser driven plasmas-filled cone. OPTICS EXPRESS 2016; 24:15978-15986. [PMID: 27410866 DOI: 10.1364/oe.24.015978] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An all-optical scheme for bright γ-rays and dense e-e+ pair source is proposed by irradiating a 1022 W/cm2 laser onto a near-critical-density plasmas filled Al cone. Two-dimensional (2D) QED particle-in-cell (PIC) simulations show that, a dense electron bunch is confined in the laser field due to the radiation reaction and the trapped electrons oscillate transversely, emitting bright γ-rays forward in two ways: (1) nonlinear Compton scattering due to oscillation of electrons in the laser field, and (2) Compton backwardscattering resulting from the bunch colliding with the reflected laser by the cone tip. Finally, the multi-photon Breit-Wheeler process is initiated, producing abundant e-e+ pairs with a density of ∼ 1027m-3. The scheme is further demonstrated by full 3D PIC simulations, which indicates a positron number up to 2 × 109. This compact γ-rays and e-e+ pair source may have many potential applications, such as the laboratory study of astrophysics and nuclear physics.
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12
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Yi L, Pukhov A, Luu-Thanh P, Shen B. Bright X-Ray Source from a Laser-Driven Microplasma Waveguide. PHYSICAL REVIEW LETTERS 2016; 116:115001. [PMID: 27035304 DOI: 10.1103/physrevlett.116.115001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Indexed: 06/05/2023]
Abstract
Owing to the rapid progress in laser technology, very high-contrast femtosecond laser pulses of relativistic intensities have become available. These pulses allow for interaction with microstructured solid-density plasma without destroying the structure by parasitic prepulses. This opens a new realm of possibilities for laser interaction with micro- and nanoscale photonic materials at relativistic intensities. Here we demonstrate, for the first time, that when coupled with a readily available 1.8 J laser, a microplasma waveguide (MPW) may serve as a novel compact x-ray source. Electrons are extracted from the walls and form a dense helical bunch inside the channel. These electrons are efficiently accelerated and wiggled by the waveguide modes in the MPW, which results in a bright, well-collimated emission of hard x rays in the range of 1∼100 keV.
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Affiliation(s)
- Longqing Yi
- Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, Düsseldorf 40225, Germany
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China
| | - Alexander Pukhov
- Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, Düsseldorf 40225, Germany
| | - Phuc Luu-Thanh
- Institut für Theoretische Physik I, Heinrich-Heine-Universität Düsseldorf, Düsseldorf 40225, Germany
| | - Baifei Shen
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, P.O. Box 800-211, Shanghai 201800, China
- Collaborative Innovation Center of IFSA (CICIFSA), Shanghai Jiao Tong University, Shanghai 200240, China
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13
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Luo W, Yu TP, Chen M, Song YM, Zhu ZC, Ma YY, Zhuo HB. Generation of bright attosecond x-ray pulse trains via Thomson scattering from laser-plasma accelerators. OPTICS EXPRESS 2014; 22:32098-32106. [PMID: 25607175 DOI: 10.1364/oe.22.032098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Generation of attosecond x-ray pulse attracts more and more attention within the advanced light source user community due to its potentially wide applications. Here we propose an all-optical scheme to generate bright, attosecond hard x-ray pulse trains by Thomson backscattering of similarly structured electron beams produced in a vacuum channel by a tightly focused laser pulse. Design parameters for a proof-of-concept experiment are presented and demonstrated by using a particle-in-cell code and a four-dimensional laser-Compton scattering simulation code to model both the laser-based electron acceleration and Thomson scattering processes. Trains of 200 attosecond duration hard x-ray pulses holding stable longitudinal spacing with photon energies approaching 50 keV and maximum achievable peak brightness up to 1020 photons/s/mm2/mrad2/0.1%BW for each micro-bunch are observed. The suggested physical scheme for attosecond x-ray pulse trains generation may directly access the fastest time scales relevant to electron dynamics in atoms, molecules and materials.
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14
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Ge ZY, Zhuo HB, Yu W, Yang XH, Yu TP, Li XH, Zou DB, Ma YY, Yin Y, Shao FQ, Peng XJ. Electron density compression and oscillating effects on laser energy absorption in overdense plasma targets. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:033106. [PMID: 24730955 DOI: 10.1103/physreve.89.033106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Indexed: 06/03/2023]
Abstract
An analytical model for energy absorption during the interaction of an ultrashort, ultraintense laser with an overdense plasma is proposed. Both the compression effect of the electron density profile and the oscillation of the electron plasma surface are self-consistently included, which exhibit significant influences on the laser energy absorption. Based on our model, the general scaling law of the compression effect depending on laser strength and initial density is derived, and the temporal variation of the laser absorption due to the boundary oscillating effect is presented. It is found that due to the oscillation of the electron plasma surface, the laser absorption rate will vibrate periodically at ω or 2ω frequency for the p-polarized and s-polarized laser, respectively. The effect of plasma collision on the laser absorption has also been investigated, which shows a considerable rise in absorption with increasing electron-ion collision frequency for both polarizations.
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Affiliation(s)
- Z Y Ge
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - H B Zhuo
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - W Yu
- Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, P. R. China
| | - X H Yang
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - T P Yu
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - X H Li
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - D B Zou
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - Y Y Ma
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - Y Yin
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - F Q Shao
- College of Science, National University of Defense Technology, Changsha 410073, P. R. China
| | - X J Peng
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, P. R. China
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15
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Liu Q, Xu Y, Qi X, Zhao X, Ji L, Yu T, Wei L, Yang L, Hu B. Control of ultra-intense single attosecond pulse generation in laser-driven overdense plasmas. OPTICS EXPRESS 2013; 21:31925-31939. [PMID: 24514788 DOI: 10.1364/oe.21.031925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Ultra-intense single attosecond pulse (AP) can be obtained from circularly polarized (CP) laser interacting with overdense plasma. High harmonics are naturally generated in the reflected laser pulses due to the laser-induced one-time drastic oscillation of the plasma boundary. Using two-dimensional (2D) planar particle-in-cell (PIC) simulations and analytical model, we show that multi-dimensional effects have great influence on the generation of AP. Self-focusing and defocusing phenomena occur in front of the compressed plasma boundary, which lead to the dispersion of the generated AP in the far field. We propose to control the reflected high harmonics by employing a density-modulated foil target (DMFT). When the target density distribution fits the laser intensity profile, the intensity of the attosecond pulse generated from the center part of the plasma has a flatten profile within the center range in the transverse direction. It is shown that a single 300 attosecond (1 as = 10(-18)s) pulse with the intensity of 1.4 × 10(21) W cm(-2) can be naturally generated. Further simulations reveal that the reflected high harmonics properties are highly related to the modulated density distribution and the phase offset between laser field and the carrier envelope. The emission direction of the AP generated from the plasma boundary can be controlled in a very wide range in front of the plasma surface by combining the DMFT and a suitable driving laser.
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Yu TP, Yin Y, Zou DB, Ge ZY, Yang XH, Zhuo HB, Ma YY, Shao FQ, Pukhov A. Simultaneous generation of monoenergetic tunable protons and carbon ions from laser-driven nanofoils. OPTICS EXPRESS 2013; 21:22558-22565. [PMID: 24104145 DOI: 10.1364/oe.21.022558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Simultaneous generation of monoenergetic tunable protons and carbon ions from intense laser multi-component nanofoil interaction is demonstrated by using particle-in-cell simulations. It is shown that, the protons with the largest charge-to-mass ratio are instantly separated from other ion species and are efficiently accelerated in the "phase stable" way. The carbon ions always ride on the heavier oxygen ion front with an electron-filling gap between the protons and carbon ions. At the cost of widely spread oxygen ions, monoenergetic collimated protons and carbon ions are obtained simultaneously. By modulating the heavier ion densities in the foil, it is capable to control the final beam quality, which is well interpreted by a simple analytical model.
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