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Tan F, Wang SY, Zhang YX, Zhang ZM, Zhu B, Wu YC, Yu MH, Yang Y, Li G, Zhang TK, Yan YH, Lu F, Fan W, Zhou WM, Gu YQ, Qiao B. Mechanism studies for relativistic attosecond electron bunches from laser-illuminated nanotargets. Phys Rev E 2024; 109:045205. [PMID: 38755824 DOI: 10.1103/physreve.109.045205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Accepted: 12/05/2023] [Indexed: 05/18/2024]
Abstract
To find a way to control the electron-bunching process and the bunch-emitting directions when an ultraintense, linearly polarized laser pulse interacts with a nanoscale target, we explored the mechanisms for the periodical generation of relativistic attosecond electron bunches. By comparing the simulation results of three different target geometries, the results show that for nanofoil target, limiting the transverse target size to a small value and increasing the longitudinal size to a certain extent is an effective way to improve the total electron quantity in a single bunch. Then the subfemtosecond electronic dynamics when an ultrashort ultraintense laser grazing propagates along a nanofoil target was analyzed through particle-in-cell simulations and semiclassical analyses, which shows the detailed dynamics of the electron acceleration, radiation, and bunching process in the laser field. The analyses also show that the charge separation field produced by the ions plays a key role in the generation of electron bunches, which can be used to control the quantity of the corresponding attosecond radiation bunches by adjusting the length of the nanofoil target.
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Affiliation(s)
- F Tan
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - S Y Wang
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - Y X Zhang
- Department of Experimental Physics, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - Z M Zhang
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - B Zhu
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - Y C Wu
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - M H Yu
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - Y Yang
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - G Li
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - T K Zhang
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - Y H Yan
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - F Lu
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - W Fan
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - W M Zhou
- Science and Technology on Plasma Physics Laboratory, Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
| | - Y Q Gu
- National Key Laboratory of Plasma Physics, Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China
| | - B Qiao
- Center for Applied physics and Techology, Peking University, Beijing 100871, China
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Xue K, Sun T, Wei KJ, Li ZP, Zhao Q, Wan F, Lv C, Zhao YT, Xu ZF, Li JX. Generation of High-Density High-Polarization Positrons via Single-Shot Strong Laser-Foil Interaction. PHYSICAL REVIEW LETTERS 2023; 131:175101. [PMID: 37955489 DOI: 10.1103/physrevlett.131.175101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 09/19/2023] [Indexed: 11/14/2023]
Abstract
We put forward a novel method for producing ultrarelativistic high-density high-polarization positrons through a single-shot interaction of a strong laser with a tilted solid foil. In our method, the driving laser ionizes the target, and the emitted electrons are accelerated and subsequently generate abundant γ photons via the nonlinear Compton scattering, dominated by the laser. These γ photons then generate polarized positrons via the nonlinear Breit-Wheeler process, dominated by a strong self-generated quasistatic magnetic field B^{S}. We find that placing the foil at an appropriate angle can result in a directional orientation of B^{S}, thereby polarizing positrons. Manipulating the laser polarization direction can control the angle between the γ photon polarization and B^{S}, significantly enhancing the positron polarization degree. Our spin-resolved quantum electrodynamics particle-in-cell simulations demonstrate that employing a laser with a peak intensity of about 10^{23} W/cm^{2} can obtain dense (≳10^{18} cm^{-3}) polarized positrons with an average polarization degree of about 70% and a yield of above 0.1 nC per shot. Moreover, our method is feasible using currently available or upcoming laser facilities and robust with respect to the laser and target parameters. Such high-density high-polarization positrons hold great significance in laboratory astrophysics, high-energy physics, and new physics beyond the standard model.
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Affiliation(s)
- Kun Xue
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Ting Sun
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Ke-Jia Wei
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhong-Peng Li
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Qian Zhao
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Feng Wan
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Chong Lv
- Department of Nuclear Physics, China Institute of Atomic Energy, P.O. Box 275(7), Beijing 102413, China
| | - Yong-Tao Zhao
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Zhong-Feng Xu
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
| | - Jian-Xing Li
- Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter (MOE), Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic Devices, School of Physics, Xi'an Jiaotong University, Xi'an 710049, China
- Department of Nuclear Physics, China Institute of Atomic Energy, P.O. Box 275(7), Beijing 102413, China
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3
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Terahertz Emission Enhanced by a Laser Irradiating on a T-Type Target. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12094464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The generation of high field terahertz emission based on the interaction between an ultra-intense laser and solid targets has been widely studied in recent years because of its wide potential applications in biological imaging and material science. Here, a novel scheme is proposed to enhance the terahertz emission, in which a linearly polarized laser pulse irradiates a T-type target including a longitudinal target followed by a transverse target. By using two-dimensional particle-in-cell simulations, we find that the electron beam, modulated by the direct laser acceleration via the interaction of the laser with the longitudinal solid target, plays a crucial role in enhancing the intensity of terahertz emission and controlling its spatial distribution. Compared with the single-layer target, the maximum radiated electromagnetic field’s intensity passing through the spatial probe point is enhanced by about one order of magnitude, corresponding to the terahertz emission power increasing by two orders of magnitude or so. In addition, the proposed scheme is robust with respect to the thickness and length of the target. Such a scheme may provide important theoretical and data support for the enhancement of terahertz emission efficiency based on the ultra-intense laser irradiation of solid targets.
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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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Yue S, Fu S, Li J, Zhang X, Feng Y, Hu B, Du H. A redshift mechanism of high-order harmonics: Change of ionization energy. J Chem Phys 2018; 148:234304. [PMID: 29935501 DOI: 10.1063/1.5031210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We theoretically study the high-order harmonic generation of H2+ and its isotopes beyond the Born-Oppenheimer dynamics. It is surprising that the spectral redshift can still be observed in high harmonic spectra of H2+ driven by a sinusoidal laser pulse in which the trailing (leading) edge of the laser pulse is nonexistent. The results confirm that this spectral redshift originates from the reduction in ionization energy between recombination time and ionization time, which is obviously different from the nonadiabatic spectral redshift induced by the falling edge of the laser pulse. Additionally, the improved instantaneous frequency of harmonics by considering the changeable ionization energy can deeply verify our results. Therefore, this new mechanism must be taken into account when one uses the nonadiabatic spectral redshift to retrieve the nuclear motion.
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Affiliation(s)
- Shengjun Yue
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Silin Fu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Jinbin Li
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Xiao Zhang
- Center for Interdisciplinary Studies and Key Laboratory for Magnetism and Magnetic Materials of the MoE, Lanzhou University, Lanzhou 730000, China
| | - Yongkang Feng
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Bitao Hu
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
| | - Hongchuan Du
- School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
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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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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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