Electron bow-wave injection of electrons in laser-driven bubble acceleration

Y., Y.; Kawata, Shigeo; Yu, Tong-Pu; Gu, Yu; Sheng, Zheng-Ming; Yu, M. Y.; Zhuo, H. B.; Liu, H. J.; Yin, Yan; Takahashi, Kouhei; Xie, Xiangyu; Liu, J. X.; Tian, Chenjing; Shao, F. Q.

doi:10.1103/physreve.85.046403

Cited by 18 publications

(7 citation statements)

References 36 publications

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“…Broadband emission is observed from the first bubble of the wakefield, which is negligible compared with PDO radiation. This electromagnetic wave is superficially similar to the bow-like wake wave 33 , 34 , or the conical radiation from filamented plasma 10 , 35 . High frequency harmonics from, for example, a relativistic electron spike 36 , have not been observed in our simulations.…”

Section: Resultsmentioning

confidence: 89%

High-Energy, Short-Duration Bursts of Coherent Terahertz Radiation from an Embedded Plasma Dipole

Kwon

Kang

Song

et al. 2018

Sci Rep

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Emission of radiation from electrons undergoing plasma oscillations (POs) at the plasma frequency has attracted interest because of the existence of intriguing and non-trivial coupling mechanism between the electrostatic PO and the emitted electromagnetic wave. While broadband emission from plasma waves in inhomogeneous plasma is well known, the underlying physics of narrowband emission at the plasma frequency observed in experiments and in solar radio-bursts is obscure. Here we show that a spatially-localized plasma dipole oscillation (PDO) can be generated when electrons are trapped in a moving train of potential wells produced by the ponderomotive force of two slightly detuned laser pulses that collide in plasma and give rise to a burst of quasi-monochromatic radiation. The energy radiated in the terahertz spectral region can reach an unprecedented several millijoules, which makes it suitable for applications requiring short pulses of high-intensity, narrowband terahertz radiation.

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Section: Resultsmentioning

confidence: 89%

High-Energy, Short-Duration Bursts of Coherent Terahertz Radiation from an Embedded Plasma Dipole

Kwon

Kang

Song

et al. 2018

Sci Rep

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“…Energetic positrons with even higher fluxes can be expected if a higher charged, such as the ≥160 pC pulse from the electron bow-wave injection Scheme (Ma et al, 2012), electron bunch is used to generate the GRP. The GRP is generated by Compton scattering of laser light off an USUI LWFA driven electron beam.…”

Section: Discussionmentioning

confidence: 99%

Ultrashort-pulse MeV positron beam generation from intense Compton-scattering γ-ray source driven by laser wakefield acceleration

Luo

Zhuo

et al. 2012

Laser Part. Beams

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Intense Compton-scattering γ-ray radiation driven by laser wakefield acceleration (LWFA) and generation of ultrashort positron beams are investigated by Monte Carlo simulation. Using an LWFA driven GeV electron bunch and a 45 femtosecond, 90 mJ/pulse, and 10 Hz Ti:Sapphire laser for driving the Compton scattering, fs γ-ray pulses were generated. The latter have a flux of ≥10 8 /s, peak brightness of ≥10 20 photons/(s mm 2 mrad 2 0.1% bandwidth), and photon energy of 5.9 to 23.2 MeV. The γ-ray pulses then impinge on a thin high-Z target. More than 10 7 positrons/s in the form of sub-100 fs pulses at several MeV can be produced. Such ultrashort positron pulses can be useful as the pump-probe type positron annihilation spectroscopy as well as in other applications.

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“…Considering the ultra-high laser intensities in our scheme, the cylinder is assumed fully ionized (Al 13+ ) with an initially electron density of 700n c , where n c = m e ω 2 0 /4πe 2 is the critical density corresponding to the incident laser pulses, and ω 0 = 2π/T 0 is the laser frequency. [29,30] In each cell of plasma, 40 macroparticles are initially set.…”

Section: Simulation Modelmentioning

confidence: 99%

Dense pair plasma generation by two laser pulses colliding in a cylinder channel

Liu

et al. 2017

Chinese Phys. B

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An all-optical scheme for high-density pair plasmas generation is proposed by two laser pulses colliding in a cylinder channel. Two dimensional particle-in-cell simulations show that, when the first laser pulse propagates in the cylinder, electrons are extracted out of the cylinder inner wall and accelerated to high energies. These energetic electrons later run into the second counter-propagating laser pulse, radiating a large amount of high-energy gamma photons via the Compton back-scattering process. The emitted gamma photons then collide with the second laser pulse to initiate the Breit-Wheeler process for pairs production. Due to the strong self-generated fields in the cylinder, positrons are confined in the channel to form dense pair plasmas. Totally, the maximum density of pair plasmas can be 4.60 × 10 27 m −3 , for lasers with an intensity of 4 × 10 22 W•cm −2 . Both the positron yield and density are tunable by changing the cylinder radius and the laser parameters. The generated dense pair plasmas can further facilitate investigations related to astrophysics and particle physics.

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Electron bow-wave injection of electrons in laser-driven bubble acceleration

Cited by 18 publications

References 36 publications

High-Energy, Short-Duration Bursts of Coherent Terahertz Radiation from an Embedded Plasma Dipole

High-Energy, Short-Duration Bursts of Coherent Terahertz Radiation from an Embedded Plasma Dipole

Ultrashort-pulse MeV positron beam generation from intense Compton-scattering γ-ray source driven by laser wakefield acceleration

Dense pair plasma generation by two laser pulses colliding in a cylinder channel

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