Generation of attosecond electron bunches and x-ray pulses from few-cycle femtosecond laser pulses

Ferri, Julien; Horný, Vojtěch; Fülöp, Tünde

doi:10.1088/1361-6587/abe885

Cited by 13 publications

(4 citation statements)

References 43 publications

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“…The generation of relativistic electron bunches with durations in the attosecond range can lead to pump/probe beams, which can be fruitfully employed to unveil ultrafast dynamics [1]. In the context of plasma wakefield acceleration either driven by laser pulses (LWFA) [2] or particle beams (PWFA) [3], several methods have been proposed to specifically generate electron beams with a duration below the femtosecond scale, from the pioneering work about beam compression of beams externally injected ahead of the driver laser pulse [4][5][6], dense attosecond beams with up-ramp density transitions [7], attosecond beams via density modulations [8], attosecond trains obtained by betatron quivering modulations [9,10], few-cycle TW pulses-driven electron beams [11,12], attosecond trains via ionization injection [13] and high-brightness electron beams through ionization injection in hybrid LWFA/PWFA schemes [14,15]. As the disentanglement of the electron beam parameters including length, charge, average energy, energy spread and emittance are of paramount importance for the feasibility of the pump/probe attosecond source, thus a flexible injection/acceleration scheme should be preferred.…”

Section: Introductionmentioning

confidence: 99%

Attosecond Pulses from Ionization Injection Wakefield Accelerators

Tomassini,

Horny,

Doria

2023

Instruments

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High-quality ionization injection methods for wakefield acceleration driven by lasers or charged beams (LWFA/PWFA) can be optimized so as to generate high-brightness electron beams with tuneable duration in the attosecond range. We present a model of the minimum bunch duration obtainable with low-emittance ionization injection schemes by spotting the roles of the ionization pulse duration, of the wakefield longitudinal shape and of the delay of the ionization pulse position with respect to the node of the accelerating field. The model is tested for the resonant multi-pulse ionization injection (ReMPI) scheme, showing that bunches having a length of about 300 as can be obtained with an ionization pulse having a duration of 30 fs FWHM.

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Section: Introductionmentioning

confidence: 99%

Attosecond Pulses from Ionization Injection Wakefield Accelerators

Tomassini,

Horny,

Doria

2023

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“…However, the produced γ-ray pulses are non-isolated, since the scattering laser pulse is of multi-cycle, resulting in a train of attosecond γ-ray pulses. Most recently, a scheme for isolated attosecond electron bunch generation and brilliant attosecond x-ray emission has been proposed in the laser Wakefield acceleration regime [40]. The produced x-ray pulse is isolated with a duration of 800 as, but a low photon energy.…”

Section: Introductionmentioning

confidence: 99%

Generation of isolated and polarized γ-ray pulse by few-cycle laser irradiating a nanofoil

Zhang¹,

Liu²,

Tang³

et al. 2022

Plasma Phys. Control. Fusion

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An isolated ultra-short γ-ray pulse is a unique tool for measuring ultrafast-physics process, such as imaging of intra-nuclear dynamics and inner-shell electron dynamics. Here, we propose an all-optical efficient scheme for generating isolated ultra-short γ-ray pulse from a laser-driven nanofoil. When a few-cycle circularly polarized laser pulse with an intensity of 10 22 W/cm 2 irradiates a nanofoil, the electrons in the nanofoil are pushed forward collectively, forming a single relativistic electron sheet (RES) with the charge of nC. The electrons are substantially accelerated to high energies by the super-ponderomotive force of the laser. Then a counter-propagating laser pulse with a peak intensity of 10 21 W/cm 2 collides with the RES, resulting in the generation of an isolated sub-femtosecond γ-ray pulse via nonlinear Compton scattering. The effects of laser polarization on the polarization degree of γ-rays is investigated by using a proof-of-principle calculation. It is shown that a highly-polarized isolated γ-ray pulse with the cut-off energy of 100 MeV can be eventually generated in a head-on colliding configuration when the scattering laser is a linearly polarized laser. Such an isolated ultra-short polarized γ-ray source would provide critical applications in high energy physics, laboratory astrophysics and nuclear physics.

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“…The appropriate laser pulse is shorter than the plasma period 5 and the typical measured electron bunch charge is up to hundreds of pC with a duration of a few femtosecond [9,10]. It is predicted that bunches with duration slightly shorter than a femtosecond can be generated when advanced injection techniques are employed [11][12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Generation of single attosecond relativistic electron bunch from intense laser interaction with a nanosphere

Horný

Veisz

2021

Plasma Phys. Control. Fusion

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Ultrahigh-intensity laser-plasma physics provides unique light and particle beams as well as novel physical phenomena. A recently available regime is based on the interaction between a relativistic intensity few-cycle laser pulse and a sub-wavelength-sized mass-limited plasma target. Here, we investigate the generation of electron bunches under these extreme conditions by means of particle-in-cell simulations. In a first step, up to all electrons are expelled from the nanodroplet and gain relativistic energy from time-dependent local field enhancement at the surface. After this ejection, the electrons are further accelerated as they copropagate with the laser pulse. As a result, a few, or under specific conditions isolated, pC-class relativistic attosecond electron bunches are generated with laser pulse parameters feasible at state-of-the-art laser facilities. This is particularly interesting for some applications, such as generation of attosecond x-ray pulses via Thomson backscattering.

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Generation of attosecond electron bunches and x-ray pulses from few-cycle femtosecond laser pulses

Cited by 13 publications

References 43 publications

Attosecond Pulses from Ionization Injection Wakefield Accelerators

Attosecond Pulses from Ionization Injection Wakefield Accelerators

Generation of isolated and polarized γ-ray pulse by few-cycle laser irradiating a nanofoil

Generation of single attosecond relativistic electron bunch from intense laser interaction with a nanosphere

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