Electron acceleration in underdense plasmas described with a classical effective theory

Pocsai, Mihály András; Varró, Sándor; Barna, Imre Ferenc

doi:10.1017/s0263034615000294

Cited by 2 publications

(2 citation statements)

References 24 publications

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“…In this section we discuss the advantages and disadvantages of applying bichromatic (q = 2) laser pulses for laser and plasma based electron acceleration. As discussed in our earlier work [9], within the confines of the present approach the n m < 1 case agrees quite well with the n m = 1 case, since at relevant plasma densities the refraction index of an underdense plasma differs negligibly from unity.…”

Section: Resultssupporting

confidence: 85%

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Electron acceleration by a bichromatic chirped laser pulse in underdense plasmas

Pocsai

Varró

Barna

2016

Nuclear Instruments and Methods in Physics Research Section B:

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A theoretical study of laser and plasma based electron acceleration is presented. An effective model has been used, in which the presence of an underdense plasma has been taken account via its index of refraction n m . In the confines of this model, the basic phenomena can be studied by numerically solving the classical relativistic equations of motion. The key idea of this paper is the application of chirped, bichromatic laser fields. We investigated the advantages and disadvantages of mixing the second harmonic to the original λ = 800 nm wavelength pulse. We performed calculations both for plane wave and Gaussian pulses.

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Section: Resultssupporting

confidence: 85%

“…This study is the sequel of our recent work [9]. In that paper, an effective theory for describing electron acceleration in underdense plasmas has been presented.…”

Section: Introductionmentioning

confidence: 97%

Electron acceleration by a bichromatic chirped laser pulse in underdense plasmas

Pocsai

Varró

Barna

2016

Nuclear Instruments and Methods in Physics Research Section B:

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Wide bandwidth THz emission based on two color chirped laser plasma interaction

Saeed¹,

Khorsandi²

2023

Opt. Continuum

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This study examined the impact of chirping the input pulses on the amplification of a wide bandwidth THz wave emitted from a plasma slab within a range of input wavelengths from 800 nm to 3.9 µm. It was found that in a normal case of interaction when the injected pulses are highly chirped, flowerthorn-like fluctuations raised in the transverse current density of the plasma, and a THz emission with a higher amplitude within a wide band of 50 THz could be reached. Employing the cross-focusing scheme, the amplitude of the THz wave at 3.9 µm is further enhanced to about 43 times the ones obtained at 800 nm when the two-color pulses are weakly chirped down to 3 × 10−4 rad/s2. A significant increase of 233 times received in THz radiation when a weakly-chirped regime of delayed cross-focusing interaction is established and the intensity of the delayed pulse is increased to 1015 W/cm2, beyond the ionization threshold of Argon gas. The profile change of the fundamental and its second-harmonic waves indicated that a flat-top form is capable of enhancing the THz amplitude approximately by 8 times compared to the case when an ordinary Gaussian profile is used. The obtained results have confirmed that a combination of the type of interaction, chirp value, and the profile of inputs is crucial for enlarging the THz magnitude and domain.

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Electron acceleration in underdense plasmas described with a classical effective theory

Cited by 2 publications

References 24 publications

Electron acceleration by a bichromatic chirped laser pulse in underdense plasmas

Electron acceleration by a bichromatic chirped laser pulse in underdense plasmas

Wide bandwidth THz emission based on two color chirped laser plasma interaction

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