Electron acceleration by a tightly focused laser pulse in an ion channel

Jeet, Ram; Ghotra, Harjit Singh; Kumar, Asheel; Kant, Niti

doi:10.1140/epjd/s10053-021-00280-8

Cited by 7 publications

(3 citation statements)

References 35 publications

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“…However, these studies on Thomson scattering seldom address a tightly focused Gaussian laser pulse, whose transverse energy distribution is localized in a small range, and its transverse and longitudinal intensity distribution satisfies the Gaussian envelope [29,30], which is commonly used to describe the laboratory laser systems. It has been shown that for the tightly focused Gaussian laser pulse, the factors such as external magnetic field, chirped laser pulse and laser pulse polarization have significant effects on the electron acceleration [31][32][33].…”

mentioning

confidence: 99%

Enhanced radiation of nonlinear Thomson backscattering by a tightly focused Gaussian laser pulse and an external magnetic field

Hong¹,

Wei²,

Li³

et al. 2022

EPL

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The electron dynamics and the Thomson backscattering of an electron moving in a combined field of a tightly focused Gaussian laser pulse and an external uniform magnetic field are investigated in detail. It is found that by considering the tightly focused Gaussian laser pulse, the electron can be pushed out from the laser pulse by the ponderomotive force, resulting in the symmetry breaking of the electron dynamics from the Gaussian envelope, which can dramatically enhance the radiation intensity. It is also found that by introducing an external magnetic field, the emergence of the cyclotron motion of the electron under the external magnetic field also breaks the symmetry of the electron dynamics and enhances the radiation. Especially in the resonance case, i.e., the cyclotron frequency of the electron is close to the laser frequency, the emission spectrum is further enhanced due to the great extension of the interaction time and the symmetry breaking by the beat wave between the helix motion and the cyclotron motion of the electron in the combined field, and a platform with high radiation intensity containing the THz band has also appeared.

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mentioning

confidence: 99%

Enhanced radiation of nonlinear Thomson backscattering by a tightly focused Gaussian laser pulse and an external magnetic field

Hong¹,

Wei²,

Li³

et al. 2022

EPL

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“…Equation ( 6) describes the beam current with different harmonic numbers. Equation ( 3) is changed to Equation (7) according to the same normalized method as Equations ( 4)- (6).…”

Section:   mentioning

confidence: 99%

“…The space-charge field (SCF) [1][2][3][4][5][6] is an important physical factor in electronic vacuum devices, particle accelerators [7][8][9][10][11][12], free electron lasers (FEL) [13] and plasma systems [14][15][16][17][18]. It is generated by electrostatic interaction between charged particles.…”

Section: Introductionmentioning

confidence: 99%

Improved Algorithms for Calculating the Space-Charge Field in Vacuum Devices

Luo

Zhang

et al. 2022

Electronics

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The space-charge field (SCF) is a key factor in vacuum electronic devices, accelerators, free electron lasers and plasma systems, etc. The calculation of the SCF is very important since it has a great influence on the precision of numerical simulation results. However, calculating the SCF usually takes a lot of time, especially when the number of simulated particles is large. In this paper, we used a vectorization, parallelization and truncation method to optimize the calculation of the SCF based on the traditional calculation algorithms. To verify the validity of the optimized SCF calculation algorithm, it was applied in the performance simulation of a millimeter wave traveling wave tube. The results showed that the time cost was reduced by three orders compared with conventional treatment. The proposed algorithm also has great potential applications in free electron lasers, accelerators and plasma systems.

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