Orbital angular momentum of a <i>π</i>-pulse emission by dense relativistic cold electron beam

Arteaga, J. A.; Serbêto, A.; Mendonça, J. T.; Tsui, K. H.; Monteiro, L. F.

doi:10.1063/1.5002554

Cited by 3 publications

(2 citation statements)

References 36 publications

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“…In addition, we have shown the possibility of having a spiral phase in a plasma wave and a helical profile in its intensity. This opens the possibility of applying this technique to generate helical electron beams [16,17]. Finally, we are conscious of the limitations in the three wave interaction scheme discussed here.…”

Section: Discussionmentioning

confidence: 90%

Light spring amplification in a multi-frequency Raman amplifier

et al. 2018

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We propose to amplify and compress an ultrashort Light Spring laser seed with a long Gaussian-shaped laser pump through Raman amplification. This Light Spring, which has a helical spatio-temporal intensity profile, can be built on the superposition of three distinct laser frequency components. In order to get an independent frequency amplification, two criteria are established. Besides these criteria, a non equal frequency separation is necessary to avoid resonance overlapping when three or more frequencies are involved. The independent set of equations, which describes the wave-wave interaction in a plasma, is solved numerically for two different Light Spring configurations. In both cases, the amplification and transversal compression of the seed laser pulse have been observed, with a final profile similar to that of the usual Gaussian-shaped seed pulses. In addition, two different kinds of helical plasma waves are excited. *

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Section: Discussionmentioning

confidence: 90%

Light spring amplification in a multi-frequency Raman amplifier

et al. 2018

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“…These types of waves have the property of reduced parasitic backscattering [25], but since they do not have a beat-wave waveform, no improvement in the maximum intensity is expected. These results should also carry over to using a multifrequency plasma seed instead of a seed laser [41] or to pulses with nonzero orbital angular momentum [42].…”

Section: Discussionmentioning

confidence: 91%

Multifrequency Raman amplifiers

Barth

Fisch

2018

Phys. Rev. E

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In its usual implementation, the Raman amplifier features only one pump carrier frequency. However, pulses with well-separated frequencies can also be Raman amplified while compressed in time. Amplification with frequency-separated pumps is shown to hold even in the highly nonlinear, pump-depletion regime, as derived through a fluid model, and demonstrated via particle-in-cell simulations. The resulting efficiency is similar to single-frequency amplifiers, but, due to the beat-wave waveform of both the pump lasers and the amplified seed pulses, these amplifiers feature higher seed intensities with a shorter spike duration. Advantageously, these amplifiers also suffer less noise backscattering, because the total fluence is split between the different spectral components.

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Twisted Volkov states in a plasma

Mendonça

Serbêto

2019

EPL

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This work considers quantum electron states in the field of twisted waves in a plasma. We consider electromagnetic and electrostatic waves. They can be associated with intense laser pulses carrying orbital angular momentum, and to the resulting twisted wakefields. Klein-Gordon and Dirac equations are considered. We show that twisted Volkov states of electrons in electromagnetic and electrostatic waves in a plasma can be excited, and discuss their main properties. These results support the idea that acceleration of helical electron beams in plasmas is possible.

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Orbital angular momentum of a π-pulse emission by dense relativistic cold electron beam

Cited by 3 publications

References 36 publications

Light spring amplification in a multi-frequency Raman amplifier

Light spring amplification in a multi-frequency Raman amplifier

Multifrequency Raman amplifiers

Twisted Volkov states in a plasma

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