Quantum self-amplified spontaneous emission regime of the x-ray Compton laser

Avetissian, H. K.; Mkrtchian, G. F.

doi:10.1103/physrevstab.10.030703

Cited by 16 publications

(8 citation statements)

References 21 publications

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“…Below, we shall use the 'wave' coordinate ξ for t′: ξ = t′ − (x 3 /c) and let n = n 0 . The final result (upon combining equation (12) in [20] and ω ∼ ) B y ( , ) S reads: ( , ) just by evaluating those integrals over ξ (numerically or through some approximate analytical method), without needing to solve for the implicit equation t′ − c −1 n 0 .x(t′) = t − c −1 R. See [20].…”

Section: Spectral Asymptotic Liénard-wiechert Fields: Integral Repres...mentioning

confidence: 99%

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Calculation of the nonlinear relativistic Thomson scattering fields and Its application to electron distribution function diagnostic

Guasp

Pastor

Alvarez‐Estrada

et al. 2014

Plasma Phys. Control. Fusion

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Analytical results obtained recently of the ab-initio classical incoherent Thomson Scattering (TS) spectrum from a single-electron (Alvarez-Estrada et al 2012 Phys. Plasmas 19 062302) have been numerically implemented in a paralelized code to efficiently compute the TS emission from a given electron distribution function, irrespective of its characteristics and/or the intensity of the incoming radiation. These analytical results display certain differences, when compared with other authors, in the general case of incoming linearly and circularly polarized radiation and electrons with arbitrary initial directions. We regard such discrepancies and the ubiquitous interest in TS as motivations for this work. Here, we implement some analytical advances (like generalized Bessel functions for incoming linearly polarized radiation) in TS. The bulk of this work reports on the efficient computation of TS spectra (based upon our analytical approach), for an electron population having an essentially arbitrary distribution function and for both incoming linearly and circularly polarized radiation. A detailed comparison between the present approach and a previous Monte Carlo one (Pastor et al 2011 Nuclear Fusion 51 043011), dealing with the ab-initio computation of TS spectra, is reported. Both approaches are shown to fully agree with each other. As key computational improvements, the analytical technique yields a × 30 to × 100 gain in computation time and is a very flexible tool to compute the scattered spectrum and eventually the scattered electromagnetic fields in the time domain. The latter are computed explicitly here for the first time, as far as we know. Scaling laws for the power integrated over frequency versus initial kinetic energy are studied for the case of isotropic and monoenergetic electron distribution functions and their potential application as diagnostic tools for high-energy populations is briefly discussed. Finally, we discuss the application of these techniques to the obtention and interpretation of TS spectra in fusion plasmas and the inverse problem, i.e. the construction of the electron distribution function that best fits experimentally obtained TS data.

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Section: Spectral Asymptotic Liénard-wiechert Fields: Integral Repres...mentioning

confidence: 99%

“…Moreover, the nonlinear wave-electron interaction regime has been proposed as a candidate for the generation of coherent x-ray radiation and in this case cooperative and quantum effects will play a major role. See for example [11,12].…”

Section: Introductionmentioning

confidence: 99%

Calculation of the nonlinear relativistic Thomson scattering fields and Its application to electron distribution function diagnostic

Guasp

Pastor

Alvarez‐Estrada

et al. 2014

Plasma Phys. Control. Fusion

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“…These FEL schemes rely on the scattering of photonic quasiparticles into the output radiation by collision with the free electrons. The remarkable examples are realized in the undulator x-ray FEL [21,3] or proposed Compton backscattering x-ray FEL [22] schemes in the self-amplified spontaneous emission regime, where photons energies can be continuously upshifted up to γ-ray frequencies.…”

Section: Introductionmentioning

confidence: 99%

Free electron nanolaser based on the graphene plasmons

Avetissian,

Avchyan,

Mkrtchian

et al. 2020

Preprint

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In this paper, a possible way to achieve lasing from THz to extreme UV domain due to stimulated scattering of graphene plasmons on the free electrons is considered. The analytical-quantitative description of the proposed FEL scheme is based on the self-consistent set of the Maxwell-Vlasov equations. We study the downconversion as well as the upconversion. It is shown that the coherent downconversion of infrared radiation to THz one can be achieved using a source of very non-relativistic electrons at the resonant coupling with the graphene plasmons. Due to the strongly confined graphene plasmons, the upconversion of mid-infrared to extreme UV radiation can be achieved with the mildly relativistic electron beams. The latter is a promising mechanism for the tabletop short-wavelength free electron nanolaser.

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“…[6] as well as in Refs. [7,8] formalisms in second quantization are discussed. Moreover, a quantum fluid model is developed in Ref.…”

Section: Introductionmentioning

confidence: 99%