Parametric interference Compton effect in two pulsed laser waves

Voroshilo, A. I.; Roshchupkin, S. P.; Nedoreshta, V. N.

doi:10.1088/0953-4075/48/5/055401

Cited by 6 publications

(13 citation statements)

References 23 publications

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“…We use the obtained formulas in the case of a background plane wave, as the Dirac equation then can be solved analytically [4], to do a direct comparison with the spectrum obtained using the exact solution of the Dirac equation (Volkov states) [4][5][6]. This is the usual approach for such processes [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22]. We consider the case of a short circularly polarized laser pulse, and find agreement, as expected.…”

Section: Introductionmentioning

confidence: 55%

Numerical approach to the semiclassical method of radiation emission for arbitrary electron spin and photon polarization

Wistisen

Piazza

2019

Phys. Rev. D

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We show how the semiclassical formulas for radiation emission of Baier, Katkov and Strakhovenko for arbitrary initial and final spins of the electron and arbitrary polarization of the emitted photon can be rewritten in a form which numerically converges quickly. We directly compare the method in the case of a background plane wave with the result obtained by using the Volkov state solution of the Dirac equation, and confirm that we obtain the same result. We then investigate the interaction of a circularly polarized short laser pulse scattering with GeV electrons and see that the finite duration of the pulse leads to a lower transfer of circular polarization than that predicted by the known formulas in the monochromatic case. We also see how the transfer of circular polarization from the laser beam to the gamma ray beam is gradually deteriorated as the laser intensity increases, entering the nonlinear regime. However, this is shown to be recovered if the scattered photon beam is collimated to only allow for passage of photons emitted with angles smaller than 1/γ with respect to the initial electron direction, where γ is the approximately constant Lorentz factor of the electron. The obtained formulas also allow us to answer questions regarding radiative polarization of the emitting particles. In this respect we briefly discuss an application of the present approach to the case of a bent crystal and high-energy positrons.

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Section: Introductionmentioning

confidence: 55%

Numerical approach to the semiclassical method of radiation emission for arbitrary electron spin and photon polarization

Wistisen

Piazza

2019

Phys. Rev. D

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“…In Eqs. (12) and (13) corresponds to electron-nucleus scattering [6,42], and the function M µ s1s2 corresponds to emission of a spontaneous photon [45,46]. They are determined by integrals over wave variables (17) as:…”

Section: Amplitude Of Ensb Process In Two Laser Wavesmentioning

confidence: 99%

“…It was shown in Refs. [40][41][42][43][44][45][46], that the partial cross section of the studied process within the interference region can considerably exceed the corresponding partial cross section in any other geometry, for the case of monochromatic waves. The parametric interference effect in the problem of nonresonant ENSB was confirmed in Ref.…”

Section: A Interference Kinematicsmentioning

confidence: 99%

“…The given process in external laser field was considered in Refs. (see, [45,46]). The quantity M 0 l1+s1,l2+s2 (p f , q i , ζ) (18) with respect to the value of the transferred momentum q (see, the second quality (45)), determines the amplitude of scattering of an electron with the four-momentum q i by a nucleus in the field of two pulsed waves with absorption or emission of |l 1 + s 1 | number of photons of the first wave and |l 2 + s 2 | number of photons of the second wave.…”

Section: B Resonance Conditionsmentioning

confidence: 99%

“…When considering QED processes in the external field, one can distinguish the case when the laser field is a superposition of two plane waves [37][38][39][40][41][42][43][44][45][46][47]. Herein, the cross section has the form of the sum of partial components.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Resonant parametric interference effect in spontaneous bremsstrahlung of an electron in the field of a nucleus and two pulsed laser waves

et al. 2018

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Resonant spontaneous bremsstrahlung of an electron scattered by a nucleus in the field of two moderately strong pulsed laser waves is studied theoretically. The process is studied in detail within the interference kinematic region. This region is determined by scattering of particles in the same plane at predetermined angles, at that stimulated absorption and emission of photons of external pulsed waves by an electron occurs in correlated manner. The correspondence between the emission angle and the final-electron energy is established in the kinematic region where the resonant parametric interference effect is manifested. The resonant differential cross section of ENSB process with simultaneous registration of both emission angles of the spontaneous photon and the scattered electron, can exceed by 4-5 orders of magnitude the corresponding cross section in the absence of an external field. It was shown for nonrelativistic electrons that the resonant cross section of ENSB in the field of two pulsed laser waves within the interference region in two order of magnitude may exceed corresponding cross section in the Bunkin-Fedorov kinematic region. The obtained results may be experimentally verified, for example, by scientific facilities at sources of pulsed laser radiation (SLAC, FAIR, XFEL, ELI).

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Caustic structures in x-ray Compton scattering off electrons driven by a short intense laser pulse

et al. 2016

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We study the Compton scattering of x-rays off electrons that are driven by a relativistically intense short optical laser pulse. The frequency spectrum of the laser-assisted Compton radiation shows a broad plateau in the vicinity of the laser-free Compton line due to a nonlinear mixing between x-ray and laser photons. Special emphasis is placed on how the shape of the short assisting laser pulse affects the spectrum of the scattered x-rays. In particular, we observe sharp peak structures in the plateau region, whose number and locations are highly sensitive to the laser pulse shape. These structures are interpreted as spectral caustics by using a semiclassical analysis of the laser-assisted QED matrix element, relating the caustic peak locations to the laser-driven electron motion.

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Parametric interference Compton effect in two pulsed laser waves

Cited by 6 publications

References 23 publications

Numerical approach to the semiclassical method of radiation emission for arbitrary electron spin and photon polarization

Numerical approach to the semiclassical method of radiation emission for arbitrary electron spin and photon polarization

Resonant parametric interference effect in spontaneous bremsstrahlung of an electron in the field of a nucleus and two pulsed laser waves

Caustic structures in x-ray Compton scattering off electrons driven by a short intense laser pulse

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