Spontaneous emission by an electron in an arbitrary plane-wave electromagnetic field

Klimenko, Yu. I.; Павлова, О. С.; Lysov, B.A.; Klimenko, E. Yu.

doi:10.1007/bf00891677

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“…(18)]. Table I shows the characteristic relaxation times in the linear and nonlinear regimes for the collision angle α = 20 • .…”

Section: Analysis Of the Process With A Spin Flipmentioning

confidence: 99%

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Radiative polarization of electrons in a strong laser wave

Karlovets

2011

Phys. Rev. A

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We reanalyze the problem of radiative polarization of electrons brought into collision with a circularly polarized strong plane wave. We present an independent analytical verification of formulae for the cross section given by D.\,Yu. Ivanov et al [Eur.\ Phys.\ J. C \textbf{36}, 127 (2004)]. By choosing the exact electron's helicity as the spin quantum number we show that the self-polarization effect exists only for the moderately relativistic electrons with energy $\gamma = E/mc^2 \lesssim 10$ and only for a non-head-on collision geometry. In these conditions polarization degree may achieve the values up to 65%, but the effective polarization time is found to be larger than 1\,s even for a high power optical or infrared laser with intensity parameter $\xi = |{\bf E}| m c^2/E_c \hbar \omega \sim 0.1$ ($E_c = m^2 c^3/e \hbar$). This makes such a polarization practically unrealizable. We also compare these results with the ones of some papers where the high degree of polarization was predicted for ultrarelativistic case. We argue that this apparent contradiction arises due to the different choice of the spin quantum numbers. In particular, the quantum numbers which provide the high polarization degree represent neither helicity nor transverse polarization, that makes the use of them inconvenient in practice.Comment: minor changes compared to v3; to appear in PR

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“…(18)]. Table I shows the characteristic relaxation times in the linear and nonlinear regimes for the collision angle α = 20 • .…”

Section: Analysis Of the Process With A Spin Flipmentioning

confidence: 99%

“…The possibility to use the linear and non-linear Compton scattering for production of the polarized electron (positron) beams was discussed in Refs. [18][19][20][21][22][23][24] and some others. The general conclusion on this topic was made in Ref.…”

Section: Introductionmentioning

confidence: 99%

Radiative polarization of electrons in a strong laser wave

Karlovets

2011

Phys. Rev. A

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Spontaneous emission by an electron in an arbitrary plane-wave electromagnetic field

Cited by 1 publication

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Radiative polarization of electrons in a strong laser wave

Radiative polarization of electrons in a strong laser wave

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