Theoretical investigation of the parametric X-ray features

Феранчук, И. Д.; Ivashin, A. V.

doi:10.1051/jphys:0198500460110198100

Cited by 123 publications

(73 citation statements)

References 4 publications

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“…PXR is highly directed, quasimonochromatic, tunable, polarized, and spectrally intense [6][7][8][9][10]. At small Bragg angles the PXR process is a particularly efficient bright source of hard x rays [8].…”

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confidence: 99%

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Observation of higher order parametric x-ray spectra in mosaic graphite and single silicon crystals

et al. 1993

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confidence: 99%

“…Since first predicted in the early 1970's [1-3], a number of classical and quantum electrodynamical treatments of PXR have been developed, based on a kinematic point of view [4], and on the dynamical theory of x-ray diffraction [5][6][7][8]. PXR is highly directed, quasimonochromatic, tunable, polarized, and spectrally intense [6][7][8][9][10].…”

mentioning

confidence: 99%

Observation of higher order parametric x-ray spectra in mosaic graphite and single silicon crystals

et al. 1993

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“…The theoretical description of the intensity distribution of PXR [51,52,45,53,54], suitably modified for self-absorption and multiple-scattering effects, has been tested for a broad range of electron energies extending from 3.5 MeV [55,56] to about 1 GeV [46]. It was found to be accurate within 12%.…”

Section: Parametric X-radiationmentioning

confidence: 99%

Coherent X-rays at MAMI

et al. 2006

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Abstract. Coherent radiation in the range from soft X-rays up to hard X-rays, produced by the lowemittance electron beam of MAMI, can be used for various applications. Novel types of interferometers have been developed for the measurement of the complex index of refraction of thin self-supporting foils. For the vacuum ultraviolet and soft X-ray region the interferometer consists of two collinear undulators, and a grating spectrometer. A foil placed between the undulators causes a phase shift and an attenuation of the oscillation amplitude. The complex index of refraction has been measured at the L 2,3-absorption edges of nickel. A novel method is described for the measurement of the X-ray magnetic circular birefringence. For the hard X-ray region the interferometer consists of two foils at which the 855 MeV electron beam produces transition radiation. Distinct interference oscillations have been observed as a function of both, the photon emission angle and the distance between the foils. The refractive index decrement δ(ω) of a 2 µm thick nickel sample foil has been measured at X-ray energies around the K absorption edge at 8333 eV and at 9930 eV with an accuracy of better than 1.5 %. The line width of parametric X radiation (PXR) was measured in backward geometry with a Si single-crystal monochromator. Upper limits of the line width of 42 meV, 50 meV, and 44 meV, have been determined for the (333), (444) and (555) reflections at photon energies of 5932 eV, 7909 eV, and 9887 eV, respectively. Small angle scattering of the electrons in the crystal leads to a stochastic frequency modulation of the exponentially damped wave train which results in the line broadening. To elucidate the quest if the production of PXR is a kinematical or a dynamical process the radiation from silicon single-crystal targets, emitted close to the electron direction, has been studied. The observed interference structures and the narrow-band radiation in forward direction shows that PXR is produced in a dynamical process. .Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity) -41.60.-m Radiation by moving charges -41.50.+h X-ray beams and X-ray optics PACS.

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“…When a fast charged particle crosses a single crystal, its Coulomb field is scattered by a system of parallel atomic planes in the crystal to generate para metric X-ray radiation (PXR) [14][15][16] whose photons together with the DTR photons move in the Bragg scattering direction. At present, there are two approaches to describe the PXR process: kinematic [17,18] and dynamic [15,16,19]. It should be noted that the diffracted transition radiation by itself is a dynamic effect, namely the dynamic diffraction effect.…”

Section: Introductionmentioning

confidence: 99%

Coherent X-ray radiation from a relativistic electron in a combined medium

Blazhevich

Носков

2014

J. Exp. Theor. Phys.

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Abstract-A theory of coherent X-ray radiation from a relativistic electron crossing a com bined m edium that consists of am orphous and crystal plates is constructed w ithin the dynamic diffraction theory. The field reflec tion asymmetry relative to the target surface determ ined by the angle between the atom ic planes and the target surface is taken into account in the theory. The expressions describing the spectral-angular densities of para m etric X-ray and diffracted transition radiations in this m edium are derived and investigated.

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Theoretical investigation of the parametric X-ray features

Cited by 123 publications

References 4 publications

Observation of higher order parametric x-ray spectra in mosaic graphite and single silicon crystals

Observation of higher order parametric x-ray spectra in mosaic graphite and single silicon crystals

Coherent X-rays at MAMI

Coherent X-ray radiation from a relativistic electron in a combined medium

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