Experimental observation of parametric X-ray radiation directed along the propagation velocity of relativistic electrons in a tungsten crystal

Aleinik, A. N.; Baldin, A. N.; Bogomazova, E. A.; Vnukov, I. E.; Kalinin, B. N.; Kubankin, A. S.; Nasonov, N. N.; Naumenko, G. A.; Потылицын, А. П.; Sharafutdinov, A.

doi:10.1134/1.1830655

Cited by 22 publications

(11 citation statements)

References 6 publications

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“…There has been a lot of experimental research in this field [1,[4][5][6][7][8][9][10][11][12][13][14][15][16] and at present an effort is made toward increasing the intensity of the PXR source. For example, the choice of the materials of the target was analyzed in Ref.…”

Section: Introductionmentioning

confidence: 99%

Radical increase of the parametric X-ray intensity under condition of extremely asymmetric diffraction

Skoromnik

Baryshevsky

Ulyanenkov³

et al. 2017

Nuclear Instruments and Methods in Physics Research Section B:

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Parametric X-ray radiation (PXR) from relativistic electrons moving in a crystal along the crystal-vacuum interface is considered. In this geometry the emission of photons is happening in the regime of extremely asymmetric diffraction (EAD). In the EAD case the whole crystal length contributes to the formation of X-ray radiation opposed to Laue and Bragg geometries, where the emission intensity is defined by the X-ray absorption length. We demonstrate that this phenomenon should be described within the dynamical theory of diffraction and predict a radical increase of the PXR intensity. In particular, under realistic electron-beam parameters, an increase of two orders of magnitude in PXR-EAD intensity can be obtained in comparison with conventional experimental geometries of PXR. In addition we discuss in details the experimental feasibility of the detection of PXR-EAD

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Section: Introductionmentioning

confidence: 99%

Radical increase of the parametric X-ray intensity under condition of extremely asymmetric diffraction

Skoromnik

Baryshevsky

Ulyanenkov³

et al. 2017

Nuclear Instruments and Methods in Physics Research Section B:

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“…However, kinematic theory failed to predict the parametric X‐ray reflection in the direction of electron velocity. The dynamic theory on the other hand has been confirmed recently by the observation of PXR in forward direction in experiments 25, 26. Blazhevich and Noskov showed that even for a thin nonabsorptive crystal in the case of symmetric reflection for particle energies $\gamma \gg \omega /\omega _{p} $ ( ω p is the plasma frequency of the crystal) the kinematic formula results in error and this error increases with increasing reflection asymmetry 27.…”

Section: Theorymentioning

confidence: 84%

Comparison of the results of kinematic and dynamic approximations for parametric X‐ray radiation in the Bragg direction

Papadakis

Trikalinos

2013

Physica Status Solidi (b)

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A theoretical study on the kinematic and dynamic approximations of parametric X-ray radiation (PXR) is presented. The results obtained are examined and compared. The ratio of the absolute maxima of kinematic and dynamic PXR can be obtained. The results are closer at lower energies and their correlation depends on the angle of incidence. These theoretical results indicate that in some energy regions and angle of incidence it may be necessary to apply the dynamic approximation of PXR for greater accuracy.

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“…For the case of symmetric reflection in the Bragg scattering geometry, a detailed theoretical description of relativistic-electron FPXR in a single crystal was given in [14]. FPXR has only been discovered experimentally in a single crystal and only in the Laue scattering geometry [15].…”

Section: Introductionmentioning

confidence: 99%

Coherent X-Ray Radiation Generated Near the Axis of the Beam of Relativistic Electrons in an Artificial Periodic Structure

Blazhevich

Drygina

Shevchuk

et al. 2020

J. Synch. Investig.

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A theory of the coherent X-ray radiation produced by a beam of relativistic electrons in an artificial periodic structure and propagating along the electron-beam axis is developed. Expressions describing the spectral-angular densities of parametric X-ray radiation in the direction close to the electron velocity vector (FPXR) and of transition radiation (TR) and their interference are obtained in the Bragg scattering geometry. An analysis based on the obtained expressions for the spectral-angular density shows possibilities of their use to determine the optimal parameters of the experiment recording the FPXR. The advantages of the experiment recording the FPXR at low electron energies ( 50 MeV) are shown.

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Experimental observation of parametric X-ray radiation directed along the propagation velocity of relativistic electrons in a tungsten crystal

Cited by 22 publications

References 6 publications

Radical increase of the parametric X-ray intensity under condition of extremely asymmetric diffraction

Radical increase of the parametric X-ray intensity under condition of extremely asymmetric diffraction

Comparison of the results of kinematic and dynamic approximations for parametric X‐ray radiation in the Bragg direction

Coherent X-Ray Radiation Generated Near the Axis of the Beam of Relativistic Electrons in an Artificial Periodic Structure

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