Diffraction of real and virtual photons in a pyrolytic graphite crystal as source of intensive quasimonochromatic X-ray beam

Bogomazova, E. A.; Kalinin, B. N.; Naumenko, G. A.; Padalko, D. V.; Потылицын, А. П.; Sharafutdinov, A.; Vnukov, I. E.

doi:10.1016/s0168-583x(02)01435-0

Cited by 20 publications

(9 citation statements)

References 15 publications

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“…The divergence of the electron beam incident on the target, multiple scattering of the electrons in the crystal, collimation of radiation and other experimental factors were taken into account according to the procedure described in [18].…”

Section: Theoretical Considerationsmentioning

confidence: 99%

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Influence of real photon diffraction on parametric X-ray radiation angular distribution in thin perfect crystals

Goponov

Laktionova

Pligina

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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Measurements of an electron beam parameters a b s t r a c tUsing the previously proposed method of calculating diffracted photon yields in thin perfect crystals, analyzed a relative contribution of parametric X-ray radiation and diffracted photons in thin crystals. It is shown that for average energy of electrons and the center of the PXR spot diffracted real photon contribution is comparable to the yield of parametric X-ray radiation and determines the shape of the angular distribution of the total emission in this range of observation angles. The possibility of estimating electron beams parameters based on the results of PXR angular distribution measurements is discussed. It is shown that for energy of electrons by far larger than 1 GeV yield of diffracted transition radiation in narrow angular cone becomes predominating and determines the shape of the angular distribution of total emission in the center of radiation spot.Ó 2015 Published by Elsevier B.V.

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Section: Theoretical Considerationsmentioning

confidence: 99%

“…To calculate spectral-angular distribution of bremsstrahlung with account multiple scattering in accordance with the methodology [18], the target is divided into a large number of layers with thickness Dt.…”

Section: Theoretical Considerationsmentioning

confidence: 99%

Influence of real photon diffraction on parametric X-ray radiation angular distribution in thin perfect crystals

Goponov

Laktionova

Pligina

et al. 2015

Nuclear Instruments and Methods in Physics Research Section B:

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“…These shortcomings require the development of new methods for measuring the transverse dimensions of a particle beam based on measuring the total angular distribution of the PXR and taking into account its features, in particular, the azimuthal asymmetry and the contributions of other coherent radiation mechanisms such as diffracted transition radiation (DTR) and diffracted bremsstrahlung (DB); see, e.g., Refs. [6,9,10], and references therein.…”

Section: Introductionmentioning

confidence: 99%

New method of electron beam transverse size measurement by angular distribution of emission in a thin crystal

Goponov

Laktionova

Shatokhin

et al. 2019

Phys. Rev. Accel. Beams

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A technique is proposed for determining beam dimensions on a target by measuring two-dimensional angular distributions of the radiation for two distances between the crystal where the radiation is generated and a coordinate detector. The dimensions are determined from the results of a least squares method procedure with varying parameters, where the adjustable function is the distribution for a shorter distance and the fitting function is the convolution of the angular distribution at a greater distance with a twodimensional Gaussian distribution whose parameters are uniquely related to the beam dimensions on the target and the distances between the crystal and the detector. The minimum measured beam sizes are about 50-60 μm for the parametric x-ray mechanism and an electron energy of less than 1 GeV and 10-15 μm for the mechanism of diffracted transition radiation and electrons with an energy above several GeV.

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“…In the exper iment [12], for the observation angle of 90° and E0 = 900 MeV, the error increased because of the uncertainty of the average number of passages of electrons in the ring accelerator through a thin target and the strong dependence of this value on the crystal orientation [21] and was about 25-30%. The accelerator parameters, the experimental scheme, and the technique of per forming the measurements are described are described in detail in [16,17,22].…”

Section: Experimental Device and Methodsmentioning

confidence: 99%

Estimation of crystal sample structure by means of fast electron radiation

Baklanov

Vnukov

Zhandarmov

et al. 2010

J. Synch. Investig.

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The dependence of the characteristics of X-ray radiation occurring under fast electron transmis sion through a crystal on a sample structure has been analyzed. A method to estimate the size of the crystal microblocks by means of the yield ratio of the parametric X-ray radiation and diffracted bremsstrahlung and transition radiation for different observation angles has been suggested. The possibility of estimating the dimension of the microblocks using the ratio of the intensities of these emission mechanisms for the same observation angle and several reflection orders has been discussed.

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Diffraction of real and virtual photons in a pyrolytic graphite crystal as source of intensive quasimonochromatic X-ray beam

Cited by 20 publications

References 15 publications

Influence of real photon diffraction on parametric X-ray radiation angular distribution in thin perfect crystals

Influence of real photon diffraction on parametric X-ray radiation angular distribution in thin perfect crystals

New method of electron beam transverse size measurement by angular distribution of emission in a thin crystal

Estimation of crystal sample structure by means of fast electron radiation

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