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

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:412

Article

Skoromnik, O. D.¹  Baryshevsky, V. G.²  Ulyanenkov, A. P.³  Feranchuk, I. D.^4,5,6 

[1] Max Planck Inst Nucl Phys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[2] Belarusian State Univ, Inst Nucl Problems, 4 Nezavisimosty Ave, Minsk 220030, BELARUS

[3] Atomicus GmbH, Schoemperlen Str 12a, D-76185 Karlsruhe, Germany

[4] Ton Duc Thang Univ, Atom Mol & Opt Phys Res Grp, 19 Nguyen Huu Tho Str,Dist 7, Ho Chi Minh City, Vietnam

[5] Ton Duc Thang Univ, Fac Appl Sci, 19 Nguyen Huu Tho Str,Dist 7, Ho Chi Minh City, Vietnam

[6] Belarusian State Univ, 4 Nezavisimosty Ave, Minsk 220030, BELARUS

关键词: Parametric X-ray radiation;    Dynamical diffraction;    Extremely asymmetric diffraction;   

DOI  :  10.1016/j.nimb.2017.09.013

来源: Elsevier

【 摘 要 】

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. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

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