Parametric X-ray radiation in the Smith-Purcell geometry for non-destructive beam diagnostics

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

卷:444

Article

Skoromnik, O. D.¹  Feranchuk, I. D.^2,3,4  Lu, D. V.⁵ 

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

[2] Ton Duc Thang Univ, Atom Mol & Opt Phys Res Grp, Adv Inst Mat Sci, 19 Nguyen Huu Tho Str,Tan Phong Ward,Dist 7, Ho Chi Minh City, Vietnam

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

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

[5] Univ Sci & Educ, Fac Phys, Univ Danang, B3 Bldg,459 Ton Duc Thang, Lien Chieu, Da Nang, Vietnam

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

DOI  :  10.1016/j.nimb.2019.01.003

来源: Elsevier

【 摘 要 】

We investigate parametric X-ray radiation (PXR) under condition of the extremely asymmetric diffraction, when the ultra-relativistic electron bunch is moving in vacuum parallel to the crystal-vacuum interface, close to the crystal surface. This type of geometry coincides with the well known mechanism of generation of radiation, when the self-field of the particle beam interacts with the reflecting metal grating, namely the Smith-Purcell effect. We demonstrate that in this geometry the main contribution is given via a tail region of the beam distribution, which penetrates the crystal and X-rays are radiated along the normal to the crystal surface. We determine the electron beam characteristics, when this phenomenon can be observed. It is essential that in this geometry the majority of electrons does not undergo multiple scattering and consequently the characteristics of the particle beam are not changed, thus allowing the usage of the emitted X-rays for the purpose of non-destructive beam diagnostics, which can complement the traditional knife-edge method.

【 授权许可】

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