scholarly journals Total spectrum of photon emission by an ultra-relativistic positron channelling in a periodically bent crystal

2000 ◽  
Vol 26 (6) ◽  
pp. L87-L95 ◽  
Author(s):  
Wolfram Krause ◽  
Andrei V Korol ◽  
Andrey V Solov'yov ◽  
Walter Greiner
Keyword(s):  
Photon Emission ◽  
Bent Crystal ◽  
Total Spectrum

scholarly journals PHOTON EMISSION BY AN ULTRA-RELATIVISTIC PARTICLE CHANNELING IN A PERIODICALLY BENT CRYSTAL

1999 ◽  
Vol 08 (01) ◽  
pp. 49-100 ◽  
Author(s):  
ANDREI V KOROL ◽  
ANDREY V SOLOV'YOV ◽  
WALTER GREINER
Keyword(s):  
Charged Particle ◽  
Acoustic Wave ◽  
Relativistic Particle ◽  
Photon Emission ◽  
Bent Crystal ◽  
Transverse Acoustic ◽  
Wide Range ◽  
Relativistic Charged Particle ◽  
New Type ◽  
Γ Rays

This paper is devoted to a detailed analysis of the new type of undulator radiation generated by an ultra-relativistic charged particle channeling along a crystal plane, which is periodically bent by a transverse acoustic wave, as well as to the conditions limiting the observation of this phenomenon. This mechanism makes feasible the generation of electromagnetic radiation, both spontaneous and stimulated, emitted in a wide range of the photon energies, from X- up to γ-rays.

X-ray diffraction properties of curved crystal diffractors

1992 ◽  
Vol 50 (2) ◽  
pp. 1734-1735
Author(s):  
W. Z. Chang ◽  
D. B. Wittry
Keyword(s):  
Diffraction Theory ◽  
X Rays ◽  
Diffraction Image ◽  
X Ray Diffraction ◽  
Rocking Curve ◽  
X Ray ◽  
Bent Crystal ◽  
Diffraction Geometry ◽  
Crystal Parameter ◽  
Quantitative Procedure

Since Du Mond and Kirkpatrick first discussed the principle of a bent crystal spectrograph in 1930, curved single crystals have been widely utilized as spectrometric monochromators as well as diffractors for focusing x rays diverging from a point. Curved crystal diffraction theory predicts that the diffraction parameters - the rocking curve width w, and the peak reflection coefficient r of curved crystals will certainly deviate from those of their flat form. Due to a lack of curved crystal parameter data in current literature and the need for optimizing the choice of diffraction geometry and crystal materials for various applications, we have continued the investigation of our technique presented at the last conference. In the present abstract, we describe a more rigorous and quantitative procedure for measuring the parameters of curved crystals.The diffraction image of a singly bent crystal under study can be obtained by using the Johann geometry with an x-ray point source.

Sign in / Sign up

Export Citation Format

Share Document