Study of Features of the Diffraction of X Rays in a Quartz Crystal Modulated by Longitudinal and Transverse Ultrasonic Vibrations

JETP Letters - Features of the simultaneous action of longitudinal and transverse ultrasonic vibrations in the quartz crystal on the parameters of reflected X-rays are studied. It is shown that...     

Development of methods for ultrasonic scanning of X-ray wavelength

The method for X-ray wavelength tuning using an adaptive element (a quartz monolithic resonator modulated by a standing longitudinal low-frequency ultrasonic wave) has been proposed and implemented. This method is characterized by high tuning accuracy and possibility of scanning X-ray beam parameters with a time resolution of up to 3 μs.     

Accurate Control of Synchrotron Radiation Parameters Using X-ray Acoustic Longitudinal Resonators: Paratellurite (ТeO2) Crystals

Crystallography Reports - When carrying out experiments on the P23 beamline of the Petra III synchrotron source (Hamburg, Germany), high efficiency of X-ray acoustic longitudinal resonators for...     

Rocking Curve Measurement for Deformed Crystals Using an Adaptive X-Ray Optical Bending Monochromator

A technique for recording rocking curves using an X-ray optical bending element is proposed to study the changes in the defect structure of single crystals under external impacts. The technique has been approved for a silicon crystal under a uniaxial mechanical load.     

Evolution of X-ray rocking curves for paratellurite and lithium fluoride crystals under intense ultrasound

Local deformations of the crystal lattice under ultrasonic loading over a wide range of amplitudes have been investigated by means of recording the X-ray rocking curves for paratellurite and lithium fluoride single crystals.     

Investigations of the Growth Processes of Bismuth-Germanate Crystals (Bi<Subscript>12</Subscript>GeO<Subscript>20</Subscript>) from the Melt using the X-Ray Diffraction Characteristics of Natural Lateral Faces

Single crystals of bismuth-germanate grown by the Czochralski method and possessing a combination of piezoelectric, electro-optical and magneto-optical characteristics are studied. The possibility of the non-destructive quality control of the grown crystals by X-ray diffraction investigation of their natural lateral faces is shown.     

Adaptive X-Ray Optical Elements Based on Bending Piezoactuators: Possibilities and Prospects of Practical Application

Crystallography Reports - The possibilities of a new class of adaptive X-ray optical elements based on bending piezoelectric actuators for practical implementation of time-resolved experiments...     

Some aspects of applying polynorms in field theory

We consider some possibilities of physical applications of pseudonorms of an order higher than two (polynorms) in hypercomplex algebras, primarily in the biquaternion algebra. We can then view several known questions from a new standpoint. In particular, we show that considering the 4-norm in field theory ensures a natural transition from the Maxwell electrodynamics to the nonlinear Born-Infeld electrodynamics. Moreover, the algebraic approach shows that it is natural to add the Skyrme nonlinear term to the meson Lagrangian of nuclear forces. We also find that the only fourth-order additional term can be naturally added to the Skyrme Lagrangian, which might improve the model properties.