ASRP-2026 School & BRIA-2026 Conference

Contribution List

131. Blackbody Radiation: a Calorimetric Measurement of the Stefan-Boltzmann Constant.

DANILO GIULIETTI

The properties of so-called blackbody radiation are essential for characterizing the ones of any radiating surface. Studies in this field are typically conducted using radiometric methods. This presentation will illustrate a calorimetric method for determining the Stefan-Boltzmann constant and the emissivity of metals at low temperatures, the latter property being of great interest in the...

125. ELECTRON TRANSPORT PHENOMENA IN FILMS WITH SURFACE ROUGHNESS

Mr Karen Aramyan (Institute of Applied Problems of Physics (IAPP) of NAS RA)

A theory of galvanic and thermomagnetic phenomena in thin films with an isotropic energy spectrum is developed, taking into account electron scattering by film surface roughens. Expressions for the components of galvano- and thermomagnetic tensors in films with rough surfaces were found in the presence of a magnetic field perpendicular to the film plane, an electric field, and a temperature...

126. From First Experiments to Brighter Sources: Nonlinear Compton Scattering, Harmonics, and Control Strategies

Prof. Sergey Rykovanov

Nonlinear Compton scattering in collisions of relativistic electron beams with intense laser pulses offers a promising route toward compact tunable X-ray and gamma-ray sources. As the laser intensity increases, the radiation spectrum is expected to depart from the linear regime through several characteristic effects, including redshift and broadening of the main spectral line, an increase in...

128. Improvement of Detection Limits in Gamma Spectroscopy for Radioactivity Analysis in Thermal Waters Using Monte Carlo Simulation

ANES ABDESSAMED BOUTAHRA (Batna 1 University)

The accurate assessment of natural radioactivity in thermal waters is often limited by low activity concentrations and the sensitivity of detection systems. Improving detection limits is therefore essential for reliable environmental monitoring and radiological evaluation.

In this study, sixteen thermal water samples were collected from various hot spring sources in eastern Algeria. The...

132. Investigation of Cristal Imperfections with Multiple Four-Crystal X-ray Interferometers

Inga Babayan (Institute of Applied Problems of Physics of the National Academy of Sciences of the Republic of Armenia)

Abstract. A double four-crystal X-ray interferometer has been developed and tested, and moiré patterns have been obtained with it. On the basis of this interferometer, a new method for studying imperfections in crystalline materials has been proposed. It is shown that double X-ray interferometers make it possible to describe more completely the stress field in crystals caused by defects and to...

129. New Salts of Amino Acids, The Discovery of a New Class of Salts and Their Possible Applications

Aram Petrosyan

This lecture will provide an overview of the results of the authors who were awarded
the “Prize of the National Academy of Sciences of Armenia-2025”.

1 Salts of amino acids with simple, dimeric, trimeric and tetrameric cations

2 Discovery of a new class of salts containing different amino acids

3 Discovery of a new type of polymorphism

4 A new effective remedy for the...

130. Principles of LASER

Prof. DANILO GIULIETTI

The physical principles underlying the operation of a LASER will be presented, along with the main modes in which it can operate and the salient characteristics of the radiation it emits. Finally, the different characteristics of LASERs used in controlled thermonuclear fusion experiments and those on particle acceleration in plasmas will be considered.

124. Radiation of twisted photons in elliptical three-frequency undulators

Mr Sergey Bragin (Tomsk Polytechnic University)

Photons with orbital angular momentum are an effective tool for investigating rotational degrees of freedom in quantum systems [1]. In this work, we theoretically investigate the generation of such photons in three-frequency elliptical undulators, which serve as a bright source of photons in composite twisted states – linear superpositions of modes with definite projections of the total...

133. Radiation protection for laser-based accelerators

Adolfo Esposito

Since few years, following the development of lasers able to focus ultra-short high intensity pulses onto targets, the generation of ionizing radiation by intense lasers became possible. This paper focuses on the radiological protection aspects, mainly licensing requirements, prompt and residual radiation fields, shielding of produced radiations, shielding materials, radiation monitoring,...

127. Solution of the Klein-Gordon equation in external Yang-Mills gauge field

Dr Vahram Parazian (IAPP NAS RA)

Exact solutions of the Klein-Gordon equation in an external non-Abelian gauge field with an SU(N) symmetry group have been obtained. The external field is a solution of the Yang-Mills equations and describes a plane wave on the light cone. The obtained solutions form a complete set and can be used in the procedure of canonical quantization of scalar fields.

123. X-ray diagnostic tools for templates of electronic chips with a topology of 1–30 nm

Leonid Goray (Alferov University)

The development of next-generation semiconductor technologies necessitates the use of modern methods for monitoring electronic circuit topology parameters, including critical dimensions, material homogeneity, and roughness. These challenges are particularly pressing in the fabrication of templates for high-aperture projection lithography in the extreme UV (EUV) and beyond (EUVL, BEUVL) ranges...