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  • Abstracts of Journals

    • V.T. Lazurik, V.M. Lazurik, G.F. Popov , Yu. Rogov .
      The Use of the Program ModeRTL in Control System of Industrial Electron Accelerator.
      Proceedings of the PCaPAC, 2002, Frascati, Italy, p. 14-18.
    • Abstract. Authors have integrated the software ModeRTL (Modeling of Radiation-Technological Line) into the control system of the RTL incorporating an industrial linear electron accelerator with a scanner of electron beam and a conveyor. An operation of the control system is based on monitoring of electron beam and radiation facilities parameters, calculations of the absorbed dose distribution in an irradiated materials, and elaboration of control signals on value of deviation between calculated and calibration data for the specific radiation–technological process. The control system uses the thermoacoustic emission, generated by the pulsed electron beam in thin rods and plates, as a source of primary information about the current status of characteristics of each electron pulse of scanning electron beam.

      The main function of the software ModeRTL in control system are the following: processing of the acoustic response amplitude from radiation-acoustic dosimeter and restoration of electron intensity and a spatial profile of radiation field on the surface of irradiated materials; calculation of the absorbed dose, charge and temperature distribution in an irradiated materials; comparison of calculated absorbed dose and calibration data that are stored in data base; preparation and verification of control commands for radiation facilities. Due to fast analytical methods, the software ModeRTL execute all functions in real-time regime.

      The general architecture, the main components, and the mathematical aspects of the software ModeRTL will be discussed in the paper.

    • Lazurik V.T., Lazurik V.M., Popov G.F., Rogov Yu.
      Modeling of processes of an irradiation for industrial technologies.
      Journal of Kharkiv University, N.605, 2003. Series "Mathematical Modelling. Information Technology. Automated Control Systems, Issue 2". - p. 72-89.
    • Abstract. The conception for design of the Radiation-Technological Office (RT-Office) was developed by authors. RT-Office realize computer technologies at. all basic stages of works execution on the radiation-technological lines (RTL) using irradiators of electron beam (EB), X-ray and y-ray. RT Office is the common program shell which provides flexible intellectual interaction between specialized modules and databases for optimal planning of the process of an irradiating and control of its realization. RT-Office is accessible to a broad audience of users without a special knowledge in the field of transport of ionizing radiation and computer technologies. The descriptions of the specialized programs developed by authors ModeRTL, XR-Soft and y-ray-Soft which are based RT-Office modules and intended for simulation of EB, X-ray, and y-ray processing respectively are considered in the paper.

    • Lazurik V.T., Lazurik V.M., Popov G., Rogov Yu.
      RT-Office for Optimization of Industrial EB and X-Ray Processing.
      Problems of atomic science and technology. 2004.-N 1. Series: Nuclear Physics Investigation (43), p. 186-189.
    • Abstract. The conception for design of the Radiation-Technological Office (RT-Office) was developed by authors. RT-Office realize computer technologies at all basic stages of works execution on the radiation-technological lines (RTL) using irradiators of electron beam (EB), X-ray and γ-ray in the energy range from 0.1 to 25 MeV. The description of the specialized programs ModeRTL and XR-Soft which are based on the RT-Office modules and intended for simulation of EB and X-ray processing respectively is considered in the paper.

    • Kaluska I., Lazurik V.M., Popov G., Rogov Yu., Zimik Z.
      Dose Distribution in the Heterogeneous Materials Irradiated by Electron Beams.
      Problems of atomic science and technology. 2004.-N 1. Series: Nuclear Physics Investigation (42), p. 184-186.
    • Abstract. The simulation of the absorbed depth-dose distribution (DDD) near to boundary of the contacting materials with different density and/or by effective atomic numbers of materials irradiated by a scanning electron beam was fulfilled. The simulation was conducted with utilization of the software ModeRTL. The experimental validation of the obtained theoretical predictions related with abnormal behavior of the DDD in heterogeneous materials was fulfilled on the radiation-technological lines (RTL) with linear electron accelerator LAE 13/9, INCT, Warsaw.

    • Kaluska I., Lazurik V.T., Lazurik V.M., Popov G., Rogov Yu., Zimik Z.
      Basic Laws of Boundaries Effects for the Absorbed Dose Distribution of Electrons in the Heterogeneous Materials.
      Journal of Kharkiv University, N.619, 2004. Physical series "Nuclei, Particles, Fields", Issue 1/23/.- p.37-48.
    • Abstract. The anomalies of the absorbed dose distribution of electrons near the boundary of contacting materials at orientation in parallel with incident electron beam were predicted by computer simulation with use the ModeRTL software. Dosimetric experiments were performed on radiation-technological line to validate the theoretical predictions. Heterogeneous targets were irradiated by scanning electron beam with electron energy 10 MeV on moving conveyer. The basic laws predicted by simulation methods on curves of depth-dose distribution of electrons near the boundary of contacting materials with different densities and/or atomic numbers were experimentally confirmed. The physical models for explanation of observed boundaries effects are considered in the report.

      KEY WORDS: absorbed dose, electron beam, boundary effects, simulation, experimental validation.

    • V. T.Lazurik, V. M. Lazurik, G. F. Popov, Yu.V. Rogov.
      Simulation methods for quality control of radiation technologies.
      Proceed. of the IAEA Coordination Meeting of the TC RER/8/10 project. "Status and prospects of radiation processing in Europe". Warsaw, Poland. 2005. P.141-156.
    • Abstract. The conception of the information technology for modeling of industrial radiation processes was elaborated by authors for development and establishment of standard procedures for control and validation processes. Information technology includes the following main components: Radiation-Technological Office (RT-Office); software tool kit with specialized software for electron beam (EB), X-ray (bremsstrahlung) and γ-ray processing; databases with information related to industrial radiation facilities and features of different radiation technologies; trainer courses for education of broad audience of end-users to use of simulation methods for quality control of industrial radiation processing. The self-consistent geometrical and physical models with corresponding software were elaborated for basic constructions of industrial radiation-technological lines (RTLs) with EB, X-ray and γ-ray irradiators. The features of software for simulation of EB, X-ray and γ-ray processing, dose mapping, results for experimental validation of theoretical predictions for depth dose distributions in the heterogeneous targets are discussed in the report.

    • I. Kaluska, V. T.Lazurik, V. M. Lazurik, G. Popov, Z.Zimek.
      The features of electron dose distributions in circular objects: Comparison of Monte Carlo calculation predictions with dosimetry.
      Radiation Physics and Chemistry. Vol. 76, Issue 11-12, P. 1815-1819, 2007.
    • Abstract. The features of electron dose field formation in the multi-layer circular objects are related with its surface irregularity such as convexity, concavity and roundness of inner and outer layers. The simulation of dose distributions in multi-layer tubes irradiated with a scanned electron beam (EB) was carried out by Monte Carlo (MC) method with utilization of the software ModeCEB. The effects of mutual influence on dose field formation in contacting multi-layers tubes irradiated with EB were MC simulated and measured with a film dosimetry. An experimental validation of the obtained simulation predictions for dose distributions in multi-layer tubes irradiated with 10MeV electrons was performed on radiation facility with linear electron accelerator LAE 13/9, INCT, Warsaw. Comparison of MC simulation results with a film dosimetry is discussed in the report.

      KEY WORDS: Multi-layer circular objects; Monte Carlo simulation; Film dosimetry.

    • V.T. Lazurik, S.A. Pismenesky, G. F. Popov, D.V. Rudychev, V.G. Rudychev.
      An increase of utilization efficiency of X-ray beam.
      Radiation Physics and Chemistry. Vol. 76, Issue 11-12, P. 1815-1819, 2007.
    • Abstract. The features of absorbed dose field formation in objects irradiated with scanned X-ray beams at double - and four-sided irradiation were investigated both analytically and by Monte Carlo methods. An analytical approach uses an angular/spectrum X-ray characteristics calculated with PENELOPE, JEANT 4 and ModeXR codes. It was shown that the special angular orientation of electron beam incidence on the X-ray converter leads to X-ray dose smoothing on the surface of the irradiated object. At the same time, a double-sided irradiation can provide high X-ray beam efficiency at dose uniformity ration (DUR) o1.5 for sizeable object thickness. At four-sided irradiation, the angular orientation of electron beam incidence on the X-ray converter should be changed so as to focus the electrons to the center of the converter. At this mode X-ray beam efficiency is more than 60%.

      KEY WORDS: X-ray beam; Simulation methods; Utilization efficiency.

    • V. T.Lazurik, V. M. Lazurik, G. F. Popov, Y. V.Rogov.
      Integration of computation methods in dosimetry of radiation processing. Problems of atomic science and technology. 2008.- Series: Nuclear Physics Investigation N3(49), p. 201-205.
    • Abstract. Radiation processing dosimetry is vitally important for all radiation-technological processes based on electron beam (EB) irradiators. In this report a development of software for modeling with Monte Carlo method the dosimetric devices such as dosimetric wedge and stack irradiated with scanned EB on moving conveyer is presented. Software ModeDW is intended for modelling an EB dose distribution in dosimetric film placed along the sloping surface between the two wedges made of a reference materials. Software ModeStEB is intended for modelling an EB dose distribution in a stack of plates of a suitable reference materials interleaved with dosimetric films or a stack of dosimetric film alone.

      Modeling of 3-dimensional EB dose distribution in a wedge and a stack and direct modeling of the devices movement on a conveyer are the features of calculation schemes of the software. The programs allow to determine a dose map in an irradiated reference materials, a dose uniformity ratio, an energy of incident electrons, an EB ranges, prediction and analysis of EB absorbed dose characteristics related with parameters of EB radiation facility, as well as an interpretation of experimental dosimetry results. In the field of EB radiation processing the programs can be used for commissioning of EB facility, EB facility qualification, process validation and routine process control.

    • V. T.Lazurik, V. M. Lazurik, G. Popov, Y. Rogov, I. Kaluska, Z. Zimek.
      Integration of computation methods into radiation sterilization process.
      Journal of Kharkiv National University, physical series "Nuclei, Particles, Fields", No. 832, Issue 4/40, p.77-82, 2008.
    • Authors have developed the computer technology for simulation of practical tasks in radiation sterilization process in accordance with Method 1, Standard ISO 11137 and IAEA Code of Practice. The technology was realized on the base of the RT-Office modules for modeling by Monte Carlo method of an absorbed dose in an irradiated heterogeneous targets with electron beam (EB), X-ray and gamma-ray and specialized software ModeSAL. The software ModeSAL was used for simulation and comparative analysis of a sterility assurance level (SAL) and a sterilizing dose for bioburden to achieve a required SAL in an irradiated product. The mathematical approach of the technology is based on the detailed and precise consideration of a self-consistent physical and geometrical models of calculation an EB, X-ray and gamma-ray dose maps in an irradiated product, a SAL, a sterilizing dose and the spatial and time uncertainties for dose provided to an irradiated product. The analysis of interrelations between parameters of EB radiation facility and values of a SAL and a sterilizing dose are considered.

      KEY WORDS: radiation sterilization, Standard ISO 11137, RT-Office, software ModeSAL, dose map

    • I. Kaluska, V. T.Lazurik, V. M. Lazurik, G. F. Popov, Y. V.Rogov, Z. Zimek.
      Dose field formation in thin films irradiated by electron beams: Comparison of Monte Carlo simulation predictions with dosimetry.
      Journal of Kharkiv National University, physical series "Nuclei, Particles, Fields", No. 868, Issue 3, p.4-10, 2009.
    • Abstract. The simulation of the absorbed dose distribution into thin films with different thickness inserted between flat boundaries of two homogeneous materials as well as the absorbed dose distribution near to boundaries of these materials irradiated with a scanned electron beam were fulfilled. Films inserted in multi-layer targets were parallel orientated with an incident electron beam (EB). The simulation was performed by the Monte Carlo (MC) method with utilization of the software ModePEB which was designed for predictions of a dose distribution in heterogeneous targets irradiated by EB with the electron energy range from 0.1 to 25 MeV.

    • I. Kaluska, V. T.Lazurik, V. M. Lazurik, G. F. Popov, Y. V.Rogov, Z. Zimek. Experimental benchmarking of software ModeStEB for simulation electron beam processing.
      Journal of Kharkiv National University, physical series "Nuclei, Particles, Fields", No. 887, Issue 1/45, p.123-129, 2010.
    • Abstract. Introduction success of radiation technologies into practice substantially depends on development of computational dosimetry which is based on accurate and validated programs, capable effectively calculate absorbed dose in processes of an irradiation. The simulation of the absorbed dose distributions into thin polyvinylchloride dosimetric films located in the stack of plates of a reference materials irradiated with a scanned electron beam was performed. Modeling of electron beam dose distributions in the multi-layer packages was accomplished using the Monte Carlo method in a three-dimensional geometrical model with utilization of the software ModeStEB.

      Results of benchmarking experiment for the software ModeStEB, which is used for simulation of industrial electron beam processing, are considered.

    • I. Kaluska, V. T.Lazurik, V. M. Lazurik, G. F. Popov, Y. V.Rogov, Z. Zimek.
      Influence of boundary effects on electron beam dose distribution formation in multilayer targets. Nukleonika.
      Journal of the Institute of Nuclear Chemistry and Technology, Warsaw, Poland. 2010. Vol. 55(3) P. 363?368.
    • Abstract. Investigation of boundary anomalies for an absorbed dose of an electron beam (EB) in multi-layer targets was carried out both by computer simulation and with film dosimetry. Multi-layer target in form of stack consists of a set of plates interleaved with dosimetric films with packing box was irradiated with scanned 10 MeV EB on moving conveyer. Simulation of EB dose distributions in the stack plates was accomplished by the Monte Carlo (MC) method in a tree-dimensional (3-D) geometrical model with the utilization of the software ModeStEB. It was observed that boundary anomalies for an absorbed dose appear near the interface of contacting plates with different densities and/or atomic number and near the interface of plates with packing box. These anomalies essentially influence on dose uniformity ratio of electrons in an irradiated target.

      KEY WORDS: absorbed dose, electron beam, simulation, Monte Carlo, software ModeStEB, dosimetry

    • Lazurik V.T., Lazurik V.M., Popov G., Rogov Yu.
      Simulation of dose mapping in a multi product palletized X-ray facility using Monte Carlo method.
      Journal of Kherson Technical University. №3(42). 2011. - P.497-502.
    • Abstract. Utilization of high-power electron beam accelerators for generation of X-rays (bremsstrahlung) represents the large commercial interest in the area of industrial radiation technologies. Success of application of X-ray beams in radiation processing depends largely on development of theoretical notions, semi-empirical models and computer codes for simulation of irradiation processes based on X-ray radiation facility. The results of the computer simulation using Monte Carlo method of the absorbed dose mapping in the products irradiated with scanned X-ray beams are discussed in the report.

    • V.T. Lazurik, V.M. Lazurik, G.F. Popov, Yu. Rogov.
      Modeling of processes of an irradiation for industrial radiation technologies.
      Journal of Kharkiv University. Series "Mathematical Modelling. Information Technology. Automated Control Systems" – 2011.- N.960, Issue 16. - P.177-194.
    • Abstract. Today, the industrial radiation technologies represent the systems with high integration of scientific and technical solutions from various data domains of production activity of a society. Success of the use of ionizing radiation in various radiation technologies depends largely on development of mathematical models and computer codes for simulation of irradiation processing on radiation facility. The features of modeling methods of complicated variants of an irradiation by electrons and photons beams of heterogeneous objects in industrial radiation technologies are considered in the report.

    • Lazurik V.T., Lazurik V.M., Popov G., Rogov Yu., Sarukhanian G.
      Comparison of product irradiation technology on industrial X-ray radiation facility.
      Problems of atomic science and technology. Series: Nuclear Physics Investigations, N4, 2012, p.216-220.
    • The comparison of various technologies of product irradiation with X-rays (bremsstrahlung) that is generated by industrial high-power electron beam accelerators is presented in the report. Computer modeling method was used for calculation the 3 dimensional absorbed dose distributions in the product containers on moving conveyor irradiated with scanned X-ray beams. The comparison of dose uniformity ratio and the part of X-ray beam use in the irradiated product was performed for various technologies of product irradiation with X-ray. The variants of product containers movement in front of X-ray converter in the range from 2 to 8 passes at different levels were considered. The results of Monte Carlo simulation method of the absorbed dose mapping of X-ray in the products and comparison of irradiation technologies for product with various density are discussed in the report.

    • Boshnakova, N., Lazurik V.T., Lazurik V.M., Popov G., Rogov Yu.
      Dose mapping of a gamma industrial radiation facility using a practical and computational dosimetry.
      Journal of Kharkiv National University, physical series "Nuclei, Particles, Fields", No. 1001, Issue 2/54, p.69-75, 2012.
    • Abstract. Comparison results for absorbed dose mapping of the Co60 industrial radiation facility BULGAMMA of Sopharma PLC, Bulgaria using a practical and computational dosimetry are presented in the paper. The gamma radiation facility is based on JS-8500 Co60 irradiator produced by MDS Nordian, Canada. The absorbed dose distributions of gamma rays in an irradiated product on JS-8500 Co60 irradiator have been calculated using the ModeGR Monte Carlo software. The software ModeGR was designed specially for simulation of the absorbed dose distribution within multi-layer packages irradiated with gamma ray from flat panoramic 60Co source rack using a Monte Carlo method. Absorbed dose measurements into containers filled with material using Ethanol Chlorobenzene chemical dosimeters were carried out to validate the software ModeGR. The comparison results show that software ModeGR can be used as a predictive tool for detailed dose mapping in gamma irradiated product.

      KEY WORDS: computational dosimetry, software ModeGR, Monte Carlo method, absorbed dose mapping, industrial gamma facility.

    • Lazurik V.T., Lazurik V.M., Popov G., Rogov Yu., Sarukhanian G.
      Integration of computational methods in spectrometry of electron beams.
      Journal of Kharkiv National University, physical series "Nuclei, Particles, Fields", No. 10017, Issue 3/55, p.90-94, 2012.
    • Abstract. Investigations related with developments of computer simulation and computational methods for spectrometry of sources irradiation are actual for decision of wide class of scientific tasks into industrial radiation processing. Investigations of influence of electron beam spectrum characteristics on the spatial absorbed dose distributions formation into materials with various atomic numbers were performed. Simulation of spatial distributions of electrons absorbed dose in an irradiated targets was accomplished with the Monte Carlo method by the program ModeRTL. Analysis of numerical experiments results are discussed.

      KEY WORDS: computational spectrometry, spectrum electrons, dose distribution, Monte Carlo method, software ModeRTL.

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