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1
Content available Aktualne kierunki rozwoju technologii radiacyjnych – podsumowanie konferencji ICARST 2022
Walo Marta, Gryczka Urszula, Rzepna Magdalena, Chmielewska-Śmietanko Dagmara
Postępy Techniki Jądrowej
|
2022
|
z. 3
2--7
PL
Trwająca przez ponad dwa lata pandemia COVID-19 znacząco wpłynęła na współpracę środowiska naukowego, ograniczając kontakty wyłącznie do spotkań online, pomimo realizowania nieprzerwanie przez wiele centrów naukowych prac badawczych. Konferencja Second International Conference on Applications of Radiation Science and Technology (ICARST), która odbyła się w dniach 22-26 sierpnia 2022 r. w Wiedniu, organizowana jako jedna z pierwszych po pandemii w formie hybrydowej cieszyła się ogromnym zainteresowaniem. Naukowcy z całego świata prezentowali najnowsze osiągnięcia z zakresu wykorzystania akceleratorów, źródeł promieniowania γ, radioznaczników i promieniowania rentgenowskiego w badaniach i zastosowaniach przemysłowych. W niniejszej pracy przedstawiono aktualne kierunki rozwoju technologii radiacyjnych na podstawie doniesień prezentowanych podczas konferencji ICARST.
EN
The COVID-19 pandemic, which lasted for over two years, significantly influenced the cooperation of the scientific community, limiting contacts only to online meetings, despite the fact that many research centers carry out research work continuously. The Second International Conference on Applications of Radiation Science and Technology (ICARST), which took place on August 22-26, 2022 in Vienna, was one of the first after the pandemic in a hybrid form, which attracted great interest. Scientists from around the world presented the latest achievements in the use of accelerators, γ radiation sources, radiotracers and X-rays in research and industrial applications. This paper presents the current trends in the development of radiation technologies based on reports presented at the ICARST conference.
2
Content available Design Study on Electron Energy Spread Effect on Performance of Linac Irradiation Facility with the Aid of Electron Energy Spectrum Online Analyzer
Bułka S., Zimek Z.
International Journal of Electronics and Telecommunications
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2022
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Vol. 68, No. 1
103--108
EN
Ongoing energy measurement is one of the parameters such as: electron beam current, transporter speed, or scanning width, that must be recorded according to the conditions imposed in the accelerator validation procedure. Described measurement method based on the use of a secondary electron collecting electrode has been tested at the electron beam linear accelerator installation typically used for radiation sterilization. Data processing and presentation of the electron beam characteristics is based on the information obtained via dedicated pulse acquisition interface. The energy spectra parameters provide data for modeling and calculation of dose distribution for irradiation process optimization and also knowledge of accelerator RF alignment in case of service.
3
Zastosowanie formatu wymiany danych JSON pomiędzy podzespołami liniowego akceleratora elektronów
Andrasiak Michał, Misiarz Agnieszka, Andrasiak Mikołaj
Elektronika : konstrukcje, technologie, zastosowania
|
2020
|
Vol. 61, nr 11
21--24
PL
W pracy przedstawiono kilka przypadków wykorzystujących format wymiany danych bazujących na JSON (JavaScript Object Notation), odnosząc je do formatu wymiany danych MODBUS przy opracowywaniu oprogramowania zarządzającego i sterującego pracą akceleratora elektronów. Akceleratory elektronów produkowane przez Zakład Aparatury Jądrowej Narodowego Centrum Badań Jądrowych wymagają wymiany danych pomiędzy poszczególnymi podzespołami wykorzystującymi 8 bitowe mikroprocesory, procesory ARM oraz PC. Przyjęcie korzystnego formatu wymiany danych jest krytyczne dla tworzenia oprogramowania i zarządzania pracą zespołu programistów.
EN
The paper presents several cases using the JSON (JavaScript Object Notation) data exchange format, relating them to the MODBUS data exchange format in the development of software for managing and controlling the operation of the electron accelerator. Electron accelerators made in ZdAJ require data exchange between different modules based on 8bit microprocessors, ARM processors and PC. Using proper data format is critical to software development and the management of the development team.
4
Content available Akcelerator Intraline-IOERT do radioterapii śródoperacyjnej
Pracz J., Syntfeld-Każuch A.
Postępy Techniki Jądrowej
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2017
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z. 3
21--28
PL
Artykuł przedstawia opracowany w Narodowym Centrum Badań Jądrowych we współpracy z Wielkopolskim Centrum Onkologii mobilny akcelerator IntraLine-IOERT, który jest przeznaczony do napromieniania podczas wykonywanych w salach operacyjnych zabiegów chirurgicznych. Akcelerator generuje terapeutyczną wiązkę elektronów o energii od 4 do 12 MeV, którą można wykonywać napromienianie pól o średnicy od 3 do 10 cm poprzez zastosowanie odpowiednich aplikatorów. Konstrukcja akceleratora zapewnia pełną mobilność całego akceleratora, a w szczególności jego głowicy, co pozwala na wyprowadzenie wiązki elektronów pod różnymi kątami zależnie od położenia komórek nowotworowych w ciele pacjenta.
EN
In the article the mobile electron accelerator IntraLine-IOERT developed by National Centre of Nuclear Research in cooperation with The Greater Poland Cancer Centre is presented. The unit is designed for use during surgical procedures in an operating room (Intraoperative Electron Radiation Therapy). The device generates therapeutic electron beam with the energy from 4 MeV to 12 MeV and it allows to irradiate fields of the diameter from 3 to 10 cm using a suitable applicator. IntraLine-IOERT accelerator is a fully mobile device; especially its mobile head allows for easy application of the electron beam under different angels as required by the tumor location in a patient’s body.
5
Content available Electron beam treatment of simulated marine diesel exhaust gases
Licki J., Pawelec A., Zimek Z., Witman-Zając S.
Nukleonika
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2015
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Vol. 60, No. 3, part 2
689--695
EN
The exhaust gases from marine diesel engines contain high SO2 and NOx concentration. The applicability of the electron beam flue gas treatment technology for purification of marine diesel exhaust gases containing high SO2 and NOx concentration gases was the main goal of this paper. The study was performed in the laboratory plant with NOx concentration up to 1700 ppmv and SO2 concentration up to 1000 ppmv. Such high NOx and SO2 concentrations were observed in the exhaust gases from marine high-power diesel engines fuelled with different heavy fuel oils. In the first part of study the simulated exhaust gases were irradiated by the electron beam from accelerator. The simultaneous removal of SO2 and NOx were obtained and their removal efficiencies strongly depend on irradiation dose and inlet NOx concentration. For NOx concentrations above 800 ppmv low removal efficiencies were obtained even if applied high doses. In the second part of study the irradiated gases were directed to the seawater scrubber for further purification. The scrubbing process enhances removal efficiencies of both pollutants. The SO2 removal efficiencies above 98.5% were obtained with irradiation dose greater than 5.3 kGy. For inlet NOx concentrations of 1700 ppmv the NOx removal efficiency about 51% was obtained with dose greater than 8.8 kGy. Methods for further increase of NOx removal efficiency are presented in the paper.
6
Content available Development of the technique embedded into a Monte Carlo transport system for calculation of photonuclear isotope yield
Nikiforov V. I., Uvarov V. L.
Nukleonika
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2012
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Vol. 57, No. 1
75-80
EN
The paper describes two methods that use Monte Carlo transport code for computing the photonuclear isotope yield for arbitrary target activation conditions. One of them is based on a direct simulation of new nuclei generation events (DSE method). The other one involves a step-by-step calculation of isotope microyield along the photon trajectories (SBSM method). The techniques have been realized in the computer codes using the PENELOPE package of 2001, 2006 and 2008 versions. The program benchmarking was performed using experimental data on the activity distributions of 67Cu isotope produced in the 68Zn(gamma,p)67Cu reaction in thick zinc targets. Both approaches have shown to give similar results at an appreciably greater speed of the SBSM method. The results of simulation based on the PENELOPE 2006 and 2008 codes are in excellent agreement with all experimental data. At the same time, the PENELOPE 2001 computations give good agreement with the experimental results for target activation by the electron beam, but in the case of target exposed to bremsstrahlung systematic underestimation of about 15% has been observed.
7
Content available Electron beam flue gas treatment process for purification of exhaust gases with high SO2 concentrations
Chmielewski A. G., Licki J.
Nukleonika
|
2008
|
Vol. 53, suppl. 2
61--66
EN
Exhaust gases with high SO2 concentrations are emitted from combustion of high sulphur fossil fuels and from different industrial processes (e.g. copper smelter and sintering plants). The application of the electron beam process for SO2 and NOx removal from such flue gases was investigated. A parametric study was carried out to determine the SO2 and NOx removal efficiency as a function of temperature and humidity of irradiated gases, absorbed dose and ammonia stoichiometry. The efficiency 90–95% of SO2 removal was obtained in the optimal treatment conditions with an inlet SO2 concentration of up to 15% vol. The synergistic effect of high SO2 content on NOx removal was indicated. The collected by-product was a mixture of ammonium sulphate and nitrate. The content of heavy metals in the by- -products was many times lower than the values accepted for commercial fertilizers.
8
Content available Application of ionizing radiation to environment protection
Chmielewski A.
Nukleonika
|
2005
|
Vol. 50,suppl.3
17-24
EN
Radiation technology may contribute to the environmental protection to a great extent. Electron beam industrial installations for flue gases containing SOx and NOx treatment have been already built in China and Poland. The same technology for high sulphur and high humidity off-gases (low quality lignite) has been successfully tested in an industrial pilot plant in Bulgaria. Pilot plant tests performed in Japan have illustrated that by applying electron beam for municipal waste incinerator off-gases treatment the concentration of dioxins can be reduced by 80%, other persistent organic pollutants can be depredated as well. The positive results of electron beam wastewater treatment are the basis for a full-scale industrial plant being built in the South Korea. A pilot gamma plant for sludge irradiation producing a high grade organic fertilizer is in operation in India. All these achievements are reported in this paper.
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