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Gamma radiation calculations and gamma blocker design for the high-energy beam transport region of the European Spallation Source

100%

Szymczyk K. S. , Wronka S.

Nukleonika

2021

tom Vol. 66, No. 3

99--102

The purpose of this paper is to present the Monte-Carlo calculations performed to design a special element called gamma blocker (GB), necessary to stop the gamma radiation in the Accelerator-to-Target (A2T) section of European Spallation Source (ESS) linac. Very high levels of gamma radiation emitted backward from the activated target through the beam pipe could effectively block any human intervention close to the beam transport system. The residual dose rate in the linac tunnel was calculated without and with different GBs as a function of time. The fi nal GB material and dimensions are proposed.

Mechanical design of the gamma blockers for the high-energy beam transport region of the European Spallation Source

80%

Wojciechowski M. , Szymczyk K. , Wronka S.

Nukleonika

2023

tom Vol. 68, No. 3

77--80

The European Spallation Source (ESS) is a collaboration of 13 European countries to build the world’s most powerful neutron source for research. The project, situated in the south of Sweden, is approaching the end of the construction phase, and the fi rst scientifi c results are planned for 2023. This paper gives an overview of mechanical design of the gamma blockers (GBs) in the accelerator to target (A2T) and dump line (DmpL) sections. The presence of GBs in the beam line should limit the gamma radiation emitted from the activated tungsten target and beam dump to allow the safe access of the staff to the machine. The presented design allows for effi cient operation and the same shutting time independently of the vacuum status.

Observation of intrapulse energy switching in standing-wave electron linac

80%

Matusiak M. , Kosiński T. , Wronka S. , Zakrzewski T.

2022

tom Vol. 67, No. 3

43--47

For the development of an effective cargo-scanning system, an intrapulse energy switching has been tested at the National Centre for Nuclear Research (NCBJ) with the possibility to change the beam energy within a 4 μs pulse of the linear electron accelerator (linac). Modifi cation of the electron energy is achieved through the beam-loading effect in a standing-wave accelerating structure equipped with a triode gun. Construction of the machine and the achieved results are presented in this article.

Generator mikrofalowy do badań odporności na HPM

41%

Andrasiak M. , Baczewski A. , Bogowicz J. , Chabera M. , Kaźmierczak K. , Klimaszewski J. , Kosiński T. , Łubian A. , Matusiak M. , Misiarz A. , Pracz J. , Rzadkiewicz J. , Wojciechowski M. , Wronka S. , Zakrzewski T.

Przegląd Elektrotechniczny

2021

tom R. 97, nr 3

84--86

W Narodowym Centrum Badań Jądrowych zaprojektowano, zbudowano i uruchomiono impulsowy generator mikrofalowy, który może być wykorzystany do badań wpływu HPM na układy elektroniczne i organizmy żywe oraz do testowania osłon i aktywnych układów zabezpieczających przed HPM. W artykule przedstawiono budowę układu oraz osiągnięte wyniki.

At the National Centre for Nuclear Research, a pulsed microwave generator was designed, built and launched. It can be used to study the impact of HPM on electronic systems and living organisms, as well as to test shields and active protection systems against HPM. The article presents the architecture of the system and the achieved results.

Development of X-ray scanning system Sowa

41%

Bogowicz J. , Chabera M. , Dziewiecki W. , Kaźmierczak K. , Klimaszewski J. , Kosiński T. , Łubian A. , Matusiak M. , Wasilewski A. , Wojciechowski M. , Wronka S. , Zakrzewski T.

2020

tom Vol. 65, No. 4

229--232

The new vehicle scanning system Sowa has been developed in the National Centre for Nuclear Research. This innovative device is equipped with a 300 kV X-ray tube, U-shape imaging detector line, transport system, and fully shielded container. Sowa allows for a detailed inspection of the car and the detection of illegal transported items. This article presents the design, applied solutions, and achieved results of Sowa scanning system.