Julianna Szabó

Julianna Szabó
Hungarian Academy of Sciences | HAS · Radiation Protection Department

Ph.D.

About

37
Publications
3,961
Reads
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404
Citations
Citations since 2017
7 Research Items
176 Citations
20172018201920202021202220230102030
20172018201920202021202220230102030
20172018201920202021202220230102030
20172018201920202021202220230102030
Additional affiliations
January 2001 - present
Hungarian Academy of Sciences
Position
  • Research Associate

Publications

Publications (37)
Article
In this article, two etched track detector methods for measuring short-range particles are presented and compared. The primary method employs observations of the evolution of the track geometry in intermittent etching, with the use of the appropriate track scanning procedures. The alternative method requires one-step etching and a specific analysis...
Article
The evaluation of different components of secondary radiation (charged fragments and neutrons) onboard ISS is described. Solid-state nuclear track detectors CR-39™ were applied for the measurements of short-range nuclear fragments, while the measurements of neutrons were carried out by means of thermo-luminescent dosimeters with various concentrati...
Article
One of the limiting factors of an astronaut's career is the dose received from space radiation. High energy protons, being the main components of the complex radiation field present on a spacecraft, give a significant contribution to the dose. To investigate the behavior of solid state nuclear track detectors (SSNTDs) if they are irradiated by such...
Article
The Phoenix space experiment started in 2014 with the purpose of investigating the impact of space radiation on genetic properties and survival of biological samples exposed on-board the International Space Station. In the on-going project absorbed dose rates are measured in the direct vicinity of the samples in three different modules of the Russi...
Article
Full-text available
The natural radiation environment in Low Earth Orbit (LEO) differs significantly in composition and energy from that found on Earth. The space radiation field consists of high energetic protons and heavier ions from Galactic Cosmic Radiation (GCR), as well as of protons and electrons trapped in the Earth’s radiation belts (Van Allen belts). Protons...
Article
The Russian Foton spacecraft was designed to deliver scientific experiments to low Earth orbit and return them safely to the ground for further analysis. During the 44-day Foton-M4 satellite mission in 2014 several passive cosmic ray detectors were exposed outside (in a single holder) and inside (in 4 locations) the recoverable capsule to study the...
Article
The preliminary results of the 1st session of Russian "PHOENIX" long-term space experiment are presented. The survival of dried human lymphocytes and mouse bone marrow cells in 199 days space flight is studied. The degree of DNA fragmentation is analysed for samples flown in different ISS compartments. It is shown that biological data correlates wi...
Article
Full-text available
The radiation environment encountered in space differs in nature from that on Earth, consisting mostly of highly energetic ions from protons up to iron, resulting in radiation levels far exceeding the ones present on Earth for occupational radiation workers. Since the beginning of the space era, the radiation exposure during space missions has been...
Poster
Full-text available
The Hungarian Academy of Sciences, Centre for Energy Research has been participating in the investigation of the impact of space radiation on genetic properties of cell production (the BioTrack Project) since 2010 in co-operation with the Russian Academy of Sciences, Institute for Biomedical Problems. The aim of our work is to determine the level o...
Presentation
The Russian Foton spacecraft was designed to deliver scientific experiments to low Earth orbit and return them safely to the ground for further analysis. The original programme started in 1985 and continues even today, as the vehicle has attracted considerable attention among the Western customers, as well. Since the 1990’s the European Space Agenc...
Presentation
The DOSIS-3D project is a follow up experiment of the DOSIS measurement (2009-2011) in the Columbus module of the International Space Station (ISS), with the aim of obtaining 3 dimensional dose distribution information at different locations and shielding conditions using active and passive detector systems. Since 2012 six successful phases were co...
Conference Paper
In the past years passive detector packages were developed in the Centre for Energy Research in Hungary with the aim of detecting cosmic ray particles precisely, without applying any external power supply. These packages consisting of thermoluminescent- (TL) and solid state nuclear track detectors (SSNTD) were located in several positions inside an...
Presentation
BION-M1 and Foton-M2 & M3 satellites provided possibility to perform different biological experiments within low gravity. Each satellite had exposure platform also at the outer surface of the recoverable capsule which permits exposure of biological samples to the open space environment. To support the biological studies each satellite was equipped...
Presentation
A passive detector package was developed in the past years in the Centre for Energy Research, Hungarian Academy of Science to detect cosmic ray particles, to determine their flux and dose. It consists of thermoluminescent detectors (TLD) and plastic solid state nuclear track detectors (SSNTD). In the frame of a scientific co-operation between the I...
Article
The MATROSHKA experiments and the related HAMLET project funded by the European Commission aimed to study the dose burden of the crew working on the International Space Station (ISS). During these experiments a human phantom equipped with several thousands of radiation detectors was exposed to cosmic rays inside and outside the ISS. Besides the mea...
Article
The career of astronauts is dependent mostly on the lifetime dose received from primary cosmic rays and secondary particles generated within the structuring materials of a space craft. Since the high energy protons and He particles have the highest abundance and the secondary neutrons significantly contribute to the dose, the study of the response...
Article
Full-text available
Space radiation hazards are recognized as a key concern for human space flight. For long-term interplanetary missions, they constitute a potentially limiting factor since current protection limits for low-Earth orbit missions may be approached or even exceeded. In such a situation, an accurate risk assessment requires knowledge of equivalent doses...
Article
Space radiation hazards are recognized as a key concern for human space flight. For long-term interplanetary missions, they constitute a potentially limiting factor since current protection limits for low-Earth orbit missions may be approached or even exceeded. In such a situation, an accurate risk assessment requires knowledge of equivalent doses...
Article
In the frame of the European Space Agency (ESA) project called “Biology and Physics in Space”, the returning satellite, Foton-M2, carried an open-to-space exposure platform outside of the satellite body, called as BIOPAN-5, loaded with exo-biological experiments and facilities for radiation dosimetry (RADO). One of the RADO experiments was dedicate...
Article
The Russian BRADOS experiment onboard the International Space Station (ISS) was aimed at developing methods in radiation dosimetry and radiobiology to improve the reliability of risk estimates for the radiation environment in low-Earth orbit. Experimental data from thermoluminescence detectors (TLDs) and solid state nuclear track detectors (SSNTDs)...
Article
The complex radiation field inside the International Space Station (ISS) as well as the dose received by its crew was studied for several years in the BRADOS (1-5) projects organized by the Institute for Biomedical Problems (IBMP, Moscow) with the participation of different laboratories. The results of the measurements performed during the BRADOS-5...
Article
The BIOPAN-6 loaded with exo-biological experiments was constructed as a multi-purpose facility and mounted on the outer surface of an un-manned Foton spacecraft. This platform was opened to expose its contents directly to the space environment in low-earth orbit (LEO) for ten days. As part of the European Space Agency (ESA) BIOPAN-6 mission we par...
Article
In the frame of a European Space Agency (ESA) project called ‘Biology and Physics in Space’, a returning satellite, Foton-M2, was orbiting a container, the BIOPAN-5, loaded with biological experiments and facilities for radiation dosimetry (RADO) in the open space. One of the RADO experiments was dedicated to the detection of the primary cosmic ray...
Article
The radiation field onboard the International Space Station (ISS) is a mixture of particles of different type and energy and varies considerably with time, altitude and other orbital parameters. The biological effectiveness of the radiation can be characterized by the dose equivalent which takes into account the absorbed energy and the radiation qu...
Article
Full-text available
To study the radiation environment inside the International Space Station, solid state nuclear track detector stacks were used. Within the BRADOS experiments, Phase 1, seven stacks were exposed at different locations of the Russian segment 'Zvezda' for 248 days in 2001. It was supposed that the radiation field inside the ISS was composed from prima...
Article
Complex (multiple) etched tracks are analysed through digitised images and 3D simulation by a purpose-built algorithm. From a binary track image an unfolding procedure is followed to generate a 3D track model, from which several track parameters are estimated. The method presented here allows the deposited energy, that originated from particle frag...
Article
Low dose cell culture irradiation experiments have been carried out at the filtered beam of Budapest Research Reactor for several years. The aim of the present study is to provide along with the macroscopically determinable “dose”, more detailed information on the components of the radiation affecting the cells. For this purpose CR-39 detectors wit...
Article
The BRADOS 1–3 projects were organised by the Russian Space Agency (RZA) between 2001 and 2003. The aim was to study the contribution of the primary galactic cosmic rays and of the secondary particles to the dose received by the crew of the International Space Station (ISS). Several laboratories participated in these experiments. Two different stac...
Article
The aim of the study was to investigate the contribution of secondary neutrons to the total dose inside the International Space Station (ISS). For this purpose solid-state nuclear track detector (SSNTD) stacks were used. Each stack consisted of three CR-39 sheets. The first and second sheets were separated by a Ti plate, and the second and third sh...
Article
The risk to human health of exposure to low-level radiation is not precisely known yet. One way of studying this is to carry out in vitro biological experiments with cell cultures and to extend the conclusions to biological models. To relate the macroscopically deteminable 'low dose' to the damage of cells caused by a certain type of ionising parti...
Article
One way of studying the risk to human health of low-level radiation exposure is to make biological experiments on living cell cultures. Two 210Po alpha-particle emitting devices, with 0.5 and 100 MBq activity, were designed and constructed to perform such experiments irradiating monolayers of cells. Estimates of dose rate at the cell surface were o...
Article
Full-text available
The aim of the study was to investigate the contribution of secondary particles (mainly neutrons) in producing radiation damage to electronic devices and to astronaut-dose onboard of the International Space Station (ISS). Especially: • To optimize solid state nuclear track detector (SSNTD) assemblies, have been used earlier for neutron dosimetry ar...

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Project (1)
Project
The radiation exposure is one of the main limiting factors of long duration human space travel. Since the cosmic radiation environment consists of different types of particles covering a wide range of energy and biological effectiveness, it is necessary to apply a measurement system which is able to differentiate these components in order to design the most effective shielding. We use a combined detector set comprising of thermoluminescent dosimeters and solid state nuclear track detectors on-board the International Space Station and recoverable satellites to monitor the spatial and temporal changes of the radiation field.