N. Golnik - Academia.edu (original) (raw)
Papers by N. Golnik
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1998
ABSTRACT The performance of the IEA dose equivalent meter based on the REM-2 recombination chambe... more ABSTRACT The performance of the IEA dose equivalent meter based on the REM-2 recombination chamber was tested in pulsed high energy radiation field at CERN-EC calibration facility. The device was working with its own monitoring circuit, and provided accurate and stable results, within 2% of statistical uncertainty.
The paper presents a practical study of several methods of image analysis applied to polarimetric... more The paper presents a practical study of several methods of image analysis applied to polarimetric images of regular and malignant human tissues. The images of physiological and pathologically changed tissues from body and cervix of uterus, intestine, kidneys and breast were recorded in transmitted light of different polarization state. The set up of the conventional optical microscope with CCD camera and rotating polarizer's were used for analysis of the polarization state of the light transmitted through the tissue slice for each pixel of the camera image. The set of images corresponding to the different coefficients of the Stockes vectors, a 3x3 subset of the Mueller matrix as well as the maps of the magnitude and in-plane direction of the birefringent components in the sample were calculated. Then, the statistical analysis and the Fourier transform as well as the autocorrelation methods were used to analyze spatial distribution of birefringent elements in the tissue samples. For better recognition of tissue state we proposed a novel method that takes advantage of multiscale image data decomposition The results were used for selection of the optical characteristics with significantly different values for regular and malignant tissues
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2014
In the framework of the EURADOS working group 11, an intercomparison of active neutron survey met... more In the framework of the EURADOS working group 11, an intercomparison of active neutron survey meters was performed in a pulsed neutron field (PNF). The aim of the exercise was to evaluate the performances of various neutron instruments, including commercially available rem-counters, personal dosemeters and instrument prototypes. The measurements took place at the cyclotron of the Helmholtz-Zentrum Berlin für Materialien und Energie GmbH. The cyclotron is routinely used for proton therapy of ocular tumours, but an experimental area is also available. For the therapy the machine accelerates protons to 68 MeV. The interaction of the proton beam with a thick tungsten target produces a neutron field with energy up to about 60 MeV. One interesting feature of the cyclotron is that the beam can be delivered in bursts, with the possibility to modify in a simple and flexible way the burst length and the ion current. Through this possibility one can obtain radiation bursts of variable duration and intensity. All instruments were placed in a reference position and irradiated with neutrons delivered in bursts of different intensity. The analysis of the instrument response as a function of the burst charge (the total electric charge of the protons in the burst shot onto the tungsten target) permitted to assess for each device the dose underestimation due to the time structure of the radiation field. The personal neutron dosemeters were exposed on a standard PMMA slab phantom and the response linearity was evaluated.
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013, 2013
ABSTRACT The paper describes a number of research projects of the Faculty of Mechatronics of Wars... more ABSTRACT The paper describes a number of research projects of the Faculty of Mechatronics of Warsaw University of Technology in order to illustrate the use of common mechatronics and optomechatronics approach in solving multidisciplinary technical problems. Projects on sensors development, measurement and industrial control systems, multimodal data capture and advance systems for monitoring and diagnostics of industrial processes are presented and discussed.
Radiation Protection Dosimetry, 2004
The stray radiation field outside the shielding of high-energy accelerators comprises neutrons, p... more The stray radiation field outside the shielding of high-energy accelerators comprises neutrons, photons and charged particles with a wide range of energies. Often, accelerators operate by accelerating and ejecting short pulses of particles, creating an analogue, pulsed radiation field. The pulses can be as short as 10 micros with high instantaneous fluence rates and dose rates. Measurements of average dose equivalent (rate) for radiation protection purposes in these fields present a challenge for instrumentation. The performance of three instruments (i.e. a recombination chamber, the Sievert Instrument and a HANDI-TEPC) measuring total dose equivalent is compared in a high-energy reference radiation field (CERF) and a strongly pulsed, high-energy radiation field at the CERN proton synchrotron (PS).
Radiation Protection Dosimetry, 2007
A combination of the recombination principle of H(10) measurements with the use of the ionisation... more A combination of the recombination principle of H(10) measurements with the use of the ionisation chambers containing boron has been presented, in order to increase the relative sensitivity of the chamber to neutrons by a factor close to the radiation quality factor of photoneutrons. Three types of the chambers were investigated. Two of them were filled with BF(3) and the third one contained electrodes covered with B(4)C. All the chambers were placed in paraffin moderators. The response of the chambers was investigated, depending on gas pressure and polarising voltage. The results showed that it was possible to obtain nearly the same response of the chamber to H(10) for photons and neutrons in a restricted energy range; however, further investigations are needed to make an optimum design.
Radiation Measurements, 2009
The European Commission has funded within its 6th Framework Programme a three-year project (2005)... more The European Commission has funded within its 6th Framework Programme a three-year project (2005)(2006)(2007) called CONRAD, COordinated Network for RAdiation Dosimetry. A major task of the CONRAD Work Package ''complex mixed radiation fields at workplaces'' was to organise a benchmark exercise in a workplace field at a high-energy particle accelerator where neutrons are the dominant radiation component. The CONRAD benchmark exercise took place at the Gesellschaft fü r Schwerionenforschung mbH (GSI) in Darmstadt, Germany in July 2006. In this paper, the results of the spectrometry using four extended -range Bonner sphere spectrometers of four different institutes are reported. Outside Cave A the neutron spectra were measured with three spectrometers at six selected positions and ambient dose equivalent values were derived for use in the intercomparison with other area monitors and dosemeters. At a common position all three spectrometers were used to allow a direct comparison of their results which acts as an internal quality assurance. The comparison of the neutron spectra measured by the different groups shows very good agreement. A detailed analysis presents some differences between the shapes of the spectra and possible sources of these differences are discussed. However, the ability of Bonner sphere spectrometers to provide reliable integral quantities like fluence and ambient dose equivalent is well demonstrated in this exercise. The fluence and dose results derived by the three groups agree very well within the given uncertainties, not only with respect to the total energy region present in this environment but also for selected energy regions which contribute in certain strength to the total values. In addition to the positions outside Cave A one spectrometer was used to measure the neutron spectrum at one position in the entry maze of Cave A. In this case a comparison was possible to earlier measurements.
… of Seventh Symposium …, 1981
... Article. Report number, CERN-HS-RP-052-CF. Title, Definition of radiation quality by initial ... more ... Article. Report number, CERN-HS-RP-052-CF. Title, Definition of radiation quality by initial recombination of ions. Author(s), Zielczynski, M ; Golnik, N ; Makarewicz, M ; Sullivan, AH. Affiliation, (Inst. Nucl. Res. Swierk) ; (CERN). Imprint, 14 Aug 1980. - 11 p. ...
Radiation Protection Dosimetry, 1999
Ambient dose equivalent was determined in high energy reference radiation fields at CERN (CERF fa... more Ambient dose equivalent was determined in high energy reference radiation fields at CERN (CERF facility) using a recombination chamber and recombination methods developed in IAE. The chamber was also used for measuring the low LET background radiation which locally accompanies the fields at CERF. The measurements included determination of the absorbed dose and recombination index of radiation quality at different beam intensities. It was shown that the background might considerably influence the measurements of the absorbed dose, however, its influence on the ambient dose equivalent remains important only at low beam intensities.
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1998
ABSTRACT The performance of the IEA dose equivalent meter based on the REM-2 recombination chambe... more ABSTRACT The performance of the IEA dose equivalent meter based on the REM-2 recombination chamber was tested in pulsed high energy radiation field at CERN-EC calibration facility. The device was working with its own monitoring circuit, and provided accurate and stable results, within 2% of statistical uncertainty.
The paper presents a practical study of several methods of image analysis applied to polarimetric... more The paper presents a practical study of several methods of image analysis applied to polarimetric images of regular and malignant human tissues. The images of physiological and pathologically changed tissues from body and cervix of uterus, intestine, kidneys and breast were recorded in transmitted light of different polarization state. The set up of the conventional optical microscope with CCD camera and rotating polarizer's were used for analysis of the polarization state of the light transmitted through the tissue slice for each pixel of the camera image. The set of images corresponding to the different coefficients of the Stockes vectors, a 3x3 subset of the Mueller matrix as well as the maps of the magnitude and in-plane direction of the birefringent components in the sample were calculated. Then, the statistical analysis and the Fourier transform as well as the autocorrelation methods were used to analyze spatial distribution of birefringent elements in the tissue samples. For better recognition of tissue state we proposed a novel method that takes advantage of multiscale image data decomposition The results were used for selection of the optical characteristics with significantly different values for regular and malignant tissues
Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2014
In the framework of the EURADOS working group 11, an intercomparison of active neutron survey met... more In the framework of the EURADOS working group 11, an intercomparison of active neutron survey meters was performed in a pulsed neutron field (PNF). The aim of the exercise was to evaluate the performances of various neutron instruments, including commercially available rem-counters, personal dosemeters and instrument prototypes. The measurements took place at the cyclotron of the Helmholtz-Zentrum Berlin für Materialien und Energie GmbH. The cyclotron is routinely used for proton therapy of ocular tumours, but an experimental area is also available. For the therapy the machine accelerates protons to 68 MeV. The interaction of the proton beam with a thick tungsten target produces a neutron field with energy up to about 60 MeV. One interesting feature of the cyclotron is that the beam can be delivered in bursts, with the possibility to modify in a simple and flexible way the burst length and the ion current. Through this possibility one can obtain radiation bursts of variable duration and intensity. All instruments were placed in a reference position and irradiated with neutrons delivered in bursts of different intensity. The analysis of the instrument response as a function of the burst charge (the total electric charge of the protons in the burst shot onto the tungsten target) permitted to assess for each device the dose underestimation due to the time structure of the radiation field. The personal neutron dosemeters were exposed on a standard PMMA slab phantom and the response linearity was evaluated.
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2013, 2013
ABSTRACT The paper describes a number of research projects of the Faculty of Mechatronics of Wars... more ABSTRACT The paper describes a number of research projects of the Faculty of Mechatronics of Warsaw University of Technology in order to illustrate the use of common mechatronics and optomechatronics approach in solving multidisciplinary technical problems. Projects on sensors development, measurement and industrial control systems, multimodal data capture and advance systems for monitoring and diagnostics of industrial processes are presented and discussed.
Radiation Protection Dosimetry, 2004
The stray radiation field outside the shielding of high-energy accelerators comprises neutrons, p... more The stray radiation field outside the shielding of high-energy accelerators comprises neutrons, photons and charged particles with a wide range of energies. Often, accelerators operate by accelerating and ejecting short pulses of particles, creating an analogue, pulsed radiation field. The pulses can be as short as 10 micros with high instantaneous fluence rates and dose rates. Measurements of average dose equivalent (rate) for radiation protection purposes in these fields present a challenge for instrumentation. The performance of three instruments (i.e. a recombination chamber, the Sievert Instrument and a HANDI-TEPC) measuring total dose equivalent is compared in a high-energy reference radiation field (CERF) and a strongly pulsed, high-energy radiation field at the CERN proton synchrotron (PS).
Radiation Protection Dosimetry, 2007
A combination of the recombination principle of H(10) measurements with the use of the ionisation... more A combination of the recombination principle of H(10) measurements with the use of the ionisation chambers containing boron has been presented, in order to increase the relative sensitivity of the chamber to neutrons by a factor close to the radiation quality factor of photoneutrons. Three types of the chambers were investigated. Two of them were filled with BF(3) and the third one contained electrodes covered with B(4)C. All the chambers were placed in paraffin moderators. The response of the chambers was investigated, depending on gas pressure and polarising voltage. The results showed that it was possible to obtain nearly the same response of the chamber to H(10) for photons and neutrons in a restricted energy range; however, further investigations are needed to make an optimum design.
Radiation Measurements, 2009
The European Commission has funded within its 6th Framework Programme a three-year project (2005)... more The European Commission has funded within its 6th Framework Programme a three-year project (2005)(2006)(2007) called CONRAD, COordinated Network for RAdiation Dosimetry. A major task of the CONRAD Work Package ''complex mixed radiation fields at workplaces'' was to organise a benchmark exercise in a workplace field at a high-energy particle accelerator where neutrons are the dominant radiation component. The CONRAD benchmark exercise took place at the Gesellschaft fü r Schwerionenforschung mbH (GSI) in Darmstadt, Germany in July 2006. In this paper, the results of the spectrometry using four extended -range Bonner sphere spectrometers of four different institutes are reported. Outside Cave A the neutron spectra were measured with three spectrometers at six selected positions and ambient dose equivalent values were derived for use in the intercomparison with other area monitors and dosemeters. At a common position all three spectrometers were used to allow a direct comparison of their results which acts as an internal quality assurance. The comparison of the neutron spectra measured by the different groups shows very good agreement. A detailed analysis presents some differences between the shapes of the spectra and possible sources of these differences are discussed. However, the ability of Bonner sphere spectrometers to provide reliable integral quantities like fluence and ambient dose equivalent is well demonstrated in this exercise. The fluence and dose results derived by the three groups agree very well within the given uncertainties, not only with respect to the total energy region present in this environment but also for selected energy regions which contribute in certain strength to the total values. In addition to the positions outside Cave A one spectrometer was used to measure the neutron spectrum at one position in the entry maze of Cave A. In this case a comparison was possible to earlier measurements.
… of Seventh Symposium …, 1981
... Article. Report number, CERN-HS-RP-052-CF. Title, Definition of radiation quality by initial ... more ... Article. Report number, CERN-HS-RP-052-CF. Title, Definition of radiation quality by initial recombination of ions. Author(s), Zielczynski, M ; Golnik, N ; Makarewicz, M ; Sullivan, AH. Affiliation, (Inst. Nucl. Res. Swierk) ; (CERN). Imprint, 14 Aug 1980. - 11 p. ...
Radiation Protection Dosimetry, 1999
Ambient dose equivalent was determined in high energy reference radiation fields at CERN (CERF fa... more Ambient dose equivalent was determined in high energy reference radiation fields at CERN (CERF facility) using a recombination chamber and recombination methods developed in IAE. The chamber was also used for measuring the low LET background radiation which locally accompanies the fields at CERF. The measurements included determination of the absorbed dose and recombination index of radiation quality at different beam intensities. It was shown that the background might considerably influence the measurements of the absorbed dose, however, its influence on the ambient dose equivalent remains important only at low beam intensities.