Temat: X- ray - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Review of X-ray detection systems
Autorzy:: Urbański, Paweł
Grzebyk, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/27315700.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:: X-ray detection
X-ray radiation
dosimetry
luminescence
Opis:: The article presents an overview and a classification of X-ray detection methods. The main motivation for its preparation was the need to select a suitable and useful method for detecting signals from a currently developed miniature micro-electro-mechanical system (MEMS) X-ray source. The described methods were divided into passive and active ones, among which can be distinguished: chemical, luminescent, thermo-luminescent, gas ionization, semiconductor, and calorimetric methods. The advantages and drawbacks of each method were underlined, as well as their usefulness for the characterisation of the miniature MEMS X-ray source.
Źródło:: Opto-Electronics Review; 2023, 31, 3; art. no. e146554
1230-3402
Pojawia się w:: Opto-Electronics Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Wideband spectral emission measurements from laser-produced plasma EUV/SXR source based on a double gas puff target
Autorzy:: Arikkatt, Antony Jose
Wachulak, Przemysław
Fiedorowicz, Henryk
Bartnik, Andrzej
Czwartos, Joanna
Powiązania:: https://bibliotekanauki.pl/articles/1849155.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: Plasma Spectroscopy
X-ray coherence tomography
soft X-ray
Opis:: We present spectral emission characteristics from laser-plasma EUV/SXR sources produced by irradiation of < 1 J energy laser pulse on eleven different double stream gas puff targets, with most intense electronic transitions identified in the spectral range from 1 nm to 70 nm wavelength which corresponds to photon energy from 18 eV to 1240 eV. The spectra were obtained using grazing incidence and transmission spectrographs from laser-produced plasma emission, formed by the interaction of a laser beam with a double stream gas puff target. Laser pulses with a duration of 4 ns and energy of 650 mJ were used for the experiment. We present the results obtained from three different spectrometers in the wavelength ranges of SXR (1-5.5 nm), SXR/EUV (4-15.5 nm), and EUV (10-70 nm). In this paper, detailed information about the source, gas targets under investigation, the experimental setup, spectral measurements and the results are presented and discussed. Such data may be useful for the identification of adequate spectral emissions from gasses in the EUV and SXR wavelength ranges dedicated to various experiments (i.e. broadband emission for the X-ray coherence tomography XCT) or may be used for verification of magnetohydrodynamic plasma codes.
Źródło:: Metrology and Measurement Systems; 2020, 27, 4; 701-719
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: $K_{β}/K_{α}$ X-Ray Intensity Ratios for Cr, Mn, Fe, and Co Excited by 8.735 keV Energy
Autorzy:: Yılmaz, R.
Powiązania:: https://bibliotekanauki.pl/articles/1398200.pdf
Data publikacji:: 2018-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: K X-ray intensity ratios
X-ray fluorescence
cross-sections
Opis:: In this study, the K shell intensity ratios $K_{β}/K_{α}$ have been experimentally determined for the elements Cr, Mn, Fe, and Co. Measurements have been carried out at 8.735 keV excitation energy by using secondary excitation method. K X-rays emitted by samples have been counted by a Si (Li) detector with 160 eV resolutions at 5.9 keV. The measured values were compared with the calculated theoretical values. The obtained values are in good agreement with the calculated values.
Źródło:: Acta Physica Polonica A; 2018, 133, 5; 1227-1230
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Pomiar czasu ekspozycji w miernikach promieniowania rentgenowskiego
Measurement of exposure duration in the X-ray analyser
Autorzy:: Urban, Arkadiusz
Czubla, Albin
Knyziak, Adrian
Powiązania:: https://bibliotekanauki.pl/articles/88863.pdf
Data publikacji:: 2020
Wydawca:: Główny Urząd Miar
Tematy:: pomiar czasu ekspozycji
promieniowanie X
aparat rentgenowski
exposure time measurement
X-ray
X-ray machine
X-ray multimeter
Opis:: W artykule opisano problematykę pomiarów przedziałów czasu równych czasowi ekspozycji promieniowania X. Pokazano zależność niepewności pomiaru od metody pomiarowej oraz od sposobu działania źródła promieniowania rentgenowskiego. Przedstawiono wpływ zakresu przedziału czasu mierzonego przez miernik na błąd pomiaru.
The main idea of the article is a description of problems of X-ray exposure time measurement. The content describes two types of X-ray machines. Among the two X-ray machine types, continuous type with shutter is more suitable for long time measurement, and pulse type is better for short time measurements. The differences between mode of operation of different X-ray sources and it’s impact on uncertainty of measurement of exposure time are presented. It also discusses the impact of different resolution settings of device under calibration on uncertainty measurement.
Źródło:: Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar; 2020, 1 (24); 15-20
2300-8806
Pojawia się w:: Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: X pinch as a source for X-ray radiography
Autorzy:: Pikuz, S.
Shelkovenko, T.
Romanova, V.
Sinars, D.
Hammer, D.
Bland, S.
Lebedev, S.
Powiązania:: https://bibliotekanauki.pl/articles/147532.pdf
Data publikacji:: 2001
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: wire array
X-pinch
X-ray imaging
X-ray radiography
Z-pinch
Opis:: This article describes several applications and methods using the X pinch as a source of X-ray radiation for the radiography of dense plasma objects. These methods, in general, do not use pinholes, and instead take the advantage of the small size (<1 mm, and in some cases <3 mm) and a short X-ray emission duration (<1 ns) of the radiation source produced by an X pinch. Two of these methods, monochromatic and direct point-projection backlighting, are discussed. Experimental images of exploding wires and wire arrays obtained on the BIN, XP, and MAGPIE generators using these techniques are presented. Also included are detailed measurements made on the XP generator of the emission characteristics of X pinches using different wire materials.
Źródło:: Nukleonika; 2001, 46, 1; 21-25
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Wzorcowanie funkcji pomiaru czasu ekspozycji w miernikach promieniowania rentgenowskiego
Calibration of exposure duration in the X-ray analyser
Autorzy:: Urban, Arkadiusz
Czubla, Albin
Knyziak, Adrian
Powiązania:: https://bibliotekanauki.pl/articles/268140.pdf
Data publikacji:: 2019
Wydawca:: Politechnika Gdańska. Wydział Elektrotechniki i Automatyki
Tematy:: wzorcowanie miernika promieniowania X
pomiar czasu ekspozycji
promieniowanie X
aparat rentgenowski
calibration
exposure time measurement
X-ray
X-ray machine
X-ray multimeter
Opis:: W artykule opisano problematykę pomiarów przedziałów czasu równych czasowi ekspozycji promieniowania X. Pokazano zależność niepewności pomiaru od metody pomiarowej oraz od sposobu działania źródła promieniowania rentgenowskiego. Przedstawiono wpływ zakresu przedziału czasu mierzonego przez miernik na wielkość błędu.
Main idea of the article is a description of problems of X-ray exposure time measurement. Content describes two types of X-ray machines. Among the two X-ray machine types, continuous type with shutter is more suitable for long time measurement, and pulse type is better for short time measurements. The article discuss differences between mode of operation of different X-ray sources and it’s impact on uncertainty of measurement of exposure time. It also discuss impact of different resolution settings of device under calibration on uncertainty measurement.
Źródło:: Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej; 2019, 66; 91-94
1425-5766
2353-1290
Pojawia się w:: Zeszyty Naukowe Wydziału Elektrotechniki i Automatyki Politechniki Gdańskiej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Recent measurements of soft X-ray emission from the DPF-1000U facility
Autorzy:: Surała, W.
Sadowski, M. J.
Paduch, M.
Zielinska, E.
Tomaszewski, K.
Powiązania:: https://bibliotekanauki.pl/articles/148171.pdf
Data publikacji:: 2015
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: plasma focus
X-ray emission
X-ray images
gas puffing
filaments
hot spots
Opis:: Soft X-ray imaging is a very useful diagnostic technique in plasma-focus (PF) experiments. This paper reports results of four experimental sessions which were carried out at the DPF-1000U plasma-focus facility in 2013 and 2014. Over 200 discharges were performed at various experimental conditions. Measurements were taken using two X-ray pinhole cameras with a line of sight perpendicular to the z-axis, at different azimuthal angles (about 20° and 200°), and looking towards the centre of the PF-pinch column. They were equipped with diaphragms 1000 μm or 200–300 μm in diameter and coated with filters of 500 μm Al foil and 10 μm Be foil, respectively. Data on the neutron emission were collected with silver activation counters. For time-resolved measurements the use was made of four PIN diodes equipped with various fi lters and oriented towards the centre of the PF-column, in the direction perpendicular to the electrode axis. The recorded X-ray images revealed that when the additional gas-puff system is activated during the discharge, the stability of the discharge is improved. The data collected in these experiments confi rmed the appearance of a filamentary fi ne structure in the PF discharges. In the past years the formation of such fi laments was observed in many Z-pinch type experiments. Some of the recorded X-ray images have also revealed the appearance of the so-called hot- -spots, i.e. small plasma regions of a very intense X-ray emission. Such a phenomenon was observed before in many PF experiments, e.g. in the MAJA-PF device, but it has not been investigated so far in a large facility such as the DPF-1000U. The time-resolved measurements provided the evidence of a time lapse between the X-ray emission from plasma regions located at different distance from the anode surface. The formation of distinct ‘hot-spots’ in different instants of the DPF-1000U discharge was also observed.
Źródło:: Nukleonika; 2015, 60, 2; 303-308
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: High speed signal processing for photon counting X-ray detection
Autorzy:: Shinomiya, B.
Koike, A.
Morii, H.
Okunoyama, T.
Neo, Y.
Mimura, H.
Aoki, T.
Powiązania:: https://bibliotekanauki.pl/articles/385292.pdf
Data publikacji:: 2009
Wydawca:: Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:: X-ray
CdTe
photon counting
Opis:: Recently practical X-ray measurement systems are demanded energy distinction function. Photon-counting CdTe semiconductor detectors have a high energy resolution in a low count rate condition at room temperature. However, the energy resolution is decreased by pile-up phenomenon in a high count rate condition. In conventional signal processing, processing time estimated X-ray photon energy from the pulse waveform is about tens of microseconds. This time is depended on the pulse decay time. This paper purposes to maintain the high energy resolution by changing the signal-processing algorithm, which derived the pulse rise height of the output waveform from the CdTe detector in a high count rate condition. As a result, the pulse rise time required to estimate the pulse rise height was short about 100 ns at incident X-ray energy 60 keV. As the result of energy spectrum by using this data, the FWHM of about 11keV (at 60 keV) when the count rate of 500 kcps. This result shows the possibility that the photon counting sensor has application for the high count rate imaging without decrease of the high energy resolution.
Źródło:: Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 143-146
1897-8649
2080-2145
Pojawia się w:: Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Preliminary study on X-ray source from Plasma Focus device for fast radiography
Autorzy:: Da Re, A.
Mezzetti, F.
Tartari, A.
Verri, G.
Rapezzi, L.
Gribkov, V. A.
Powiązania:: https://bibliotekanauki.pl/articles/147243.pdf
Data publikacji:: 2001
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: plasma focus
X-ray sources
Opis:: Plasma derived flash X-ray sources may find potential applications in medicine and industry. Notwithstanding, as is the case of Plasma Focus (PF) devices, their characterisation in term of photon energy, temporal and spatial beam stability is far to be considered satisfactory. In this work, a radiographic approach, which avoids the effects caused by the intrinsic instability of the pinch output of a PF machine, is proposed and an attenuation curve can be attained even in presence of Xray emission instability. Using two radiographic films for each shot exposition symmetrically positioned and collimated to the pinch region the mean energy of the photons in the X-ray beam are evaluated. The X-ray emission symmetry from the pinch region was then utilised to control the validity of the proposed methodology.
Źródło:: Nukleonika; 2001, 46, suppl. 1; 123-125
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: X-ray techniques in the investigation of a Gothic sculpture : the risen Christ
Autorzy:: Mikołajska, A.
Walczak, M.
Kaszowska, Z.
Urbańczyk-Zawadzka, M.
Powiązania:: https://bibliotekanauki.pl/articles/146866.pdf
Data publikacji:: 2012
Wydawca:: Instytut Chemii i Techniki Jądrowej
Tematy:: cultural heritage
X-ray image
X-ray dual source computed tomography (DSCT)
scanning electron microscopy energy dispersed X-ray spectroscopy (SEM-EDX)
Opis:: For over a century, X-ray radiation has played an important role in the area of the conservation and restoration of cultural heritage objects. X-ray techniques are amongst the most fundamental and helpful methods used in the investigation of art works. This paper reviews the application of traditional radiography, X-ray dual source computed tomography (DSCT) and scanning electron microscopy combined with energy dispersed X-ray spectroscopy (SEM-EDX) to the investigation of a wooden, Gothic sculpture, The risen Christ. Thanks to the properties of X-ray radiation (different absorption by various materials) first two methods allow the assessment of the preservation state and the observation of the internal structure of an object in 3-D. While SEM-EDX analysis permits the elemental analysis of the polychrome layers. As a result 2-D and 3-D images, permitting the full volume inspection of an object, were taken in a totally non-destructive way. The morphological and physical information about the inner structure of the investigated wooden sculpture was obtained, revealing changes related to previous restorations, as well as ageing effects. Employing the SEM-EDX, painting materials (pigments and filers), were identified. Gained data is essential for restorers to understand the whole structure of the studied object and to decide which further investigation and restoration steps have to be undertaken.
Źródło:: Nukleonika; 2012, 57, 4; 627-631
0029-5922
1508-5791
Pojawia się w:: Nukleonika
Dostawca treści:: Biblioteka Nauki

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