Národní úložiště šedé literatury Nalezeno 3 záznamů.  Hledání trvalo 0.01 vteřin. 
Performance of self-developing radiography films in LVR-15's neutron beams
Šoltés, J. ; Viererbl, L. ; Klupák, V. ; Vinš, M. ; Michalcová, Božena
In the search for a suitable detector for demonstration neutron radiography measurements on the zero-power VR-1 training reactor at the Czech Technical University in Prague, some options were considered. Due to the reactor's low power and spatial limitations, an easy and practical solution had to be found. Self-developing films represent a flexible detection tool in x-ray imaging. Therefore, the goal of this study was to evaluate their potential for neutron detection. For this purpose, bare and converter covered films were studied in the thermal and epithermal neutron beams at the LVR-15 research reactor in Rez, Czech Republic.
Status of Development of High Temperature Radiation Hardened Hall Sensors for Energy Producing Fusion Devices
Kovařík, Karel ; Ďuran, Ivan ; Sentkerestiová, J. ; Oszwaldowski, M. ; Viererbl, L. ; Boshakova, I. ; Holyaka, R. ; Erashok, V.
A principally new diagnostic method has to be developed to allow the magnetic measurements in true steady state regime of operation of future fusion reactors. One of the options is use of diagnostics based on Hall sensors that are well established in experimental physics and industry. There are two main issues associated with the use of Hall sensors in harsh environment of future fusion reactors. They are low survival temperature of available commercial transducers and unreliability of these mostly semiconductor sensors under neutron irradiation. This paper describes status of development of sensors to be operational in conditions mentioned above.
Ozařovací testy Hallových senzorů
Kovařík, Karel ; Ďuran, Ivan ; Oszwaldowski, M. ; Viererbl, L.
A principally new diagnostic method has to be developed to complement the magnetic measurements in true steady state regime of operation of future fusion reactors. One of the options is the use of diagnostics based on Hall sensors that are well established in experimental physics and industry, although it is rarely implemented in the fusion plasma physics due to short pulse operation of majority of present day tokamaks. There are two main issues associated with the use of Hall sensors in harsh environment of future fusion reactors i.e. low survival temperature of presently available commercial transducers and questionable stability of these mostly semiconductor sensors under neutron irradiation. Hall sensors based on InSb thin film layers are presently being evaluated as one of the perspective options for ITER ex-vessel steady state magnetic sensors. Here, the compatibility with vacuum vessel baking temperature of 220 oC and with the peak life time neutron fluence of 1018 n/

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