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Měření potenciálu plazmatu pomocí ball-pen a Langmuirovy sondy
Peterka, Matěj ; Tichý, Milan (advisor) ; Komm, Michael (referee)
The ball-pen probe is a unique probe recently developed at the Institite of Plasma Physics in Prague. It has been designed for direct measurement of plasma potential at the CASTOR tokamak. It has also been succesfully tested on several other high-temperature plasma devices in Europe. The aims of the bachelor work are primarily experimental. A ball-pen probe has been constructed from available materials, which is suitable for measurement in the low-temperature plasma of a cylindrical magnetron. Although its parameters are much different from those in high-temperature plasma devices, the main principle of measurement with ball-pen probe has been proven to apply also in this brand-new conditions.
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Experimental and theoretical study of utilization of probe methods for plasma diagnostics
Peterka, Matěj ; Tichý, Milan (advisor) ; Horáček, Jan (referee)
The ball-pen probe is a unique probe recently developed at the Institite of Plasma Physics in Prague. It has been designed for direct measurement of plasma potential at the CASTOR tokamak. Nowadays, it is used routinely at several tokamaks in Europe, and the first tests in low-temperature plasma have also already been performed. The aims of the thesis are primarily experimental. A ball-pen probe has been constructed from available materials, which is suitable for systematic measurements of radial profiles in the low-temperature plasma of a cylindrical magnetron. By means of comparison to other diagnostics, it was proved that ball- pen probe is able to directly measure plasma potential in a certain range of plasma parameters even though its current-voltage characteristic is not symmetric, which is in contradiction with the simplified theory for ball-pen probe. Powered by TCPDF (www.tcpdf.org)
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Experimental and theoretical study of utilization of probe methods for plasma diagnostics
Peterka, Matěj ; Tichý, Milan (advisor) ; Horáček, Jan (referee)
The ball-pen probe is a unique probe recently developed at the Institite of Plasma Physics in Prague. It has been designed for direct measurement of plasma potential at the CASTOR tokamak. Nowadays, it is used routinely at several tokamaks in Europe, and the first tests in low-temperature plasma have also already been performed. The aims of the thesis are primarily experimental. A ball-pen probe has been constructed from available materials, which is suitable for systematic measurements of radial profiles in the low-temperature plasma of a cylindrical magnetron. By means of comparison to other diagnostics, it was proved that ball- pen probe is able to directly measure plasma potential in a certain range of plasma parameters even though its current-voltage characteristic is not symmetric, which is in contradiction with the simplified theory for ball-pen probe. Powered by TCPDF (www.tcpdf.org)
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Měření potenciálu plazmatu pomocí ball-pen a Langmuirovy sondy
Peterka, Matěj ; Tichý, Milan (advisor) ; Komm, Michael (referee)
The ball-pen probe is a unique probe recently developed at the Institite of Plasma Physics in Prague. It has been designed for direct measurement of plasma potential at the CASTOR tokamak. It has also been succesfully tested on several other high-temperature plasma devices in Europe. The aims of the bachelor work are primarily experimental. A ball-pen probe has been constructed from available materials, which is suitable for measurement in the low-temperature plasma of a cylindrical magnetron. Although its parameters are much different from those in high-temperature plasma devices, the main principle of measurement with ball-pen probe has been proven to apply also in this brand-new conditions.
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Analýza relaxačních jevů v tokamaku CASTOR vyvolaných nabíjením okrajového plazmatu hluboce vnořenou elektrodou
Brotánková, Jana ; Stöckel, Jan ; Hron, Martin ; Štěpán, Michal ; Peterka, Matěj ; Horáček, Jan ; Ďuran, Ivan ; Spolaore, M. ; Peleman, P.
Transport of plasma to the walls is one of the crucial topics in magnetic confinement fusion research. In tokamak CASTOR, during special regimes with strong biasing of plasma, we can observe relaxation events, corresponding to increasing and collapsing of a transport barrier. High spatially and temporally resoluted arrays of probes enable us to describe these phenomena in details.
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