Investigation of inversion methods for calculation of soft X-ray-based plasma position and its consistency with magneticall determined position on tokamaks
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F16%3A00471067" target="_blank" >RIV/61389021:_____/16:00471067 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Investigation of inversion methods for calculation of soft X-ray-based plasma position and its consistency with magneticall determined position on tokamaks
Original language description
Distribution of soft X-ray (SXR) radiation in tokamak plasma can be reconstructed via tomography from line integrated measurements. The center of mass of the SXR distribution gives reliable information about plasma position assuming anprimary source being bremsstrahlung. The Tikhonov regularization constrained by the minimum Fisher information is often applied tonsolve the ill-posed and underdetermined plasma tomography. There are two ways how to apply this method on large datasets: to use either a rapid version that process all time slices simultaneously or linear inversion methods which provide the center of radiationnas a scalar product of the measured data and precomputed weight vector. Here, robustness, reliability and computational time of various methods of the calculation of the center of SXR emissivity are compared on modeled and real data. Furthermore, consistency of the magnetic and SXR plasma position influenced by the plasma shape and impurities is analyzed and discussed.n
Czech name
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Czech description
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Classification
Type
O - Miscellaneous
CEP classification
BL - Plasma physics and discharge through gases
OECD FORD branch
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Result continuities
Project
<a href="/en/project/LG14002" target="_blank" >LG14002: Direct scientific participation in the thermonuclear research programme of the Joint European Torus JET</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů