Comparative analysis and new post-processing methods for plasma tomography at tokamaks

0521670 - ÚFP 2020 RIV GB eng J - Journal Article
Svoboda, Jakub - Mlynář, Jan - Imríšek, Martin - Ficker, Ondřej - Carvalho, P. … Total 6 authors
Comparative analysis and new post-processing methods for plasma tomography at tokamaks.
Journal of Instrumentation. Roč. 14, November (2019), č. článku C11001. ISSN 1748-0221. E-ISSN 1748-0221
Institutional support: RVO:61389021
Keywords : jet * Data processing methods * Nuclear instruments and methods for hot plasma diagnostics
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 1.454, year: 2019
Method of publishing: Limited access
https://iopscience.iop.org/article/10.1088/1748-0221/14/11/C11001

The JET tokamak is equipped with extensive diagnostic systems for tomography, including bolometers and soft X-ray (SXR) detectors. The tomographic reconstructions presented in this contribution were obtained using an algorithm based on Tikhonov regularisation and Minimum Fisher information. A new method for subsequent interpretative analysis of the tomographic reconstructions will be introduced. It is based on a comparison of radiated power from different regions of reconstruction, that can be defined by a rectangle or by a flux surface. The method was also used for comparative analysis of data obtained by reconstructing signals from different detectors. Both combined and separate reconstructions will be analysed. Example applications are presented, showing electron temperature drop, sawteeth instability and transport after laser blow-off.
Permanent Link: http://hdl.handle.net/11104/0306264