Advantages of the first-derivative probe technique over the three- and four-parameter probe techniques in fusion plasmas diagnostics

0489645 - ÚFP 2019 RIV GB eng J - Journal Article
Hasan, E. - Dimitrova, Miglena - Popov, T. - Ivanova, P. - Dejarnac, Renaud - Stöckel, Jan - Pánek, Radomír
Advantages of the first-derivative probe technique over the three- and four-parameter probe techniques in fusion plasmas diagnostics.
Journal of Instrumentation. Roč. 13, č. 4 (2018), č. článku P04005. ISSN 1748-0221. E-ISSN 1748-0221
R&D Projects: GA MŠMT(CZ) LM2015045
Institutional support: RVO:61389021
Keywords : Plasma potential * electron temperature * bi-Maxwellian EEDF * Divertor Langmuir probes * three- and four-parameter probe techniques * first-derivative probe technique
OECD category: 2.11 Other engineering and technologies
Impact factor: 1.366, year: 2018
http://iopscience.iop.org/article/10.1088/1748-0221/13/04/P04005/meta

In this work, the advantages are presented and discussed of the first-derivative probe technique over the three- and the four-parameter conventional probe techniques for diagnostics of fusion plasmas. The conventional probe techniques for estimation of the plasma potential and the electron temperature and density can only be used when the electron energy distribution function (EEDF) is Maxwellian. The first-derivative probe technique can provide reliable results for the plasma potential and the real EEDF when the latter deviates from Maxwellian. To exemplify the application of the results obtained by different techniques, results on the parallel power-flux density distribution in the divertor region of the COMPASS tokamak, IPP.CR, are presented and discussed.
Permanent Link: http://hdl.handle.net/11104/0284056