Error estimation and parameter dependence of the calculation of the fast ion distribution function, temperature, and density using data from the KF1 high energy neutral particle analyzer on Joint European Torus
2004 (English)In: Review of Scientific Instruments, ISSN 0034-6748, E-ISSN 1089-7623, Vol. 75, no 10, 3547-3549 p.Article in journal (Refereed) Published
Joint European Torus high energy neutral particle analyzer measures the flux of fast neutrals originating from the plasma core. From this data, the fast ion distribution function f(i)(fast), temperature T-i,perpendicular to(fast), and density n(i)(fast) are derived using knowledge of various plasma parameters and of the cross section for the required atomic processes. In this article, a systematic sensitivity study of the effect of uncertainties in these quantities on the evaluation of the neutral particle analyzer f(i)(fast), T-i,perpendicular to(fast), and n(i)(fast) is reported. The dominant parameter affecting n(i)(fast) is the impurity confinement time and therefore a reasonable estimate of this quantity is necessary to reduce the uncertainties in n(i)(fast) below 50%. On the other hand, T-i,perpendicular to(fast) is much less sensitive and can certainly be provided with an accuracy of better than 10%.
Place, publisher, year, edition, pages
2004. Vol. 75, no 10, 3547-3549 p.
IdentifiersURN: urn:nbn:se:kth:diva-40541DOI: 10.1063/1.1788874ISI: 000224755900049ScopusID: 2-s2.0-9944230601OAI: oai:DiVA.org:kth-40541DiVA: diva2:441593
QC 20110916. 15th Topical Conference on High-Temperature Plasma Diagnostics. San Diego, CA. APR 19-22, 2004 2011-09-162011-09-162011-10-17Bibliographically approved