Book/Report

FZJ-2018-01592

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Iron transport in a confined high temperature plasma

Demokan, O. ; Waelbroeck, F.FZJ*

1981
Kernforschungsanlage Jülich, Verlag Jülich

Please use a persistent id in citations: http://hdl.handle.net/2128/17553

Report No.: Juel-1720

Abstract: The neo-classical flux, $\Gamma_{n.c}$, of Fe XXIII is calculated for the experimental conditions produced in PLT by using the data an the iron density profiles and the plasma parameters. The actual flux of Fe XXIII, $\Gamma_{c.e}$ , is then evaluated fron the continuity equation, by using the same data. $\Gamma_{c.e}$ is an the average two orders of magnitude larger than $\Gamma_{n.c}$ , the neo-classical prediction. These results are further tested by introducing the neo-classical coefficients 'uhich are multiplied by various anomaly factors into the continuity equation and solving for the density profile of Fe XXIII, using the experimental profiles of Fe XXII and Fe XXIV as given. The resuits of this sectim indicate that the firnt and the second Germs in the neo-classical flux expression, $\Gamma_{n.c}$ = - D$_{I}$ (dn/dr) + D$_{2}$n, should be multiplied approximately by the factors (100) and (25), respectively in order to yield the experimentally observed profile of Fe XXIII. Furthermore, a sensitivity analysis is performed to investigate the dependence of the value of the flux, $\Gamma_{c.e}$, an the uncertainties in the ratecoefficients. This dependence is found to be quite sensitive. Uncertainties of a facto,: of two in these coefficients couid yield radially inward or outward fluxes, which are by orders of magnitude larger than the flux computed without uncertainty factors.

---

Contributing Institute(s):

1. Publikationen vor 2000 (PRE-2000)

Research Program(s):

1. 899 - ohne Topic (POF3-899) (POF3-899)

---

Database coverage:

---