BORON AND CARBON FLUXES IN THE SOL OF TEXTOR DEPENDING ON BORON CONTENT AND TEMPERATURE OF THE WALL ELEMENTS

Citation
J. Vonseggern et al., BORON AND CARBON FLUXES IN THE SOL OF TEXTOR DEPENDING ON BORON CONTENT AND TEMPERATURE OF THE WALL ELEMENTS, Vacuum, 47(6-8), 1996, pp. 935-938
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied
Journal title
VacuumACNP
ISSN journal
0042-207X
Volume
47
Issue
6-8
Year of publication
1996
Pages
935 - 938
Database
ISI
SICI code
0042-207X(1996)47:6-8<935:BACFIT>2.0.ZU;2-H
Abstract
A limiter made from boron-doped graphite (3.5%, Carbon Lorraine) has b een used in TEXTOR as a single main limiter. Additional heating by neu tral beam injection (NBI) was applied resulting in heat loads up to 20 MW/m(2) on the limiter, increasing its temperature far beyond 2000 de grees C. At these high temperatures strong thermal sublimation of boro n and carbon from the limiter was measured spectroscopically. After th e set of experiments, deposits have been studied on the test limiter a nd in the SOL on collector probes by interference fringe analysis (IFA ), Auger electron spectroscopy (AES) electron microprobe (EPMA) and en ergy dispersive X-ray analysis (EDX). IFA was applied to estimate the total thickness of the deposits. A very thick boron rich layer (6 mu m ) had grown near the tangency point of the limiter Comparing the evapo rated and deposited amount of the limiter material a high local deposi tion of boron and carbon of at least about 69-70% is deduced. Copyrigh t (C) 1996 Elsevier Science Ltd.