Community Research and Development Information Service - CORDIS

Abstract

Emission profiles of carbon and silicon along the heat shield (HS) were measured before and after siliconization of the vessel. Siliconization does not affect the divertor and therefore large changes in impurity concentrations and influxes cannot be attributed to it. A strong transient increase of the silicon concentration was observed immediately after the siliconization lasting for a few discharges. However, no large change was observed in the silicon influx from the HS, excluding it as possible source of the concentration increase. The fast decrease in the silicon concentration can be attributed to strong erosion at the outer limiter. The impurity influxes for C(2+) and Si(2+) from the HS are estimated and compared with the corresponding core concentrations. The relative contribution to the plasma impurity content from divertor, HS and outer protection limiter is discussed. Zeeman splitting analysis permits one to identify the emitting region of carbon radiation. Anomalously high silicon sputtering yields are measured, which do not however cause high core silicon content.

Additional information

Authors: PUGNO R, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);KALLENBACH A, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);BOLSHUKHIN D, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);DUX R, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);GAFERT J, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);NEU R, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);ROHDE V, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);SCHMIDTMANN K, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);ULLRICH W, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);WENZEL U, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE);ASDEX UPGRADE TEAM, Max-Planck-Institut f³r Plasmaphysik, IPP-EURATOM Association, Garching (DE)
Bibliographic Reference: An article published in: Elsevier; Journal of Nuclear Materials, 290-293 (2001) pp.308-311
Availability: An article published in: Elsevier; Journal of Nuclear Materials, 290-293 (2001) pp.308-311
Record Number: 200013454 / Last updated on: 2001-06-27
Category: PUBLICATION
Original language: en
Available languages: en
Follow us on: RSS Facebook Twitter YouTube Managed by the EU Publications Office Top