Tungsten as a plasma facing material in fusion devices

A strong effort has been put into tungsten investigations at the Garching tokamak ASDEX Upgrade. There are some relevant areas which have to be encountered in other dedicated experiments. These are described shortly. Then the experimental tools, which were developed particularly for these investigations are described. Thereafter the results of the spectroscopic investigations and their comparison to ab initio atomic physics calculations are discussed. In the following a theoretical description of the transport processes relevant to the tungsten investigations is given. The W experiments stated above and their results are described and the comparison with experiments at other devices as well as the resulting perspectives for a reactor are given. The last chapter summarises the results and gives some concluding remarks. The basic concepts of magnetically confined nuclear fusion, the tokamak device ASDEX Upgrade, as well as the main plasma diagnostics are given in the Appendix. (orig.)SIGLEAvailable from TIB Hannover: RA 71(10/25) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman