R. Neu G. Arnoux M. Beurskens V. Bobkov S. Brezinsek et al.
To consolidate International Thermonuclear Experimental Reactor (ITER) design choices and prepare for its operation, Joint European Torus (JET) has implemented ITER’s plasma facing materials, namely, Be for the main wall and W in the divertor. In addition, protection systems, diagnostics, and the vertical stability control were upgraded and the h…Published
C. Thomser V. Bailescu S. Brezinsek J. W. Coenen H. Greuner T. Hirai J. Linke C. P. Lungu H. Maier G. Matthews Ph. Mertens R. Neu V. Philipps V. Riccardo M. Rubel C. Ruset A. Schmidt I. Uytdenhouwen JET EFDA Contributors
The chosen materials for plasma facing components for the deuterium/tritium phase of ITER are beryllium and tungsten. These materials have already been widely investigated in various devices like ion beam or electron beam tests. However, the operation of this material combination in a large tokamak including plasma wall interaction, material degrad…Published
C. F. Maggi S. Brezinsek M. F. Stamp S. Griph P. Heesterman et al.
In preparation for ITER, JET has been upgraded with a new ITER-like wall (ILW), whereby the main plasma facing components, previously of carbon, have been replaced by mainly Be in the main chamber and W in the divertor. As part of the many diagnostic enhancements, a new, survey, visible spectroscopy diagnostic has been installed for the characteriz…Published
A. Huber S. Brezinsek Ph. Mertens B. Schweer G. Sergienko et al.
A new endoscope with optimised divertor view has been developed in order to survey and monitor the emission of specific impurities such as tungsten and the remaining carbon as well as beryllium in the tungsten divertor of JET after the implementation of the ITER-like wall in 2011. The endoscope is a prototype for testing an ITER relevant design con…Published
A. Kreter H. G. Esser S. Brezinsek J. P. Coad A. Kirschner W. Fundamenski V. Philipps R. A. Pitts A. Widdowson
The impact of edge localized modes (ELMs) carrying energies of up to 450 kJ on carbon erosion in the JET inner divertor is assessed by means of time resolved measurements using an in situ quartz microbalance diagnostic. The inner target erosion is strongly nonlinearly dependent on the ELM energy: a single 400 kJ ELM produces the same carbon erosion…Published
M. Krychowiak Ph. Mertens B. Schweer S. Brezinsek R. Konig O. Schmitz M. Brix T. Klinger U. Samm
Local values of the electron density and temperature in the edge of a fusion plasma can be derived with high space and time resolution by the use of line radiation of atomic helium beams. The accuracy of this method is mainly limited by the uncertainties in the coUisional-radiative model which is needed in order to obtain both plasma parameters fro…Published