|Title||First Mirrors Test in JET for ITER: An overview of optical performance and surface morphology|
|Publication Type||Journal Article|
|Year of Publication||2010|
|Authors||M. Rubel, J.P Coad, G. De Temmerman, A. Hakola, D. Hole, J. Likonen, I. Uytdenhouwen, A. Widdowson|
|Journal||Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment|
|Type of Article||Proceedings Paper|
|Keywords||beryllium, CARBON, CO-DEPOSITED, CONTROLLED FUSION DEVICES, DEPOSITION, DIAGNOSTIC MIRRORS, divertor, EROSION, Erosion and, FUEL INVENTORY, ITER, JET, LAYERS, OPERATION, Plasma-facing components, REFLECTIVITY, Surface analysis, WALL COMPONENTS|
Metallic mirrors will be essential components of all optical systems for plasma diagnosis in ITER. A comprehensive First Mirror Test (FMT) has been carried out in the JET tokamak. The exposure was followed by a characterisation of mirrors and their carriers. The main results obtained by optical and surface analysis methods are: (i) reflectivity of all tested mirrors is degraded either by erosion with charge exchange neutrals or by the formation of thick deposits; (ii) deuterium and carbon are the main elements detected on all mirror surfaces and the presence of beryllium is also found in several cases; (iii) thick deposits show columnar structure; (iv) bubble-like structures are detected in deposits; their formation is a probable reason for deposits' disintegration and peeling-off; (v) the deposition in channels in the divertor cassettes is pronounced at the very entrance and then it sharply decreases with the distance from the plasma, lambda similar to 5-7 mm. (C) 2010 OCNL - Operating Company. Published by Elsevier B.V. All rights reserved.
|URL||<Go to ISI>://000284343600044|
|Alternate Title||Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc. Equip.|
Go back one page.