RT journal article
T1 Dust Monitors in JET with ITER-like Wall for Diagnosis of Mobilized Particles and Co-Deposited Layers
A1 Fazinic, Stjepko
A1 Provatas, Georgios
A1 Mihalic, Iva Bozicevic
A1 Tadic, Tonci
A1 Rubel, Marek
A1 Grzonka, Justyna María
A1 Petersson, Per
A1 Widdowson, Anna
A1 Moon, Sunwoo
A1 Fortuna-Zalesna, Elzbieta
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 JET tokamak with ITER-like wall
K1 dust
K1 ion beam analysis
K1 deuterium
K1 beryllium
K1 tungsten
AB Silicon plates were installed above the inner and outer divertor of the JET with the ITER-like wall (ILW) after the second and third ILW campaigns to monitor dust generation and deposition with the aim to determine the morphology and content of individual particles and co-deposits, including deuterium content. Particular interest was in metal-based particles: Be, W, steel, Cu. Ex-situ examination after two ILW campaigns was performed by a set of microscopy and ion beam methods including micro-beam nuclear reaction analysis and particle-induced X-ray emission. Different categories of Be-rich particles were found: co-deposits peeled-off from plasma-facing components (PFC), complex multi-element spherical objects, and solid metal splashes and regular spherical droplets. The fuel content on the two latter categories was at the level of 1 x 10(16) at/cm(-2) indicating that Be melting and splashing occurred in the very last phase of the second experimental campaign. The splashes adhere firmly to the substrate thus not posing risk of Be dust mobilisation. No tungsten droplets were detected. The only W-containing particles were fragments of tungsten coatings from the divertor tiles.Keywords
PB MDPI
SN 1996-1944
YR 2022
FD 2022-12
LK http://hdl.handle.net/10498/28810
UL http://hdl.handle.net/10498/28810
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 14-nov-2026