Results 31 to 40 of about 585 (174)

Initial growth phase of W-fuzz formation in ultra-long pulse helium discharge in LHD

Nuclear Materials and Energy, 2017
In order to confirm the formation of a tungsten fiberform nanostructure (W-fuzz) by helium plasma exposure in the large-sized plasma confinement device, the bulk tungsten with the size of 80 × 20 × 1.5 mm3 was inserted into the divertor leg position in ...
M. Tokitani, S. Masuzaki, H. Kasahara, Y. Yoshimura, R. Sakamoto, N. Yoshida, Y. Ueda, T. Mutoh, S. Nagata   +8 more
doaj   +1 more source

Model validation of tungsten erosion and redeposition properties using biased tungsten samples on DiMES

Nuclear Materials and Energy, 2023
An experiment was performed in the DIII-D lower divertor to validate numerical SOL tungsten (W) impurity erosion and redeposition simulations against experimental data. The net and gross erosion of W were calculated as a function of the voltage (or bias)
L. Cappelli, J. Guterl, N. Fedorczak, D.L. Rudakov, G. Sinclair, T. Abrams, S. Di Genova, U. Losada, I. Bykov, Ž. Popović, D. Truong, J. Watkins, R.S. Wilcox, W.R. Wampler, E. Serre   +14 more
doaj   +1 more source

1D kinetic modelling of the JET SOL with tungsten divertor plates.

J Nucl Mater, 2013
In this work a fully kinetic model of the JET SOL with tungsten divertor plates has been developed. It includes the dynamics of main-ions (D+) and electrons, the neutrals (D, C, W) and the impurity particles (C+m, W+n). Our simulations show extremely low concentration of W impurity. We identify two reasons which are responsible for this effect: (1) for
Tskhakaya D, Groth M, JET EFDA contributors.   +2 more
europepmc   +3 more sources

Molecular deuterium behaviour in tungsten divertor on JET

Journal of Nuclear Materials, 2013
Abstract Molecular spectroscopy was used to observe molecular deuterium at the outer strike point of the new bulk tungsten JET divertor. The rotational and vibrational populations of the deuterium molecules in the ground state were determined from the deuterium Q-branches of Fulcher-α band emission ( d 3 Π u - → a 3 Σ
Sergienko, Gennady, Arnoux, G., Brezinsek, S., Clever, M., Huber, A., Kruezi, U., Meigs, A., Mertens, Ph., Samm, U., Stamp, M.   +9 more
openaire   +2 more sources

Determination of tungsten sources in the JET-ILW divertor by spectroscopic imaging in the presence of a strong plasma continuum

Nuclear Materials and Energy, 2019
The identification of the sources of atomic tungsten and the measurement of their radiation distribution in front of all plasma-facing components has been performed in JET with the help of two digital cameras with the same two-dimensional view, equipped ...
A. Huber, S. Brezinsek, A. Kirschner, P. Ström, G. Sergienko, V. Huber, I. Borodkina, D. Douai, S. Jachmich, C.h. Linsmeier, B. Lomanowski, G.F. Matthews, P.h. Mertens   +12 more
doaj   +1 more source

Design of a multi-configurations divertor for the DTT facility

Nuclear Materials and Energy, 2022
The standard positive triangularity H-mode tokamak operation with Single Null Divertor (SND) configuration and tungsten monoblocks targets can face some difficulties in providing a solution scalable towards the realization of the fusion reactor.
P. Innocente, R. Ambrosino, S. Brezinsek, G. Calabrò, A. Castaldo, F. Crisanti, G. Dose, R. Neu, S. Roccella   +8 more
doaj   +1 more source

Erosion, screening, and migration of tungsten in the JET divertor [PDF]

Nuclear Fusion, 2019
The erosion of tungsten (W), induced by the bombardment of plasma and impurity particles, determines the lifetime of plasma-facing components as well as impacting on plasma performance by the influx of W into the confined region. The screening of W by the divertor and the transport of W in the plasma determines largely the W content in the plasma core,
Brezinsek, S., Kirschner, A., Guillemaut, C., Heinola, K., Huber, Alexander, Imrisek, M., Jachmich, S., Pawelec, E., Rubel, M., Krat, S., Sergienko, G., Matthews, G. F., Mayer, M., Meigs, A. G., Wiesen, S., Widdowson, A., Baron-Wiechec, A., Borodkina, I., Borodin, D., Coffey, I., Coenen, J., den Harder, N., Eksaeva, A.   +22 more
  +9 more sources

Tungsten foil laminate for structural divertor applications – Analyses and characterisation of tungsten foil

Journal of Nuclear Materials, 2012
Abstract It has been attempted for several years to synthesise a tungsten material with a low brittle-to-ductile transition temperature and a high fracture toughness that can be used for structural parts. It was shown in our previous work that tungsten foil is ductile at room temperature and that this ductility can be transformed to bulk by ...
Reiser, J., Rieth, M., Dafferner, B., Hoffmann, A., Yi, X., Armstrong, D. E. J.   +5 more
openaire   +2 more sources

Overview of the JET ITER-like wall divertor

Nuclear Materials and Energy, 2017
The work presented draws on new analysis of components removed following the second JET ITER-like wall campaign 2013–14 concentrating on the upper inner divertor, inner and outer divertor corners, lifetime issues relating to tungsten coatings on JET ...
A. Widdowson, E. Alves, A. Baron-Wiechec, N.P. Barradas, N. Catarino, J.P. Coad, V. Corregidor, A. Garcia-Carrasco, K. Heinola, S. Koivuranta, S. Krat, A. Lahtinen, J. Likonen, M. Mayer, P. Petersson, M. Rubel, S. Van Boxel   +16 more
doaj   +1 more source

Direct Tungsten/Copper Bonding for Divertor Application

Plasma and Fusion Research, 2022
We carried out a fundamental investigation of a uniaxial direct W-to-Cu bonding at relatively low temperatures in ambient air, which would potentially allow for simple preparation and maintenance of divertor wall components. W/Cu bonds formed at 500◦C with a bonding pressure of 0.1 MPa, but the mechanical interfacial strength was about 1 MPa ...
YAMAUCHI, Keisuke, SANO, Naoki, TANABE, Katsuaki   +2 more
openaire   +1 more source