An ITER-like wall for JET

Paméla, J.; Matthews, G. F.; Philipps, V.; Kamendje, R.

doi:10.1016/j.jnucmat.2006.12.056

Cited by 117 publications

(119 citation statements)

References 26 publications

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“…However, so far there is no available data on the performance of this materials combination in a fusion environment. For that purpose the ITER-like Wall Project was launched at Joint European Tokamak with the goal to test this materials combination at the most ITER-relevant parameters accessible today [4][5][6]. In the current ITER-like wall project, tungsten lamellae stacks are installed in the load-bearing septum replacement plate and W coatings on CFC in the other divertor regions [7].…”

Section: Introductionmentioning

confidence: 99%

Carbide formation in tungsten coatings on carbon-fibre reinforced carbon substrates

et al. 2013

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Tungsten coatings with molybdenum interlayer deposited on carbon-fibre reinforced carbon (CFC) substrates were selected as the first wall material for the divertor in the ITERlike Wall Project at Joint European Torus. For such a layered structure, diffusion of carbon from the CFC substrate towards the Mo and W deposits is expected during the operation of the reactor. As both molybdenum and tungsten form stable carbides, brittle compounds may form at the interface, thus strongly affecting the thermomechanical performance of the coated tiles. For the purpose of prediction of the operation time of such coated tiles, carbon diffusion and carbide formation kinetics need to be determined.In the present study, W/Mo/CFC samples were subjected to heat treatment at 1470 K for various annealing times. The Focused Ion Beam technique was used for sample preparation for electron microscopy examinations. Transmission electron microscopy observations supported with diffraction pattern analyses revealed the both W 2 C and WC carbides in the W coating, as well as that of Mo 2 C carbide in the Mo layer. The results were used to estimate the kinetics of coatings degradation.2

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Section: Introductionmentioning

confidence: 99%

Carbide formation in tungsten coatings on carbon-fibre reinforced carbon substrates

et al. 2013

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“…In the present design for ITER it is also foreseen to build parts of the divertor-the strike zone-from CFC (carbon fiber composites) material [1,2]. These surfaces are exposed to a substantial incoming flux of ions and neutrals from the main plasma which leads to erosion of the divertor tiles emitting carbon and hydrocarbon compounds into the boundary plasma.…”

Section: Introductionmentioning

confidence: 99%

Redeposition of amorphous hydrogenated carbon films during thermal decomposition

Salançon

Dürbeck

Schwarz-Selinger

et al. 2008

Journal of Nuclear Materials

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hermally induced decomposition of hard and soft amorphous hydrocarbon films was investigated by thermal effusion spectroscopy. Released species were detected by a sensitive quadrupole mass spectrometer using two different experimental setups for thermal effusion. Species released in a molecular beam setup were detected in direct line of sight to the sample surface, while species released in a remote UHV oven had no direct line of sight to the mass spectrometer. Soft, hydrogen-rich carbon films exhibit a desorption maximum at T≈740 K while hard films with a low hydrogen content have their maximum at T≈870 K. Additionally, the spectrum of released species differs dramatically between hard and soft films. We found a significant redeposition of species released from soft films. From the redeposited fraction of material we estimated an average redeposition probability of about 50% for species released from soft films.

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“…Since 2011, JET operates with a full metal wall made out of beryllium and tungsten [5,6]. Equipped with the same wall materials as foreseen for ITER ('ITER-like wall'), JET has basically become a small version of ITER, which can gain experience with D-T experiments in an ITER-like environment and with ITER-relevant plasma scenarios.…”

Section: Jet-past and Expected Performancementioning

confidence: 99%

Risk Mitigation for ITER by a Prolonged and Joint International Operation of JET

et al. 2015

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Prolonged operation of the Joint European Torus (JET) in a set-up involving all ITER partners will be beneficial for ITER. Experiments at JET with its ITER-like wall and using a D-T plasma mixture will help to mitigate risks in the ITER research plan. Training of the ITER operators, technicians and engineers at JET will safe valuable time when ITER comes into operation. Moreover, the way in which the future ITER experiments will be organized can already be experienced at JET, by imposing a similar organisational structure. This paper will present arguments in favour of an extension of JET and additionally briefly discuss a number of enhancements that will make experiments on JET even more relevant for ITER.

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An ITER-like wall for JET

Cited by 117 publications

References 26 publications

Carbide formation in tungsten coatings on carbon-fibre reinforced carbon substrates

Carbide formation in tungsten coatings on carbon-fibre reinforced carbon substrates

Redeposition of amorphous hydrogenated carbon films during thermal decomposition

Risk Mitigation for ITER by a Prolonged and Joint International Operation of JET

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