Brittle destruction of carbon-based materials in transient heat load tests

Linke, J.; Amouroux, Solange C.; Berthe, E.; Koza, Y.; Kühnlein, W.; Rödig, M.

doi:10.1016/s0920-3796(03)00164-9

Cited by 22 publications

(23 citation statements)

References 10 publications

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“…brittle destruction (BD) under ITER relevant disruptions condition. 99,100,[103][104][105][106][107][108] Timeintegral images shows particle release from fine grain graphite (R6650, Ringsdorf) and CFC (NB31, SepCarb SNECMA) e.g. 2.4 GW/m 2 for 4.4 ms. Figure 7 shows a time-integral image during thermal shock loading (2.4 GW/ m 2 for 4.4 ms) onto CFC.…”

Section: Transient Heat Load Testing: Thermal Shock Testsmentioning

confidence: 99%

ITER Relevant High Heat Flux Testing on Plasma Facing Surfaces

2005

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The current ITER design employs beryllium, carbon fiber reinforced composite and tungsten as plasma facing materials. Since these materials are exposed to high heat fluxes during the operation, it is essential to perform high heat flux tests for R&D of ITER components. Static heat loads corresponding to cycling loads during normal operation, are estimated to be up to 20 MW/m 2 in the divertor targets and around 0.5 MW/m 2 at the first wall in ITER. For the static high heat flux testing, tests in electron beam facilities, particle beam facilities, IR heater and in-pile tests have been performed. Another type, more critical heat loads, which have high power densities and short durations, corresponding to transient events, i.e. plasma disruption, vertical displacement events (VDEs) and edge localized modes (ELMs) deliver considerable heat flux onto the plasma facing materials. For this purpose, tests in electron beam (short pulses), plasma gun and high power laser facilities have been carried out. The present work summarizes the features of these facilities and recent experimental results as well as the current selection of ITER plasma facing components.

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Section: Transient Heat Load Testing: Thermal Shock Testsmentioning

confidence: 99%

ITER Relevant High Heat Flux Testing on Plasma Facing Surfaces

2005

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“…The speeds of particles could be derived by the time lags between the two PDs as 85 m/s. Another important tools for the quantification of erosion processes are observations by means of a visible range emission spectrometer [5] and monitoring the accumulation of thermal damaging by acoustic emission (AE). Results obtained by initial AE experiments have been promising in detecting the onset of brittle destruction under high transient heat loads [12].…”

Section: New Diagnosticsmentioning

confidence: 99%

“…The existing EB test facility JUDITH was installed in Forschungszentrum Jülich in a hot cell and a wide spectrum of thermo-mechanical tests had been performed in the past [5][6][7][8]. Beneath the influence of the electron penetration, also extremely short type events like ELMs, which only recently became interesting in terms of material erosion, can only approximately be simulated.…”

Section: Introductionmentioning

confidence: 99%

The new electron beam test facility JUDITH II for high heat flux experiments on plasma facing components

Majerus

Duwe

Hirai

et al. 2005

Fusion Engineering and Design

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“…Brittle destruction was studied theoretically and experimentally [12,13,14,15,16,17]. The power law for single dust particles was observed in the wide range between two typical sizes: the grain size of materials and interatomic distance.…”

Section: Introductionmentioning

confidence: 99%

Analytical model of brittle destruction based on hypothesis of scale similarity

Arakcheev

Lotov

2012

J. Exp. Theor. Phys.

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Abstract. The size distribution of dust particles in nuclear fusion devices is close to the power function. A function of this kind can be the result of brittle destruction. From the similarity assumption it follows that the size distribution obeys the power law with the exponent between −4 and −1. The model of destruction has much in common with the fractal theory. The power exponent can be expressed in terms of the fractal dimension. Reasonable assumptions on the shape of fragments concretize the power exponent, and vice versa possible destruction laws can be inferred on the basis of measured size distributions.

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Brittle destruction of carbon-based materials in transient heat load tests

Cited by 22 publications

References 10 publications

ITER Relevant High Heat Flux Testing on Plasma Facing Surfaces

ITER Relevant High Heat Flux Testing on Plasma Facing Surfaces

The new electron beam test facility JUDITH II for high heat flux experiments on plasma facing components

Analytical model of brittle destruction based on hypothesis of scale similarity

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