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Infrared detection ...
Infrared detection of tungsten cracking on actively cooled ITER-like component during high power experiment in WEST
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- Tichit, Q. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Durif, A. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Gaspar, J. (author)
- Aix Marseille Univ, CNRS, IUSTI, Marseille, France.
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- Anquetin, Y. (author)
- Aix Marseille Univ, CNRS, IUSTI, Marseille, France.
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- Corre, Y. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Diez, M. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Dubus, L. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Firdaouss, M. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Gerardin, J. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Grosjean, A. (author)
- Univ Tennessee, Dept Nucl Engn, Knoxville, TN 37996 USA.
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- Gunn, J. P. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Krieger, K. (author)
- Max Planck Inst Plasma Phys, D-85748 Garching b, Munich, Germany.
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- Missirlian, M. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Ratynskaia, Svetlana V. (author)
- KTH,Rymd- och plasmafysik
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- Reilhac, P. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Richou, M. (author)
- Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France.
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- Rigollet, F. (author)
- Aix Marseille Univ, CNRS, IUSTI, Marseille, France.
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Inst Res Fus Magnet Confinement, CEA, F-13108 St Paul Les Durance, France Aix Marseille Univ, CNRS, IUSTI, Marseille, France. (creator_code:org_t)
- Elsevier BV, 2023
- 2023
- English.
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In: Nuclear Materials and Energy. - : Elsevier BV. - 2352-1791. ; 37
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The consequences of tungsten (W) damaging processes, such as cracking and melting, on divertor lifetime and plasma operation are high priority issues for ITER. A sustained melting experiment was conducted in WEST using a 2 mm deep groove geometry on the upstream mono-block (MB) to overexpose the sharp leading edge (LE) of the downstream MB. W-cracking has been evidenced for the first time with a very high spatial resolution infrared camera before tungsten melting was reached. These cracks develop when the monoblock temperature is about 2600 degrees C, thus higher than both ductile to brittle transition and softening threshold of tungsten, suggesting that these cracks are different from the ones observed in previous campaigns where brittle failure was involved, because of transient events on cold monoblock. Post-exposure analyses have been performed on the damaged monoblock, highlighting 12 main cracks on the LE, with a width varying from 33 mu m to 77 mu m, and an average spacing of 0.45 mm. Parallel heat flux about 90 MW/m2 has been derived from infrared temperature measurements, with a heat flux decay length on the target of 4 mm. The T-REX modelling code suggest here that with these thermal inputs, a crack can initiates due to thermal cycling without disruption, with a ductile failure, under 1 to 5 cycles for a tungsten DBTT varying from 400 degrees C to 500 degrees C.
Subject headings
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- Divertor
- Plasma-facing components
- Actively cooled
- Tungsten cracking
- High power
- Ductile failure
- Thermal cycling
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Tichit, Q.
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Durif, A.
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Gaspar, J.
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Anquetin, Y.
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Corre, Y.
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Diez, M.
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show more...
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Dubus, L.
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Firdaouss, M.
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Gerardin, J.
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Grosjean, A.
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Gunn, J. P.
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Krieger, K.
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Missirlian, M.
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Ratynskaia, Svet ...
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Reilhac, P.
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Richou, M.
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Rigollet, F.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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Nuclear Material ...
- By the university
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Royal Institute of Technology