This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1016/j.fusengdes.2008.11.055 in citations.
A bulk tungsten divertor row for the outer strike point in JET
A bulk tungsten divertor row for the outer strike point in JET
In the frame of the ITER-like wall project, a new row of divertor tiles has been developed which consists of 96 bulk tungsten load-bearing septum replacement plates (LB-SRP). Exposed to the outer strike point for most ITER-relevant, high triangularity configurations, they shall be subject to high po...
Saved in:
Personal Name(s): | Mertens, Ph. |
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Altmann, H. / Hirai, T. / Knaup, M. / Neubauer, O. / Philipps, V. / Rapp, J. / Riccardo, V. / Sadakov, S. / Schweer, B. / Terra, A. / Uytdenhouwen, I. / Samm, U. | |
Contributing Institute: |
Plasmaphysik; IEF-4 JARA-ENERGY; JARA-ENERGY |
Published in: | Fusion engineering and design, 84 (2009) |
Imprint: |
New York, NY [u.a.]
Elsevier
2009
|
DOI: |
10.1016/j.fusengdes.2008.11.055 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Fusion Engineering and Design
84 |
Subject (ZB): | |
Publikationsportal JuSER |
In the frame of the ITER-like wall project, a new row of divertor tiles has been developed which consists of 96 bulk tungsten load-bearing septum replacement plates (LB-SRP). Exposed to the outer strike point for most ITER-relevant, high triangularity configurations, they shall be subject to high power loads (locally 10 MW/m(2) and above). These conditions are demanding, particularly for an inertially cooled design as prescribed. The expected erosion rates are high as well as the risk of melting. especially with transients and repetitive ELM loads. The development is also a real challenge with respect to the inevitable excursions of the tungsten material through the so-called DBTT, ductile-to-brittle transition temperature.A lamella design has been selected to fulfil the requirements with respect to the thermo-mechanical and electromagnetic loads during disruptions (partial derivative T/partial derivative z <= 5 x 10(4) K/m vertically, induction rate of change partial derivative B/partial derivative t <= 100T/s, and I-halo <= 18 kA/module). Care is taken to act on refractory metals solely with compressive forces to a large extent. The dedicated clamping concept is described. Results of a test exposure to an electron beam around 70 MJ/m(2) substantiate the resort to 'high temperature' materials like - among others - high-grade Nimonic (R) alloys, molybdenum or ceramic coatings. (C) 2009 Published by Elsevier B.V |