First analysis of the misaligned leading edges of ITER-like plasma facing units using a very high resolution infrared camera in WEST

被引：22

作者：

Grosjean, A. ^{[1
]}

Corre, Y. ^{[1
]}

Dejarnac, R. ^{[2
]}

Gaspar, J. ^{[3
]}

Gunn, J. P. ^{[1
]}

Carpentier-Chouchana, S. ^{[4
]}

Courtois, X. ^{[1
]}

Delmas, E. ^{[1
]}

De Temmerman, G. ^{[4
]}

Diez, M. ^{[1
]}

Dubus, L. ^{[1
]}

Durocher, A. ^{[4
]}

Escourbiac, F. ^{[4
]}

Firdaouss, M. ^{[1
]}

Gerardin, J. ^{[2
]}

Houry, M. ^{[1
]}

Pitts, R. A. ^{[4
]}

Pocheau, C. ^{[1
]}

Tsitrone, E. ^{[1
]}

机构：

[1] CEA, IRFM, F-13108 St Paul Les Durance, France

[2] Czech Acad Sci, Inst Plasma Phys, Prague 18200, Czech Republic

[3] Aix Marseille Univ, CNRS, IUSTI, Marseille, France

[4] ITER Org, Route Vinon Verdon,CS 90 046, F-13067 St Paul Les Durance, France

来源：

NUCLEAR FUSION | 2020年 / 60卷 / 10期

关键词：

IR thermography; leading edge; plasma facing unit; heat load; very high resolution; WEST; ITER-like monoblocks; TUNGSTEN MONOBLOCKS; DIVERTOR; PHYSICS;

D O I：

10.1088/1741-4326/ab9fa6

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Twelve ITER-like plasma-facing units made of tungsten were exposed in the WEST tokamak divertor, with three plasma-facing units (PFUs) significantly overexposed to plasma heat flux: one sharp-edged PFU (vertical misalignment h = 0.8 mm) and two chamfered PFUs (h =0.6 mm and 0.3 mm, respectively). This paper describes the first temperature analysis obtained with a very high spatial resolution infrared camera (pixel size similar to 0.1 mm) on the misaligned PFU edges and shows the consistency obtained on the parallel heat flux derived from these measurements. The analysis is focused on the hottest areas of the PFU misaligned leading edges, since the temperature detection threshold of the VHR camera is high (T-threshold,T-BB 370 degrees C). The heat flux parallel to the magnetic field lines is assessed by matching the toroidal temperature profile in the vicinity of the leading edge with 3D finite element modelling. The tungsten emissivity assumed in this study is 0.6, which is consistent with laboratory measurements for damaged PFUs. For the three PFUs studied (with different vertical misalignments, incident angles, geometries), the derived parallel heat flux is similar, and consistent with independent measurements by a Fiber Bragg grating embedded in a graphite PFU at another toroidal location, giving confidence in future experiments using the same settings.

引用

页数：12

共 6 条

[1] First evidence of optical hot spots on ITER-like plasma facing units in the WEST tokamak
Diez, M.
Gunn, J. P.
Firdaouss, M.
Grosjean, A.
Corre, Y.
Delmas, E.
Gargiulo, L.
Tsitrone, E.
NUCLEAR FUSION, 2020, 60 (05)
[2] Plasma heat load in the toroidal gaps of the ITER-like plasma facing units in WEST tokamak
Tichit, Q.
Aumeunier, M. H.
Corre, Y.
Dejarnac, R.
Dubus, L.
Gaspar, J.
Gerardin, J.
Grosjean, A.
Gunn, J. P.
Juven, A.
Krieger, K.
Tsitrone, E.
NUCLEAR MATERIALS AND ENERGY, 2025, 42
[3] Tungsten covered graphite and copper elements and ITER-like actively cooled tungsten divertor plasma facing units for the WEST project
Guilhem, D.
Bucalossi, J.
Burles, S.
Corre, Y.
Ferlay, F.
Firdaouss, M.
Languille, P.
Lipa, M.
Martinez, A.
Missirlian, M.
Proust, M.
Richou, M.
Samaille, F.
Tsitrone, E.
PHYSICA SCRIPTA, 2016, T167
[4] Emissivity measurement of the ITER-like plasma facing components of the WEST phase 2: Pre-exposure measurements and first WEST exposure
Gaspar, J.
Rigollet, F.
Ehret, N.
Anquetin, Y.
Bernard, E.
Corre, Y.
Diez, M.
Firdaouss, M.
Houry, M.
Loarer, T.
Martin, C.
Missirlian, M.
Moreau, P.
Pocheau, C.
Reihlac, P.
Richou, M.
Tsitrone, E.
NUCLEAR MATERIALS AND ENERGY, 2022, 33
[5] First results and surface analysis strategy for plasma-facing components after JET operation with the ITER-like wall
Likonen, J.
Alves, E.
Baron-Wiechec, A.
Brezinsek, S.
Coad, J. P.
Hakola, A.
Heinola, K.
Koivuranta, S.
Matthews, G. F.
Petersson, P.
Rubel, M.
Stan-Sion, C.
Widdowson, A.
PHYSICA SCRIPTA, 2014, T159
[6] First plasma exposure of a pre-damaged ITER-like plasma-facing unit in the WEST tokamak: procedure for the PFU preparation and lessons learned
Richou, Marianne
Corre, Yann
Loewenhoff, Thorsten
Diez, Mathilde
Martin, Celine
Aretz, Anke
Coenen, Jann Willem
Firdaouss, Mehdi
Giacometti, Gregory
Grosjean, Alex
Pintsuk, Gerald
Roche, Helene
Spaehn, Michael
De Temmerman, Gregory
Tsitrone, Emmanuelle
Wirtz, Marius
NUCLEAR FUSION, 2022, 62 (05)

← 1 →