The near infrared imaging system for the real-time protection of the JET ITER-like wall

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The near infrared imaging system for the real-time protection of the JET ITER-like wall. / JET Contributors.

julkaisussa: Physica Scripta, Vuosikerta T170, 014027, 12.2017.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Bibtex - Lataa

@article{ecc5822a59e443dcba1ea2ab4634fed6,
title = "The near infrared imaging system for the real-time protection of the JET ITER-like wall",
abstract = "This paper describes the design, implementation and operation of the near infrared (NIR) imaging diagnostic system of the JET ITER-like wall (JET-ILW) plasma experiment and its integration into the existing JET protection architecture. The imaging system comprises four wide-angle views, four tangential divertor views, and two top views of the divertor covering 66{\%} of the first wall and up to 43{\%} of the divertor. The operation temperature ranges which must be observed by the NIR protection cameras are, for the materials used on JET: Be 700 degrees C-1400 degrees C; W coating 700 degrees C-1370 degrees C; W bulk 700 degrees C-1400 degrees C. The Real-Time Protection system operates routinely since 2011 and successfully demonstrated its capability to avoid the overheating of the main chamber beryllium wall as well as of the divertor W and W-coated carbon fibre composite (CFC) tiles. During this period, less than 0.5{\%} of the terminated discharges were aborted by a malfunction of the system. About 2{\%}-3{\%} of the discharges were terminated due to the detection of actual hot spots.",
keywords = "imaging diagnostics, real-time protection system, hot spots, JUVIL software, image processing, COATINGS",
author = "A. Huber and D. Kinna and V. Huber and G. Arnoux and I. Balboa and C. Balorin and P. Carman and P. Carvalho and S. Collins and N. Conway and P. McCullen and S. Jachmich and M. Jouve and Ch Linsmeier and B. Lomanowski and Lomas, {P. J.} and Lowry, {C. G.} and Maggi, {C. F.} and Matthews, {G. F.} and T. May-Smith and A. Meigs and Ph Mertens and I. Nunes and M. Price and P. Puglia and V. Riccardo and Rimini, {F. G.} and G. Sergienko and M. Tsalas and K-D Zastrow and {JET Contributors}",
year = "2017",
month = "12",
doi = "10.1088/1402-4896/aa8a14",
language = "English",
volume = "T170",
journal = "Physica Scripta",
issn = "0031-8949",

}

RIS - Lataa

TY - JOUR

T1 - The near infrared imaging system for the real-time protection of the JET ITER-like wall

AU - Huber, A.

AU - Kinna, D.

AU - Huber, V.

AU - Arnoux, G.

AU - Balboa, I.

AU - Balorin, C.

AU - Carman, P.

AU - Carvalho, P.

AU - Collins, S.

AU - Conway, N.

AU - McCullen, P.

AU - Jachmich, S.

AU - Jouve, M.

AU - Linsmeier, Ch

AU - Lomanowski, B.

AU - Lomas, P. J.

AU - Lowry, C. G.

AU - Maggi, C. F.

AU - Matthews, G. F.

AU - May-Smith, T.

AU - Meigs, A.

AU - Mertens, Ph

AU - Nunes, I.

AU - Price, M.

AU - Puglia, P.

AU - Riccardo, V.

AU - Rimini, F. G.

AU - Sergienko, G.

AU - Tsalas, M.

AU - Zastrow, K-D

AU - JET Contributors

PY - 2017/12

Y1 - 2017/12

N2 - This paper describes the design, implementation and operation of the near infrared (NIR) imaging diagnostic system of the JET ITER-like wall (JET-ILW) plasma experiment and its integration into the existing JET protection architecture. The imaging system comprises four wide-angle views, four tangential divertor views, and two top views of the divertor covering 66% of the first wall and up to 43% of the divertor. The operation temperature ranges which must be observed by the NIR protection cameras are, for the materials used on JET: Be 700 degrees C-1400 degrees C; W coating 700 degrees C-1370 degrees C; W bulk 700 degrees C-1400 degrees C. The Real-Time Protection system operates routinely since 2011 and successfully demonstrated its capability to avoid the overheating of the main chamber beryllium wall as well as of the divertor W and W-coated carbon fibre composite (CFC) tiles. During this period, less than 0.5% of the terminated discharges were aborted by a malfunction of the system. About 2%-3% of the discharges were terminated due to the detection of actual hot spots.

AB - This paper describes the design, implementation and operation of the near infrared (NIR) imaging diagnostic system of the JET ITER-like wall (JET-ILW) plasma experiment and its integration into the existing JET protection architecture. The imaging system comprises four wide-angle views, four tangential divertor views, and two top views of the divertor covering 66% of the first wall and up to 43% of the divertor. The operation temperature ranges which must be observed by the NIR protection cameras are, for the materials used on JET: Be 700 degrees C-1400 degrees C; W coating 700 degrees C-1370 degrees C; W bulk 700 degrees C-1400 degrees C. The Real-Time Protection system operates routinely since 2011 and successfully demonstrated its capability to avoid the overheating of the main chamber beryllium wall as well as of the divertor W and W-coated carbon fibre composite (CFC) tiles. During this period, less than 0.5% of the terminated discharges were aborted by a malfunction of the system. About 2%-3% of the discharges were terminated due to the detection of actual hot spots.

KW - imaging diagnostics

KW - real-time protection system

KW - hot spots

KW - JUVIL software

KW - image processing

KW - COATINGS

U2 - 10.1088/1402-4896/aa8a14

DO - 10.1088/1402-4896/aa8a14

M3 - Article

VL - T170

JO - Physica Scripta

JF - Physica Scripta

SN - 0031-8949

M1 - 014027

ER -

ID: 16962327