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

JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016)

doi:10.1088/1402-4896/aa8a14

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

JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016)

Laboratory for Plasma Physics

Research output: Contribution to journal › Conference article › peer-review

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 °C-1400 °C; W coating 700 °C-1370 °C; W bulk 700 °C-1400 °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.

Original language	English
Article number	014027
Journal	Physica Scripta
Volume	2017
Issue number	T170
DOIs	https://doi.org/10.1088/1402-4896/aa8a14
Publication status	Published - 1 Dec 2017
Event	16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017 - Neuss/Dusseldorf, Germany Duration: 16 May 2017 → 19 May 2017

Keywords

Hot spots
Image processing
Imaging diagnostics
JUVIL software
Real-time protection system

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10.1088/1402-4896/aa8a14

Cite this

JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016) (2017). The near infrared imaging system for the real-time protection of the JET ITER-like wall. Physica Scripta, 2017(T170), Article 014027. https://doi.org/10.1088/1402-4896/aa8a14

JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016). / The near infrared imaging system for the real-time protection of the JET ITER-like wall. In: Physica Scripta. 2017 ; Vol. 2017, No. T170.

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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 °C-1400 °C; W coating 700 °C-1370 °C; W bulk 700 °C-1400 °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 = "Hot spots, Image processing, Imaging diagnostics, JUVIL software, Real-time protection system",

author = "{JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016)} and 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 Zastrow, {K. D.}",

note = "Publisher Copyright: {\textcopyright} 2017 Forschungszentrum J{\"u}lich.; 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017 ; Conference date: 16-05-2017 Through 19-05-2017",

year = "2017",

month = dec,

day = "1",

doi = "10.1088/1402-4896/aa8a14",

language = "English",

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journal = "Physica Scripta",

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JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016) 2017, 'The near infrared imaging system for the real-time protection of the JET ITER-like wall', Physica Scripta, vol. 2017, no. T170, 014027. https://doi.org/10.1088/1402-4896/aa8a14

The near infrared imaging system for the real-time protection of the JET ITER-like wall. / JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016).
In: Physica Scripta, Vol. 2017, No. T170, 014027, 01.12.2017.

Research output: Contribution to journal › Conference article › peer-review

TY - JOUR

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

AU - JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 Octobe

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.

PY - 2017/12/1

Y1 - 2017/12/1

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 °C-1400 °C; W coating 700 °C-1370 °C; W bulk 700 °C-1400 °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 °C-1400 °C; W coating 700 °C-1370 °C; W bulk 700 °C-1400 °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 - Hot spots

KW - Image processing

KW - Imaging diagnostics

KW - JUVIL software

KW - Real-time protection system

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U2 - 10.1088/1402-4896/aa8a14

DO - 10.1088/1402-4896/aa8a14

M3 - Conference article

AN - SCOPUS:85059702427

SN - 0031-8949

VL - 2017

JO - Physica Scripta

JF - Physica Scripta

IS - T170

M1 - 014027

T2 - 16th International Conference on Plasma-Facing Materials and Components for Fusion Applications, PFMC 2017

Y2 - 16 May 2017 through 19 May 2017

ER -

JET contributors1111 See the author list of 'Overview of the JET results in support to ITER' by X Litaudon et al to be published in Nucl. Fusion special issue: overview and summary reports from the 26th Fusion Energy Conference (Kyoto, Japan, 17-22 October 2016). The near infrared imaging system for the real-time protection of the JET ITER-like wall. Physica Scripta. 2017 Dec 1;2017(T170):014027. doi: 10.1088/1402-4896/aa8a14

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

Abstract

Keywords

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