This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1088/1402-4896/aa8a14 in citations.
The near infrared imaging system for the real-time protection of the JET ITER-like wall
The near infrared imaging system for the real-time protection of the JET ITER-like wall
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 tangent...
Saved in:
Personal Name(s): | Kinna, D. |
---|---|
Huber, V. / Arnoux, G. / Balboa, I. / Balorin, C. / Carman, P. / Carvalho, P. / Collins, S. / Conway, N. / McCullen, P. / Jachmich, S. / Jouve, M. / Linsmeier, Ch / Lomanowski, B. / Lomas, P. J. / Lowry, C. G. / Maggi, C. F. / Matthews, G. F. / May-Smith, T. / Meigs, A. / Mertens, Philippe / Nunes, I. / Price, M. / Puglia, P. / Riccardo, V. / Rimini, F. G. / Sergienko, G. / Tsalas, M. / Zastrow, K-D / Huber, Alexander (Corresponding author) | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Physica scripta, T170 (2017) S. 014027 |
Imprint: |
Bristol
IoP Publ.
2017
|
DOI: |
10.1088/1402-4896/aa8a14 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Publikationsportal JuSER |
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. |