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

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

Abstrakti

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.

AlkuperäiskieliEnglanti
Artikkeli014027
Sivumäärä7
JulkaisuPhysica Scripta
VuosikertaT170
DOI - pysyväislinkit
TilaJulkaistu - joulukuuta 2017
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu
TapahtumaInternational Conference on Plasma-Facing Materials and Components for Fusion Applications - Düsseldorf, Saksa
Kesto: 16 toukokuuta 201719 toukokuuta 2017
Konferenssinumero: 16

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