Multichannel and multicolour infrared thermography in Tore Supra
An imaging spectrometer using a sapphire prism as dispersing element has been conceived at Tore Supra for the spectral range of 1 - 4Mu m. It measures simultaneously at various wavelengths the temperature on distributed high heat-flux elements under plasma impact with 36 optical fibres, 4 of which are ZrF(4) fibres. It employs an InSb focal plane array detector (256x320 pixels) behind a silicon filter and a ZnS window yielding a dynamic range of 200 to 1500°C with 20ms temporal resolution. The fibre transmission and the spatial variation of gain and background of the camera are calibrated using a light source with integrating sphere. With a black body source one determines the non linearity of the average gain and controls its stability during operation. The spectral dispersion of about 30nm/pixel is determined with interference filters and controlled with a spectral lamp. The measurements at various wavelengths allow to determine the temperature distribution in the field of view.
Bibliographic Reference: An oral paper given at: 15th Topical Conference on High-Temperature Plasma Diagnostics Organised by: General Atomics, San Diego (US) Held at: Hyatt Regency Islandia Hotel, San Diego(US)
Availability: Available from Association EURATOM-CEA, Département de Recherches sur la Fusion Contrôlée, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: email@example.com
Record Number: 200417509 / Last updated on: 2004-05-10
Original language: en
Available languages: en