Observation of divertor and core radiation in JT-60U by means of bolometric imaging

摘要

An imaging bolometer has been realized for the first time on a tokamak (JT-60U). The imaging bolometer utilizes a 7 cm x 9 cm x 2.5 mu m gold foil and an Omega/Micron infrared (IR) camera by Indigo/FLIR (128 x 164 pixels, 70 mK, 30 fps). The imaging bolometer has an array of 12 (toroidal) x 16 (poloidal) (192 in total) channels, a noise equivalent power density of greater than 350 mu W/cm(2) and a frame rate of 30 fps. The field of view of the imaging bolometer is semi-tangential covering the divertor for more than 100 degrees toroidally in addition to the entire poloidal cross-section. The data clearly shows examples of the radiation changing from strong divertor radiation to core dominated radiation in agreement with the resistive bolometer data. (c) 2007 Elsevier B.V. All rights reserved.