Fast thermography for HT-7U superconducting tokamak

A 30 channel fast IR pyrometry array has been proposed for HT-7U superconducting tokamak, which has a 0.5 μs time response, a 10 mm diameter spatial resolution and a 5°C temperature resolution. The temperature range is from 250°C to 1200°C. The two dimensional temperature profiles of the first wall during both major and minor disruptions could be measured with an accuracy of about 1% of measuring temperature, which is adequate for tokamak experiments. This offers a very useful tool for disruption study, especially for the research of divertor physics and edge heat flux on HT-7U superconducting tokamak.