Measurement of Radiated Power Using an InfraRed Imaging Video Bolometer System in the Upstream of GAMMA 10/PDX Divertor Simulation Plasma*)

Plasma radiation intensity distribution plays a crucial role in the energy balance and impurity transport during plasma detachment. An InfraRed imaging Video Bolometer (IRVB) is a radiation distribution measurement system, that uses an infrared camera to measure the temperature distribution on a thin foil caused by plasma radiation. Herein, an IRVB measurement system is installed in the west plug/barrier cell of the GAMMA 10/PDX, which is upstream of the divertor-simulated plasma. In the case of Ar injection, a clear difference is observed in the plasma radiation intensity depending on the incident gas pressure. However, during Ne injection, the difference in the plasma radiation intensity is not clear. Compared with the case of Ne, the radiation intensity is higher when Ar gas was injected.