[2L09-10] Fusion Instruments Engineering, Fusion Neutronics, Fusion Reactor Systems

[2L10] Proposal of electromagnetic noise suppression and compensation in plasma heat flux monitering

*Hiroto Matsuura¹, Son Xuan Nhat Bui¹, Hideki Muraoka¹, Yosuke Nakashima², Shinsuke Ohshima³, Tohru Mizuuchi³ (1. OPU, 2. Univ. of Tsukuba, 3. Kyoto Univ.)

Keywords:divertor heat flux, thermocouple signal noise, Heat flux estimation model

We have developed time dependent heat flux estimation models, which solves inverse heat conduction problem and reproduces the temperature evolution of plasma irradiated target, and applied them to Heliotron J or GAMMA 10/PDX plasma. However, there is often electromagnetic noise during startup or lumpdown of confinement magnetic field coil current and during powerful injection of radio frequency electromagnetic wave for plasma heating. This makes it difficult to obtain relyable temperature signal of the sensor target. In this work, shielding effect of thermocouple wires and proposal to delete noise component from time trace of thermocouple data will be reported.