Articles techniques et présentations

Fusion devices (tokamaks, stellarators) require hundreds of millions degree Celsius temperature to reach the plasma state when the fusion reactions start to occur. Ion cyclotron resonance heating (ICRH) is a method of energy transfer to the ions in the plasma from electromagnetic radiation having a frequency equal to the ion cyclotron motion frequency in the presence of a magnetic field. Studies of interactions between ion cyclotron range of frequency (ICRF) radiation and plasma in a configuration representative of a tokamak edge region are carried out on a specialized linear device IShTAR (Ion cyclotron Sheath Test ARrangement). The presented simulation work intends to support the experimental studies performed on IShTAR. The electromagnetic field distribution inside the vessel is modeled. Different tasks are addressed, including power losses through the use of a manually prescribed perfectly matched layer, diagnostics calibration, impedance matching tests, and achievement of coupling conditions equal to experimental and studying the effect of a metallic probe presence inside the plasma.