Selective Heating of Helium Ion in Magnetized Sheet Plasma

Ion cyclotron resonance heating in the magnetized sheet plasma is studied experimentally in a linear plasma device, TPD-SheetIV. We have demonstrated the ICRH of the helium or helium/hydrogen mixture sheet plasma by the RF electrodes of two parallel plates, sandwiching the sheet plasma. Measurements of the ion temperature in the plasma were carried out by a Faraday cup. In addition, the ion densities in the plasma were measured by an omegatron mass analyzer. The resonance frequencies fRF is slightly higher than the ion cyclotron frequency of helium fci. The ion densities Ni of He rapidly decreases with increasing the PRF, although H and H2 gradually decrease.