ICRF Plasma Production with Hydrogen Minority Heating in Uragan-2M and Large Helical Device

This report compares results ion-cyclotron range of frequencies (ICRF) plasma production at hydrogen minority regime in Uragan-2M (U-2M) and Large Helical Device (LHD). The condition the presence fundamental harmonic ion cyclotron resonance zone for inside column should be fulfilled this method. scenario is successful both machines weakly sensitive to variation concentration H2+He gas mixture. It noted that LHD start up slower than U-2M. comparison ICRF with U-2M indicate can scaled larger stellarator devices. experiments made are base proposal usage Wendelstein 7-X magnetic field reduced 1.7 T.