Ion heating and high-energy-particle production by ion-cyclotron heating in the large helical device

Ion-cyclotron heating was applied to the Large Helical Device. When the proton-cyclotron resonance was near the saddle point of the magnetic field-strength plane, strong ion-cyclotron damping occurred. Under these conditions efficient plasma heating was achieved for more than one minute. A high-energy ion tail was observed, and the effective tail temperature was determined by a balance between the wave acceleration and the electron-drag relaxation. There was no apparent sign of particle orbit loss effect in the investigated density range of 0.8-1.3x10(19) m(-3).     

Microwave diagnostics of chemical ozone destruction in the arctic stratosphere

Chemical destruction of ozone was diagnosed on the basis of long-term microwave observations of the ozone evolution in the stratosphere above the Kola Peninsula in winters of 2002–2003 and 2004–2005. We present a method for calculating the total ozone loss at the end of winter and the beginning of spring with allowance for nondiabatic lowering of the air masses. The obtained results are compared with other measurement data.