Effects of charge in heavy ions on solitary kinetic alfven waves in double-ion plasmas

After the charge of heavy ions is considered, a Sagdeev equation is obtained for the solitary kinetic Alfven waves (SKAWs) in a low-β (me/mp <<β<<1 or mp/me>>α>>1), three-component (electrons, protons, and highly charged heavy ions) plasma. Numerical results show that the charge number q of heavy ions can cause the width of the solitary structure to decrease, but increase for the maximum of electron density nem≤1.2 and the initial abundance of heavy ions Cb0≤0.1. The parallel phase speed of the waves increases with larger q. (authors)