Plasma Heating and Acceleration by Strong Magnetosonic Waves Propagating Obliquely to a Magnetostatic Field

The behavior of strong magnetosonic waves with $\omega >{\omega }_{\mathrm{ci}}$ (${\omega }_{\mathrm{ci}}=\frac{q_{i}B}{m_{i}c}$) is investigated in oblique propagation with particle simulation. Strong ion and electron heatings versus the angle [$\theta =(\overrightarrow{\mathrm{k}},{\overrightarrow{\mathrm{B}}}_0)$] are found for $\theta <90\mathrm{}$°. Ion heating peaks at a particular angle but disappears below a critical angle ${\theta }_{t_i}$; electron heating sets in below a second critical angle ${\theta }_{t_e}$. The phenomena exhibit unexpected structure with $\theta$.