Reflection and Evolution of Torsional Alfvén Pulses in Zero-beta Flux Tubes

Abstract We model the behavior of a torsional Alfvén pulse, assumed to propagate through chromosphere. Building on our existing model, we utilize zero-beta approximation appropriate for plasma in an intense magnetic flux tube, e.g., bright point. The is adapted investigate connection between these features and chromospheric spicules. A pulse introduced at lower, photospheric boundary tube as shear perturbation, resulting propagating waves are reflected from upper boundary, representing change density found transition region. induced upward mass followed by reversal that may be identified with rising falling certain lower solar atmospheric jets. ratio transmitted estimated compared relative total spicules wind. An example used study properties pulse. also find interaction initial create localized flow persists independently itself.