Wave propagation and power deposition in blue-core helicon plasma

The wave propagation and power deposition inside outside the blue-core helicon plasma are computed, together with their transitional behaviours prior to after formation. Computations refer experiments on CSDX (controlled shear decorrelation experiment) (Thakur et al., Plasma Sources Science Technology 23: 044,006, 2014 Thakur IEEE Transactions 43: 2754–2759, 2015). It is found that radial profile of electric field peaks off-axis during formation, location this peak very close particle transport barrier observed in experiment; magnetic shows multiple modes column, which consistent experimental observation coherent high m through Bessel function. axial profiles indicate decay length shortens for increased external strength, especially when mode has been achieved, relatively longer core than outside. energy density overall lower two orders formation to, distribution a periodic boundary layer near edge column. dispersion relation column suggests presence modes, while it no variation, i.e. constant number changed frequency. appears be direction, forming hollow profile, formed structure direction. Analyses based step-like function theory introduced provide results more physics understanding. These details presented first time, helpful understanding mechanism phenomenon. equivalence optical fiber electromagnetic communication also explored, preliminary calculation total reflection can indeed occur if incident angle larger threshold value. This may inspire novel application plasma, one most interesting findings present work.