Radially polarized terahertz vorticity induced by twisted Azimuthal Wiggler magnetic fieldBahareh Alsadat Ebrahimipour, Hassan Sobhani, Mehdi Zamani and Hadi NooriEur. Phys. J. Plus, 137 7 (2022) 873DOI: https://doi.org/10.1140/epjp/s13360-022-03011-z