Ioannis Tigelis

Ioannis Tigelis is Professor at the Department of Physics of the National and Kapodistrian University of Athens, specializing in high-power microwave sources and electromagnetic wave theory. His research contributes to nuclear fusion technology, particularly gyrotron development for plasma heating in tokamaks and stellarators. Publications focus on MW-class fusion gyrotrons, parasitic oscillation suppression, and industrial-scale vacuum electronics.

Research encompasses wave propagation in complex media, scattering phenomena, and applications in fusion devices like ITER and Wendelstein 7-X. Recent work advances second-harmonic gyrotron designs for EU-DEMO and addresses challenges in high-frequency power generation.