A 0.33-THz second-harmonic frequency-tunable gyrotron

Li Zheng-Di^{1, 2}, Du Chao-Hai³, Qi Xiang-Bo³, Luo Li^{1, 2}, Liu Pu-Kun^{3, †,}

Normalized power profiles of the axial modes from q = 1 to q = 3 under different magnetic fields: (a) B₀ = 6.022 T, (b) B₀ = 6.038 T, and (c) B₀ = 6.047 T.