This article describes S-band sources of high-power microwave
(HPM) pulses: a resonant backward wave oscillator (BWO) producing
∼5-GW, 100-J pulses, based on the SINUS-7 electron accelerator,
and a double-section vircator with a peak power of ∼1 GW
and a pulse width of 20–50 ns, powered from either the
SINUS-7 accelerator or the MARINA inductive-store pulse driver
with a fuse opening switch.