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We performed measurements of plasma density in a “point-like” discharge, which is generated in a nonuniform flow of a gas (argon) under the action of high-power terahertz gyrotron radiation with a frequency of 0.67 THz, a power of 40 kW, and a pulse duration of 20 μs. The nonuniform flow was produced by injecting the gas to the vacuum chamber through a small hole (0.14 mm in diameter) under a background...
We present the first results of studying a pulsed (20 μs) discharge in nitrogen, which is produced by high-power (40 kW) focused beam of terahertz (0.67 THz) waves. The time dynamics of the discharge plasma glowing is studied in a wide range of wavelengths (300–650 nm) and gas pressures (0.5–350 Torr). An assumption is made about the determining role of long-living metastables of nitrogen N2 (A3Σu...
Results of experimental tests of a high-power sub-terahertz gyrotron with a pulse solenoid are presented. The operating frequency corresponds to the atmospheric transparency window (0.66–0.67 THz). The output power up to 200 kW in single 50 microsecond pulses was obtained. The 0.3THz/0.5 MW tube is under experimental tests. Gas discharges have been realized in a wide range of pressures (0.01–1500...
The main results of the IAP RAS activity at the powerful pulse THz gyrotrons are presented. The power about 200 kW at the frequency of 0.67 THz in single impulses with durations of 30 microseconds has been reached. This gyrotron is successfully used to initiate localized (characteristic size in the order about 1 mm) discharge in gases. The models describing the dynamics of discharge initiated by THz...
Results of the experimental investigation of the gas discharge in the beams of the powerful terahertz radiation are presented. Study of the self-sustained and initiated discharges by using the radiation of one of the two pulsed gyrotrons (developed in IAP RAS) with frequency values of 0.55 THz@1kW (8 μβ pulse length) and 0.67 THz@100kW (20 μβ) was made in the wide range of pressures (0.01–1500 Torr)...
Results of the experimental investigation of the gas discharge in the beams of the powerful terahertz radiation are presented. Study of the self-sustained and initiated discharges by using the radiation of one of the two pulsed gyrotrons (developed in IAP RAS) with frequency values of 0.55 THz@1kW (8 μs pulse length) and 0.67 THz@100kW (20 μs) was made in the wide range of pressures (0.01–1500 Torr)...
Possibility to build airplane autonomous power supply system based on asynchronous generator is considered. Use of semiconductor current inverter for driving the asynchronous generator together with voltage stabilization for various rotor rotation velocity and with compensation of generator voltage distortions caused by nonlinearity or nonsymmetry of load represent an innovative solution. Autonomous...
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