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Superradiance (SR) of electron bunches can be considered as an effective method of production of ultrashort electromagnetic (em) pulses [1]. Different types of SR associated with different mechanisms (cyclotron, Cherenkov, bremsstrahlung) of stimulated emission have been observed experimentally in the millimeter and centimeter wavelength bands. Progress in this research has enabled a new type of generator...
Microwave pulse compression has applications in radar technology and plasma diagnostics. The pulse compressor requires a dispersion curve with a monotonic group velocity and low losses in a reasonable wide frequency band. It can be achieved by the helically corrugated waveguide (HCW) [1–3] with both axial and azimuthal periodicity that couples modes in the circular waveguide to generate new operating...
A gyrotron traveling wave amplifier (gyro-TWA) with a cusp electron gun and a helically corrugated waveguide operating in the W-band is presented. The large orbit electron beam from the cusp gun interacts resonantly with an ideal eigenwave existing in the interaction region based on the cyclotron resonance maser instability. When driven by the electron beam of energy 40 keV and current 1.5 A, the...
Gyro-amplifiers have potential as the high frequency RF drivers for particle accelerators. They require relativistic electron beams with low velocity spread and with a high fraction of the electron energy associated with the cyclotron motion. For harmonic operation and mode control an axis-encircling beam is desirable. The passage of an electron beam through a non-adiabatic magnetic field reversal...
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