Experimental study and PIC-simulation for the PCM operation

The results of computer simulation for the PCM and the PCA operations are reported. The plasma annulus is considered to be cold, collisionless media (r
_p
= 0.9 cm, δ
_p
= 0.1 cm, L
_p
= 30 cm, R = 1.8 cm) with dielectric constant ε
_p
= (1 - ω
_p
²
/ω
²
). The microwave power must be amplified by REB is generated by the M-band magnetron: λ = 2.71 cm, P = 150 kW. The hollow high-current REB (γ = 2.2) is PIC-simulated for the case of its injection into the plasma annulus. The electromagnetic fields are resulted from the numerical solving of Maxwell equations. This simulation showed that there exists the microwave generation at the wavelength λ - 3 cm. Moreover, the generation wavelength decreases as the plasma density increases. The microwave power generated is of about tens megawatts for the REB current of 2 kA. The maximal efficiency is of about 5%. The excitation of the co-axial plasma waveguide by the external wave with microwave power of 100 kW leads to the increase in the output microwave power within narrow region of plasma density. This takes place if the the input frequency is coincident with the one of wave inherently generated. Also we present the experiment for the PCM operation and the preliminary experiment devoted to the PCA operation.