Foilless injection of reb into a dense plasma

The preliminary experiments on a foilless injection of high-current REB generated from magnetically-insulated diode into a dense plasma are discussed. It is shown that because of low scattering angle of the injected beam the strong Langmuir turbulence is observed even at plasma density 2 10¹⁶ cm⁻³. The REB-plasma interaction efficiency in the case of toilless injection is much higher than in the case when a vacuum diode with anode foil is used. The typical parameters of the REB are: Ud∼0.6 MeV, jb∼1–10kA/cm², tb∼ 100–200 ns. The scattering angle of the beam, estimated from indirect experiments is 4°–5°. The optimum choice of the toilless diode geometry made it possible to inject the REB with a total current up to six times higher than the vacuum current for this diode geometry.