The properties of supershort avalanche electron beams (SAEB) generated in inhomogeneous electric field at high pressure of different gases and high temporal resolution (up to ~ 80 ps) are investigated. SAEB was obtained in helium at a pressure of about 12 atm, in nitrogen at a pressure of about 5 atm, in xenon and sulfur hexafluoride at a pressure of about 2 atm. It was revealed that at SAEB generation the scattering angle of SAEB flow exceeds 2π sr. The modes of SAEB generation, at which SAEB current pulse has two maxima were revealed. It was shown that in order to generate electrons with "anomalous" energy, the cathodes with big radius of curvature should be used. It was revealed that the mode of SAEB generation in the inhomogeneous electric field is realized at lower voltages across a gap as compared to the homogeneous one.
super-short avalanche electron beam, escaping electrons, nanosecond discharge