The description and bench test results of the developed universal experimental facility [1] are presented. It mounted at the direct beam line of IHEPNP NSC KIPT 30 MeV Linac for the fundamental and applied research of high energy electron interaction with amorphous and single-crystal structures. The universal facility consists of the following structural elements and systems: electron beam transportation system; electron beam parameters formation and measurement, secondary electron emission monitor (SEM); electron beam full absorption Faraday cups (FC), collimators, goniometrical device system and magnetic energy analyzer.

The integral yields of secondary low-energy electrons (with energies up to 50 eV) in the interaction of primary electrons 10…30 MeV with 50 μm aluminum foil have been studied. It is shown that the proposed method for approximating the spectra of low-energy electron emission in the measured part of the spectrum (E > 4.2 eV) makes it possible to obtain data on the absolute values of the spectra of electrons emitted from the target. It has been established that the spectra of secondary low-energy electrons, depending on the energy of primary electrons, have a maximum in the range of 1.3…1.6 eV, and the FWHM values are in the range of 2.7…3.8 eV.

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The development of low currents measuring channel necessary to ensure the operation of the experimental complex based on a linear electron accelerator with energy of 30 MeV at IHEPNP NSC KIPT for fundamental and applied research on the interaction of high-energy electrons with amorphous and single-crystal structures is described. The channel makes it possible to measure currents of the order of 0.1 nA and less, with an accuracy better than 0.1 %, and is connected to an upper-level computer via the USB interface.