[en] A project of Electron Ring Ionizer ERIS (Electron Ring Ion Source) in JINR is submitted. The electron accelerator SILUND-20 and the adgezator (compressor) KUTI-20 after reconstruction have been taken as a basis to create ERIS setup. Some designs of the adgezator were reconstructed to reduce the ring radius up to 2 cm and increase the electron ring time confinement till 60+100 ms. The ERIS ionizer is supposed to investigate the electron shells of highly charged ions with X-ray spectroscopy methods. It is equipped with a compact crystal diffraction spectrometer of high resolution. According to the calculation it is possible to ensure the ionization factor jτ=0.5x10²² cm^-2 in the ERIS electron rings and obtain the high charge states of ions (Xe⁴⁸⁺, Kr³⁴⁺) with a number up to 10¹⁰ ions in one ring. The results of the first stage of this project and spectra of K_α and K_β X-rays of Kr and Xe ions from electron rings are presented in this communication. 9 refs.; 6 figs