The ELISe project, which is an integral part of the development of FAIR -Facility for Antiproton and IonResearch (FAIR, Darmstadt, Germany), is a project for developing the first accelerator in the world with colliding beams that uses the latest accelerator technology and experimental techniques. The ELISe experimental facility makes it possible to conduct a wide class of experiments using different nuclear reactions and thereby to study the diverse problems of nuclear physics and nuclear reactions. The experiments on electron scattering by nuclei far from the valley of stability will yield unique information on the distribution of charge in nuclei and the transitional density in nuclear excitations as well as single particle and cluster systems.Experiments with electron scattering by atomic nuclei have opened up large possibilities for studying the size and shape nuclei and internal nuclear dynamics [1]. However, up to now such studies have been limited to stable and long-lived isotopes. A theoretical analysis of electron scattering by exotic nuclei performed in recent years indicates that this method can be extended to nuclei far from the valley of stability [2][3][4][5][6][7]. The objective of the ELISe project is to apply this method to the study of unstable nuclei. The ELISe facilities will be a unique tool for making precise measurements of the distribution of the charge density and obtaining information on the shell structure and internal dynamics of exotic nuclei and on the mechanism of excitation of collective nuclear transitions in them. The experiments will make an enormous contribution to the diversity of high-quality data on nuclear matter that will become accessible in FAIR.The first technical proposal concerning a colliding beam accelerator complex was made at the Joint Institute for Nuclear Research (OIYaI) [8]. The ideas proposed were subsequently developed and included in the plan of the rare-isotope beam factory RKEN (Japan) as the MUSES project [9] and in the FAIR program as the ELISe project (Germany) [10][11][12]. However, neither project has been implemented thus far. During the coming years, a unique facility where electrons are scattered by exotic nuclei could appear in the ELISe project.Thirty-five institutes from 12 countries are participating in the ELISe project.
