The project "Dubna Electron Synchrotron" (DELSY) is aimed to construct a synchrotron radiation source of the third generation at the Joint Institute for Nuclear Research. The DELSY synchrotron radiation source will be constructed on the base of the accelerator facility of the Institute for Nuclear Physics and High Energy Physics (NIKHEF), Amsterdam, The Netherlands. This accelerator facility consists of a linear electron accelerator Medium Energy Accelerator (MEA) for an electron energy of 700 MeV and the electron storage ring Amsterdam Pulse Stretcher (AmPS) for the maximum electron energy of 900 MeV at a circulating beam current of 200 mA. The DELSY storage ring is supposed to be constructed with the use of the AmPS (PAC, Chicago, 1989) storage ring, the focusing system of which will be essentially modified: the ring circumference will be approximately 1.5 times smaller, the electron energy will be increased up to 1.2 GeV and the focusing strength will be enhanced. These measures will allow one to obtain a beam emittance at least ten times smaller which subsequently increases the synchrotron radiation brilliance by several orders of magnitude. The rigging of the DELSY ring with the insertion devices—the superconducting wiggler with a magnetic field of 10 T and the so-called "vacuum hybrid miniundulator" is the principal feature of the new synchrotron radiation source. Both devices developed by Budker INP, Novosibirsk, will allow one to enrich the characteristics of DELSY as a synchrotron radiation source, expanding its radiation spectrum in the region of the hard X-rays and increasing its brilliance up to 3×10 18 photons/s/mm 2/mrad 2/0.1% b.w. Now this facility is being dismounted and transferred to JINR.