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The ITEP-TWAC is a new heavy ion accumulator facility under construction at ITEP in Moscow [B. Sharkov et al., Nucl. Instr. Meth. A415, 20(1998)]. The TWAC project directs on development and promotion of high intensity and high power heavy ion beam technology. The main goal of the TWAC project is accumulation in the storage ring of intense ion beam, its longitudinal compression and using the extracted beam for plasma experiments. An electron cooler with electron energy of 380 keV provides a small ion bunch size during charge-exchange injection into the U10 accumulator ring [I. Meshkov et al., Design project of electron cooling system for TWAC accumulator ring (Dubna, 2001)]. The cooling time is compared with the storage time during charge-exchange multi-turn injection. The electron cooler allows us to significantly improve the beam parameters at the target (specific energy, specific power and so on) and to suppress the beam losses by an order of magnitude. The application of electron cooling allows an increase in of the final power of an extracted ion beam on a target by a factor 2-3.

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The DELSY (Dubna Electron Synchrotron) project is under development at the Joint Institute for Nuclear Research [Arkhipov et al. (2001). Nucl. Instrum. Methods, A467, 57-62; Arkhipov et al. (2001). Nucl. Instrum. Methods, A470, 1-6; Titkova et al. (2000). Proceedings of the Seventh European Particle Accelerator Conference, pp. 702-704]. It is based on an acceleration facility donated to the Joint Institute for Nuclear Research by the Institute for Nuclear and High Energy Physics (NIKHEF, Amsterdam). The NIKHEF accelerator facility consists of the linear electron accelerator MEA, which has an electron energy of 700 MeV, and the electron storage ring AmPS, with a maximum energy of 900 MeV and a beam current of 200 mA. There are three phases to the construction of the DELSY facility. Phase I will be accomplished with the construction of a complex of free-electron lasers covering continuously the spectrum from the far infrared down to the ultraviolet ( approximately 150 nm). Phase II will be accomplished with the commissioning of the storage ring DELSY. Complete commissioning of the DELSY project will take place after finishing Phase III, the construction of an X-ray free-electron laser. This phase is considered as the ultimate goal of the project; it is currently under development and is not described in this paper.