Yakovenko, S.

Paper	Title	Page
WECOB01	Methods for Optimization of the Dynamics of the Storage of Positrons in the Surko Trap	81
	M. K. Eseev, A. G. Kobets, I. N. Meshkov, A. Yu. Rudakov, S. Yakovenko JINR, Dubna, Moscow Region
	Surko traps are used successfully, example, for the accumulation of positrons and antiprotons in the experiments on the generation of antihydrogen atoms the ALPHA/CERN. The report presents methods for optimizing the dynamics of the storage of positrons in the Surko trap based on experimental studies on the trap the facility LEPTA/JINR and theoretical estimates of the accumulation and dynamics of particles with technique "Rotating Wall".
	Slides
TUPS09	LEPTA Project: Towards Positrons	111
	A. G. Kobets, E. V. Ahmanova, V. I. Lokhmatov, V. N. Malakhov, V. Pavlov, A. Yu. Rudakov, A. A. Sidorin, S. Yakovenko JINR, Dubna, Moscow Region M. K. Eseev NAFU, Arkhangelsk
	The Low Energy Positron Toroidal Accumulator (LEPTA) at JINR is under commissioning with circulating positron beam. The LEPTA facility is a small positron storage ring equipped with the electron cooling system and positron injector. The maximum positron energy is of 10 keV. The main goal of the project is generation of intensive flux of Positronium (Ps) atoms - the bound state of electron and positron, and setting up experiments on Ps in-flight. The report presents an advance in the project: up-grade of LEPTA ring magnetic system, status of the commissioning of positron transfer channel, the results of the electron cooling system tests, results of low energy positrons storage positron beam formation using Na22 radioactive positron source of radioactivity of 25 mCi.
TUPS13	Electron Cooler for NICA Collider	125
	S. Yakovenko, E. V. Ahmanova, A. G. Kobets, I. N. Meshkov, R. Pivin, A. Yu. Rudakov, A. V. Smirnov, N. D. Topilin, Yu. A. Tumanova JINR, Dubna, Moscow Region A. A. Filippov Allrussian Electrotechnical Institute, Moskow A. V. Shabunov JINR/VBLHEP, Moscow
	The electron cooling system at electron energy up to 2.5 MeV for the NICA collider is under design at JINR. The electron cooler is developed according to the available world practice of similar systems manufacturing. The main peculiarity of the electron cooler for the NICA collider is using of two cooling electron beams (one electron beam per each ring of the collider) that never has been done before. The acceleration and deceleration of the electron beams is produced by common high-voltage generator. The conceptual design of the electron cooling system has been developed. The cooler consist of three tanks. Two of them contain acceleration/deceleration tubes and are immersed in superconducting solenoids. The third one contains HV generator, which design is based on voltage multiplying scheme
TUPS02	Booster Electron Cooling System of NICA Project
	A. Yu. Rudakov, E. V. Ahmanova, I. N. Meshkov, R. Pivin, V. I. Shokin, A. O. Sidorin, A. V. Smirnov, N. D. Topilin, Yu. A. Tumanova, S. Yakovenko JINR, Dubna, Moscow Region A. V. Ivanov BINP SB RAS, Novosibirsk A. V. Shabunov JINR/VBLHEP, Moscow
	Nuclotron-based Ion Collider fAcility (NICA) is the new accelerator complex being constructed at the JINR. It includes the injection complex, existing superconducting proton synchrotron "Nuclotron", and the new superconducting proton synchrotrons – the Booster and the Collider. We plan to use in the NICA several cooling systems: electron cooling for the Booster and for the Collider, and stochastic cooling for the Collider. The Booster electron cooling system is designed for the electron energy range of 1.5 – 60 keV and maximum current of 1.0 A. The elements of electron cooling system (electron gun, collector, power supply system) will be tested at the test-bench "Recuperator" at the JINR. In the report the design and the basic parameters of the Booster electron cooling system are presented.