• Y.Budagov, Y.Denisov, I.Meshkov, A.Sissakian, G.Shirkov and G.Trubnikov
  Joint Institute for Nuclear Research, Dubna, Russia

JINR actively participates in new international mega-project ILC. JINR physicists are planning to take part in several fields of activity in ILC: works on photo injector prototype, participation in design and construction of cryomodules, laser metrology, etc. Moreover Joint Institute is full-member pretender for possible hosting of ILC in the region near Dubna. International intergovernmental status of JINR, comfortable location of site, well developed infrastructure, geological, climate and relief conditions may become powerful advantages of JINR among other institutes. All above mentioned topics are discussed in the presented report.

22

• Yu.Korotaev, I.Meshkov, A.Sidorin, A.Smirnov
  JINR Russia

• J. Dietrich, V. Kamerdjiev, R. Maier, D. Prasuhn, H.J. Stein, H. Stockhorst,
  ForschungszentrumJuelich Germany

• A. Noda, T. Shirai,
  Institute for Chemical Research Kyoto University, Japan

Results of experimental studies of the electron cooling of a proton beam at COSY (Juelich, Germany) are presented. Intensity of the proton beam is limited by two general effects: particle loss directly after the injection and development of instability in a deep cooled ion beam. Results of the instability investigations performed at COSY during last years are presented in this report in comparison with previous results from HIMAC (Chiba, Japan) CELSIUS (Uppsala, Sweden) and LEAR (CERN). An influence of secondary ions stored in cooling electron beam was studied, the results are presented. The methods of the instability suppression, which allow increasing the cooled beam intensity, are described. Electron cooling at COSY was also investigated at extremely low proton current. Experimental results for the attempt to achieve of ordered state of proton beam is presented. This work is supported by RFBR grant # 05-02-16320 and INTAS grant #03-54-5584.

31

• V.F.Bykovsky, A.G.Kobets, Yu.V.Korotaev, V.I.Lohmatov, I.N.Meshkov, R.V.Pivin, A.Yu.Rudakov, I.A.Seleznev, A.O.Sidorin, A.V.Smirnov, G.V.Trubnikov, S.L.Yakovenko
  Joint Institute Nuclear Research, Dubna, Russia

General goal of the LEPTA (Low Energy Particle Toroidal Accumulator) project, which is under development in JINR now, is to create small positron storage ring equipped with an electron cooling system. Storage ring of LEPTA facility was commissioned in September, 2004. Results of testing the storage ring with electron beam are presented. Positron injector for the ring is based on ²²Na radioactive source. Positrons from the source are moderated in the solid neon and stored in electromagnetic trap. First experiments with the solid moderator have been performed. The positron trap is under test now with electron beam. This work is supported by RFBR grant 05-02-16320.

• Y.V.Korotaev, I.N.Meshkov, V.N.Pavlov, A.U.Rudakov, A.O.Sidorin, P.I. Shmidkov, S.L.Yakovenko
  Joint Institute for Nuclear Research, Dubna, Russia

The cryogenic source of low energy positrons based on the 22Na isotope had been designed at JINR. A Solid neon as moderator has allowed to form slow positron beam at energy 1,2 eV and width of the spectrum 1 eV. Such positrons are accumulated after in the Penning-Malmberg trap. Description of the installation and experimental results are presented in this paper. This work is supported by RFBR grant # 05-02-16320

171

MOBP06

• I.Meshkov, R.Pivin, A.Sidorin, A.Smirnov, G.Trubnikov
  Joint Institute Nuclear Research, Dubna, Russia

BETACOOL program developed by JINR electron cooling group is a kit of algorithms based on common format of input and output files. The program is oriented to simulation of the ion beam dynamics in a storage ring in presence of cooling and heating effects. The version presented in this report includes three basic algorithms: simulation of r.m.s. parameters of the ion distribution function evolution in time, simulation of the distribution function evolution using Monte-Carlo method and tracking algorithm based on molecular dynamics technique. General processes to be investigated with the program are intrabeam scattering in the ion beam, electron cooling, interaction with residual gas and internal target.

• I.Meshkov, V.Shvets, V.Piataev, A.Sumbaev, V.Kobets
  Joint Institute for Nuclear Research (JINR), Dubna, Russia

In the report the status of the project of the S-band electron linear accelerator LUE200 - the driver of a resonant neutron source IREN in the Joint Institute for Nuclear Research is presented.

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