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Korotaev, Yu.V.

Paper Title Page

WEJO05

 Development of LEPTA facility 

  • 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.

 

 

MOBP05

 Generation and Accumulation Of Low Energy Positrons  

  • 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

 

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WEBO04

 Electron Cooling of Proton Beam at COSY and S-LSR 

  • 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.

 

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