Design of the VEPP-2000 Vacuum System

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V.V. Anashin, A.A. Bushuev, A.N. Dranichnikov, R.V. Dostovalov, A.V. Evstigneev, N.V. Fedorov, L.G. Isaeva, A.A. Krasnov, I.A. Koop, V.S. Kuzminykh, N.A. Mezentsev, I.N. Nesterenko, V.N. Osipov, L.M. Schegolev, Yu.M. Shatunov, N.I. Zubkov
The Budker Institute of Nuclear Physics (BINP) project of the VEPP2000 electron-positron Round Colliding Beams in the energy range 2*(0.2 - 1.0)GeV will have an average synchrotron radiation (SR) power of up to 1000W per meter, a very tight packing magnetic elements and beam diagnostic devices. The high photon stimulated desorption rate in the beginning of operation makes the use of the non-evaporated getter (NEG) coating and the cold surface of the cryogenic optics as an effective molecular pumping quite reasonable. The aim of this work is the vacuum system design and estimation of residual gas pressure time profile during conditioning period of the VEPP-2000 operation. The description of manufacturing, cleaning and proposed bake-out procedures for the beam vacuum chambers are presented.