Author/Authors :
Franzke، نويسنده , , B. and Beller، نويسنده , , P. and Beckert، نويسنده , , K. and Dolinskii، نويسنده , , A. and Hülsmann، نويسنده , , P. and Nolden، نويسنده , , F. and Peschke، نويسنده , , C. and Steck، نويسنده , , M.، نويسنده ,
Abstract :
Key issues of the new accelerator facility proposed for GSI are production, fast cooling, and accumulation of intense secondary beams, antiprotons and rare isotopes (RI). Single primary bunches of 2×1013 protons at 29 GeV and 1×1012 U28+-ions at 1 GeV/u shall be delivered from the new, fast-ramped 100 Tm-synchrotron SIS100. A large acceptance, reversible polarity collector ring is foreseen for fast RF debunching followed by fast stochastic pre-cooling in all phase planes. The envisaged total pre-cooling times are 4–5 s for antiprotons at 3 GeV and 0.5–1 s for fully stripped RI at 740 MeV/u. A separate accumulator ring RESR is provided for stochastic accumulation of antiprotons. The RI beams are transferred to a new experimental storage Ring NESR, where electron cooling (EC) is applied simultaneously to internal target and electron–ion collision experiments. For experiments with antiprotons, a special 50 Tm storage ring HESR shall be equipped with internal target and EC up to 15 GeV, optionally also with stochastic beam halo cooling. A maximum luminosity of 2×1032 cm−2s−1 and an energy resolution of about 100 keV at lower luminosity are main objectives of the HESR concept. Basic issues for the design of the storage ring complex are discussed.
