• I.Bogdanov, S.Kozub, V.Pokrovsky, L.Shirshov, P.Shcherbakov, V.Sytnik, L.Tkachenko, V.Zubko
  IHEP, Protvino, Russia

• J.Kaugerts, G.Moritz
  GSI Germany

GSI, Darmstadt, is planning to build FAIR (Facility for Antiproton and Ion Research). This facility will include the SIS300 stage, a fast-ramping heavy ion synchrotron with a rigidity of 300 T-m, based on 6-T, 100-mm coil aperture superconducting dipoles, ramped at 1 T/s. This article presents investigations concerned with development of the SC dipole for the SIS 300 accelerator. Measured characteristics of the most suitable steels for the iron yoke as well as of superconducting cable are presented. The results of a study of experimental and calculated differences between straight and bent dipole coils are shown. Optimization of geometries from the viewpoint of magnetic and mechanical characteristics was carried out.

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• H.Leibrock, G.Moritz
  GSI, Darmstadt Germany

• Q.Wang
  IEE, Beijing, China

• P.Yuan, Ma Lizhen
  IMP, Lanzhou, China

• S.T.Wu
  ASIPP, Hefei, China

• J.Lucas
  ELYTT Energy, Spain

The Super Fragment Separator (Super-FRS) is conceived as a large acceptance fragment separator, with three branches serving different experimental areas, including a new storage ring complex. Rare isotopes of all elements up to uranium can be spatially separated by the Super-FRS. Unique studies with these isotopes and antiprotons will be performed in the Ring Branch, consisting mainly of a Collector Ring (CR), the New Experimental Storage Ring (NESR), and the Recycled Experimental Storage Ring (RESR). A common requirement for the magnets of these systems is a large acceptance at moderate fields, which can be fulfilled by superferric magnets with wide apertures. Similar requirements for the Super-FRS and CR magnets allow using the same magnet designs for both systems, yielding a reduction of costs and development time. Rare ions and anti-protons will be decelerated in the NESR and RESR, thus requiring pulsed magnets. This requires a coil design different from CR and Super-FRS. The cryostat design has to prevent large eddy current losses. This paper describes the status and development of the aforementioned superferric magnets. Differences and common features will be clarified.

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