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Status of GSI-FAIR Project magnets - open issues -

Status of GSI-FAIR Project magnets - open issues -. G. Moritz GSI CARE HHH AMT November 23 2005. Outline. All sc magnets where at which stage which design which parameters R&D overview (Status and outlook) open issues magnet design wire / cable design other R&D

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Status of GSI-FAIR Project magnets - open issues -

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  1. Status of GSI-FAIR Project magnets - open issues - G. Moritz GSI CARE HHH AMT November 23 2005

  2. Outline • All sc magnets • where • at which stage • which design • which parameters • R&D overview (Status and outlook) • open issues • magnet design • wire / cable design • other R&D • series measurement (wire, cable, magnets)

  3. Overview FAIR magnets • resistive: • About 600 magnets • 44 designs, but only 28 different cross sections • largest series: 66 magnets • superconducting • About 1540 • including correctors / steering magnets • main magnets: 8 main designs • largest series: 253

  4. FAIR Topology overview

  5. The FAIR Accelerator Complex superconducting magnets Synchrotrons SIS 100 SIS 300 HEBT SuperFRS Storage rings Pbar target HESR CR-complex: CR

  6. FAIR Project (staging-plan) stage 1 (2007-2011) stage 3 (2013-2015) stage 2 (2011-2013)

  7. CR The Collector Ring dedicated ring for stochastic cooling, optimized for large acceptance and fast cooling circumference 206 m magnetic bending power 13 Tm TDR: only sc dipoles option: cold arc

  8. Superferric dipole of CR and Super-FRS PF2 1.6 T, DC, large aperture iron-dominated, warm iron, warm bore Existing superferric dipole for A1900 Fragment Separator, NSCL, MSU

  9. Superferric Multiplets for the Super-FRS • Warm bore diameter of 38 cm • cold iron, iron-dominated • High pole-tip field (≈ 2.4 T) • 17 Quadrupole triplet + separated sextupoles • Octupole correction coils are embedded Superferric Triplet (BigRIPS @ RIKEN)

  10. Magnet Parameter SuperFRS

  11. SIS 100: distribution of Technical Systems • Rf Compression • Rf Acceleration • Rf Acceleration • Extraction • Injection System plus RF Acceleration and Barrier Bucket • Transfer to SIS300 S3 S2 S4 S1 S5 S6 • cold arcs • warm straight sections • (but cells with sc quads)

  12. Tunnel Cross Section SIS 100 / 300 SIS 300 SIS 100

  13. SIS100 magnets (iron-dominated,cold iron) dipole (2T, 4T/s) quadrupole (33.4 T/m, 66.8 T/m/s) (1) iron (2) SCcoil yoke (3) cooling tube

  14. Magnet Parameter SIS 100

  15. Magnet Parameter SIS 300

  16. HEBT: 100 and 300 Tm beamlines • SIS300-like • beam lines: • - from SIS300 to: • machine dump • CBM-Cave • SIS100-like • beam lines: • - from SIS100 to: • machine dump • Super-FRS, • pbar-Target • AP-Cave • PP-Cave (1) • PP-Cave (2) • - from SIS300 to: • Super-FRS same magnets as in SIS 100 and SIS 300

  17. SIS300 magnets (coil-dominated, cos theta, 2-layer-coil, cored Rutherford-cable) dipole (6T, 1T/s) 100 mm coil ID 3 m long quadrupole (90T/m, 15T/ms) 100 mm coil ID 1 m long Alternative: 4.5T, 8m, curved ?

  18. High Energy Storage Ring (HESR) Designed by the HESR consortium (FZ Jülich, TSL Uppsala, GSI) by courtesy of R. Tölle, FZ Jülich all magnets in the arcs are superconducting magnets!

  19. HESRcosθ-magnets: RHIC-type magnets dipole, 3.6 T, low ramp rate cosθ-magnet, one-layer coil (RHIC D0), curved (13.7 m)? quadrupole, 60 T/m Magnets inside cryostats courtesy of R. Tölle, R. Eichhorn, FZ Jülich

  20. Magnet Parameter HESR

  21. R&D Status Main Magnets: Summary

  22. open issues: magnet design • no design started yet: • fine focusing magnets in front of the targets • all correctors / steering magnets • many sc (?) septa

  23. open issues: magnet design a) • SIS 300 • R&D recommended based on modified lattice • → bent dipoles !! b)

  24. open issues: magnet design

  25. existing designs (to be used for models) EAS double stacked Alstom single stacked CuMn interfilamentary matrix CuNi interfilamentary matrix open issues: low loss wire design design options

  26. Wire parameters 0.825 mm diameter wire, Jc =2700 A/mm2 @ 5 T, 4.2 K, 5 mm twist pitch

  27. open issues: R&D issues • cable • present choice: cored cable (Rc = 20 mOhm ), Ra = 200 µOhm • optimum curing cycle ? • heat transfer measurements • current distribution (joints) mechanical stability fatigue /coil restraint SIS 100 (helium tube) SIS 300 (collar) bent dipole ?? courtesy of P. Bruzzone HTS-leads for pulsed applications, busbars

  28. open issues: series test and measurement • wire and cable • Ic (wire, cable) • Magnetization (time dependent) • Resistances (RRR, Ra, Rc) • ……………. magnet cold testing and magnetic measurement

  29. Testing at CERN (or other locations): • Development of components • fast integrator • ........ • supply of equipment • calibrated coil probes • full systems (polarity meters, moles for industry, stretched wire…) • series tests • resistive magnets • instead of industry • superconducting magnets • only cryostated magnets • SIS 300, HESR, (SIS 100) • SM18 and block 4

  30. Testing at CERN (or other locations):

  31. Conclusions • For many magnets no design work has started yet • Many open R&D issues • Testing scenario to be decided • Schedule is very tight

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