From FRS to Super-FRS. Martin Winkler

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1 From FRS to Super-FRS Martin Winkler Artic FIDIPRO-EFES Workshop, April 20-24, 2009, Saariselkä, Finland From GSI to FAIR (Facility of Antiproton and Ion Research) The FRagment Separator GSI The Super-FRS (Layout, Features, FAIR The Experimental Branches of the Super-FRS Summary

2 GSI and FAIR FRS

3 GSI and FAIR FAIR in the future L SIS100/300 = 1.1 km Super-FRS

4 GSI and FAIR GSI Linac: UNILAC Synchrotron :: SIS-18 Storage Ring: ESR ESR Secondary Beams: RIB RIB (FRS) Pion Pion FAIR 2 Linac's Proton Electron 8 Rings (Synchrotron, Storage/Cooling) SIS-100, SIS SIS CR, CR, Super-FRS - RESR,NESR e - (( p ))-- Ring Ring (collider) HESR HESR (( p )) FLAIR Secondary Beams: RIB RIB (Super-FRS) Anti-Proton (( p ))

5 Beams at GSI and FAIR

6 Stop ingpo werof Relati vistich eavyi ons BF RSexperi reak-down oftherela mentalresu ltswereth tivisticbeth etheory, emotivatio ao nda.h.so fthenewt erensen heoreticald evelopme ntbyj.lin Secondary Nuclear Beam Facility at GSI FRS: In-flight Separator & High-Resolution Spectrometer 3 SIS Decay Spectroscopy, High-resolution spectrometer, range bunching 2. Masses, Lifetimes, Direct Reactions, Isomeric Beams 3. Reactions Studies (Complete Kinematics)

7 B - E - B Separation Method

8 Standard FRS equipments Target TPC- x,y S2,S4 Plastic scintillator TA, S1, S2, S3, S4, S8 Beam S3,S5,S6 MUSIC ( S2,S4 Full isotope identification mv B ; q Z q ToF v A E Z Z El B NEW: Isomer S4 Pb shield Beam SEETRAM Intensity monitor (primary Schottky probes, Degrader, etc. Stopper Scintillator HPGe

Tracking detectors at the FRS TPCs TPCs High-resolution momentum measurements (~1.

cross-section measurements in the Island of Inversion @ 1GeV/u 48 Ca intensity: ~2 10 9 /spill

9 Tracking detectors at the FRS TPCs TPCs High-resolution momentum measurements (~ ) in knockout reactions 33 Mg + C 32 Mg + ( ) reaction target at S2 Interaction cross-section measurements in the Island of 1GeV/u 48 Ca intensity: ~ /spill spill (1-8) sec multi-injection mode (SIS18) 33 Mg TPCs S1 total rate : /s 33 Mg rate at S2 : ~40 /s max. trigger rate : 10 3 /s (low Z rejection) Rate limitation due to pile-up in the Music at S2 (pile-up rejection by trigger M. Winkler, Artic FIDIPRO-EFES Workshop, April 20-24, selection) 2009, Saariselkä, Finland S4

10 Landmarks from FRS Experiments New Mass Measurements New Fission Studies B=0 p B=0 n B=4MeV F r-process Halo Nuclei 8 B New Fission Fragments Pionic Atoms 78 Ni Shells far off Stability 11 Li Skin Nuclei

11 The Present Rare Isotope Facility at GSI Limitations 'Low' primary beam intensity (e.g U /s) 'Low' transmission for projectile fission fragments (4-10% at the FRS) 'Low' transmission for fragments into the storage ring and to the exp. area # 3 (beam-line magnets are not designed for fragment beams Limited space at focal planes and the experimental areas

12 Layout and Design parameters for the Super-FRS Goal: Larger Acceptance

13 Comparison of FRS with Super-FRS, intensity gain FRS Super-FRS Super-FRS X 10 X 30 FRS Z

14 Production Rates for Exotic Nuclei at FAIR K.-H. Schmidt

15 Separation Performance of the Super-FRS A GeV U on 4 g/cm C target, two Al degraders d/r=0.3, d/r=0.7 Features of two degrader stages Introduction of another separation cut in the A-Z plane Reduction of contaminants from fragments produced in the degrader Optimization of the fragment rate on detectors in the Main-Separator Possible usage of Pre- and Main-Separator for secondary reaction studies 238 U Z Z N N

16 Technical Challenges Remote Handling Target & Beam Catcher SC Multiplets Cryogenics SC Dipoles Radiation Reistant Magnets

Shielding and Handling Concept in the Target

1.5 GeV/u 10 12 /s 238 U (top view, beam

iron 80 ton crane side view Target Transport

17 Shielding and Handling Concept in the Target Area (vertical plug system) Promt Dose Rates 1.5 GeV/u /s 238 U (top view, beam level) concrete Target building (schematic) iron 80 ton crane side view Target Transport Bottle concrete iron hot cell service area decay cell

18 Graphite Wheel Target Solid graphite SGL Carbon R 6400P 5 steps, 1 8 g/cm 2 each step 16 mm wide Spokes from INCONEL 600 Si 3 N 4 ball bearings Ag-coated cages MoS 2 lubrication T limit = 150ºC Motor, media, etc. Local shielding cooling only by radiation R out = 22.5 cm Wheel target

19 K. H. Behr, M. Gleim, K. Sümmerer et al. Prototype Target to be used at FRS with SIS18 beams drive test at company Torsion proof Shaft Coupling dummy shielding Induction heating Prototype target ready Off-line tests started Preparation of induction heating (20 kw generator)

Handling of Beam Catcher primary beam Target We need 3x2 beam catcher: Front part: graphite

20 Beam Catcher (in Collaboration with VECC Calcutta, India) The relative difference in magnetic rigidity (B ) determines where the beam after passing the target is going to be dumped Remote Handling of Beam Catcher primary beam Target We need 3x2 beam catcher: Front part: graphite (20cm+), absorb strong pressure waves, water cooled Back part: iron (60cm) to absorb protons and neutrons.

Layout of the Pre-Separator High-radiation level Normal conducting Super conducting 11 bending dipole magnet Mineral Insulated Cable (MIC) Prototype dipole

21 Layout of the Pre-Separator High-radiation level Normal conducting Super conducting 11 bending dipole magnet Mineral Insulated Cable (MIC) Prototype dipole magnet under construction at BINP, Russia Pole gap height: 180 mm Length / width / hight (m): 3.2 / 3.0 / 2.1 Total weight: 100 t Integrated field quality ±3 10-4

Superferric Dipoles for the Main Separator Number of main dipoles 21 Dipole field Bending angle Curvature radius, R Effective straight length, L effe.

22 Superferric Dipoles for the Main Separator Number of main dipoles 21 Dipole field Bending angle Curvature radius, R Effective straight length, L effe. Good field region Pole gap height Integral field quality (relative) T Degree m mm mm mm H-Type, warm bore, warm iron Sector shape Total weight: ~50 t Prototype fabrication by China FCG IMP Lanzhou, Inst. of El. Eng. Beijing, Inst. of Plasma Phys. Heifei Case welding (LHe vessel) Prototype ready for mapping

23 The NUSTAR Facility at FAIR (The 3 Branches of the Super-FRS) B max =20 Tm NUSTAR = Nuclear Structure, Astrophysics and Reactions

24 NUSTAR LOI's (667 authors) 8 approved LOI by NUSTAR-PAC presented as Technical Proposals in spring 2006

Summary Super-FRS based on experiences with FRS Large-acceptance device using large-aperture SC magnets Two separator stages, multi-branch system R&D for major components as

25 Summary Super-FRS based on experiences with FRS Large-acceptance device using large-aperture SC magnets Two separator stages, multi-branch system R&D for major components as well as civil construction under progress Super-FRS as part of FAIR Construction together with FAIR member states LEB Target Building Supply building R3B CR/ NESR Thank You!

The Super-FRS Project at GSI

2 m A G A T A The Super-FRS Project at GSI FRS facility The concept of the new facility The Super-FRS and its branches Summary Martin Winkler for the Super-FRS working group CERN, 3.1.22 Energy Buncher