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NuSTAR, FAIR & the UK Community DL, October,2006.

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Presentation on theme: "NuSTAR, FAIR & the UK Community DL, October,2006."— Presentation transcript:

1 NuSTAR, FAIR & the UK Community DL, October,2006

2  “Facility for Antiproton and Ion Research (FAIR)” : SIS 100/ m FAIR GSI today SIS 18UNILAC ESR HESR Super FRS Super FRS RESRCR NESR Rare Isotope

3 The Present Rare Isotope Facility at GSI  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 experimental areas  Limited maximum magnetic rigidity FRS: for U-like ESR:cooler performance and to deflect break-up fragments)  Limited space in front of the production target  Limited space at the experimental area 1  Limited space at the ESR injection area 2  Beam-line magnets, area 3, are not designed for fragment beams Limitations


5 The Super-FRS and its Branches NuSTAR- [Nuclear Structure Astrophysics and Reactions] Collaboration R3B EXL ELISE ILIMA

6 UK Community and NuSTAR  Groups at Paisley, Glasgow, Edinburgh, York, Manchester, Liverpool, Birmingham, Surrey, Brighton and Daresbury. - theorists at Manchester(4) and Surrey(5) - groups at Strathclyde, Belfast and Cardiff interested in other aspects of FAIR  In total about 75 academics of whom 9 are theorists, 8 or 9 are in other fields and about 45 have their principal interests in FAIR.  Strongly engaged in NuSTAR:- -Chairman of NuSTAR Board—Gelletly (Surrey) -Spokesperson HISPEC Podolyak (surrey) -Deputy Spokesperson DESPEC-Woods (Edinburgh) -Spokesperson LASPEC-Campbell (Manchester) -Spokesperson EXL Chartier (Liverpool) -Spokesperson ILIMA-----Walker (Surrey)  Grant awarded to build active stopper for DESPEC-Edinburgh/Liverpool/Rutherford.  Strong involvement in RISING, EXL tests, ILIMA tests etc.  Daresbury and Rutherford personnel engaged in electronics and data acquisition.

7 Contributions - experiment  DESPEC Gamma ray array  DESPEC Active stopper  Electronics and data acquisition for NuSTAR and sub-projects  Mechanical arrangements for HISPEC/DESPEC and elsewhere.  Tracking detectors for NuSTAR-for example Diamond detectors (Surrey and Rutherford)  Beamlines – all aspects from design to assembly and test.  Heavy ion spectrometer for R3B – design to assembly and test.  AGATA  Detector development generally-Si, CdZnTe, Diamond etc. 

8 The high-energy branch of the Super-FRS: A universal setup for kinematical complete measurements of Reactions with Relativistic Radioactive Beams The R 3 B experiment: identification and beam "cooling" (tracking and momentum measurement,  p/p ~10 -4 ) exclusive measurement of the final state: - identification and momentum analysis of fragments (large acceptance mode:  p/p~10 -3, high-resolution mode:  p/p~10 -4 ) - coincident measurement of neutrons, protons, gamma-rays, light recoil particles applicable to a wide class of reactions The setup

9  Decay spectroscopy (DESPEC)  In-flight  spectroscopy (3 – 100 MeV/u) (HISPEC)  Laser spectroscopy (LASPEC)  Ion traps (MATS)  Neutron capture (NCAP)  Antiprotonic nuclei (Exo+pbar) Experiments at the low-energy branch Energy-bunched slowed-down and stopped beams


11 in-beam  -ray spectroscopy  -decay spectroscopy LASER spectroscopy in-trap ex- periments Unique feature: RIBs and pbar at (almost) the same place pbar RIB Slow beams ( MeV/u) Stopped beams ( ~ 25meV) ISOL-type beams (~ keV) Highly- charged ions Monoenergetic degrader Monoenergetic + variable degrader He-filled ion catcher EBIS + analyzer Experiments at the low-energy branch

12 FAIR-the Complex of Storage Rings A unique combination where one can apply all the lessons from the SIS-FRS-ESR complex and build on it. CR:-Efficient collection and stochastic pre-cooling to  p/p ~ in fraction of  s [at 740 MeV/u] RESR:-beam can be decelerated to 100MeV/u in 1 s

13 EXL – Exotic Nuclei studied in light-ion induced reactions at the NESR Schematic view of a cross-section of the EXL detector system, with the details shown on the right.

14 O.KISELEV, GSI Setup for EXL test experiment at ESR. Experimental Storage Ring Circulating Beam

15 O.Kiselev et al. Test of EXL Idea using the ESR

16 O.Kiselev et al. Test of EXL Idea using the ESR

17 RISING = Rare ISotope INvestigations at GSI 2 major ‘campaigns’ so far 1) Fast (in-beam) Campaign 2) Stopped (isomer/  -decay) Campaign We are in the middle of the isomer part of this campaign. Next year we will be looking at beta decays-in principle the method will be very similar to the experiments to be described in the lectures by Paul Mantica. All the results I will show are preliminary and not fully analysed.

18 EXL- What information can we expect? Elastic scattering -nuclear matter radii/distributions -haloes,skins,central densities Inelastic scattering -surface collective states/electric giant resonances/analysing powers -bulk asymmetric matter/compressibilty/soft modes Charge exchange -GT/spin-dipole resonances/spin-isospin excns. -neutron skin/spin excns./stellar weak interaction rates Transfer reactions -spectroscopic factors/s.p. particle and hole states/pair transfer -s.p.structure/spin-orbit interaction/pairing interaction Quasi-free scattering -s.p.spectral function/cluster knockout -s.p.structure/nucleon-nucleon correlations/in-medium interactions ●First real programme of reaction studies with exotic nuclei in a ring. ●Detector system will handle a wide range of different types of reaction. ●Exclusive measurements-hence of interest with stable beams too.

19 ELISe – Electron-Ion scattering in a Storage Ring Aims:- a)Charge distributions from (e,e) scattering. b)Selective excitation of low-lying collective states,giant resonances and new soft modes using (e,e / ). c)Electrofission studies. d)Studies of (e,e / N) and cluster knockout.

20 Experimental Setup 15 Euroball Cluster detectors Unmodified figures courtesy of GSI Fragment Recoil Separator (FRS) + g detector array + CAlorimeter TElescope (CATE) FRS optimised for required primary fragment TOF between S1 & S2 (~30m), hence  MW’s (x,y) positions also used for tracking

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