NuSTAR, FAIRNuSTAR, FAIR& the UK Community& the UK Community

DL, October,2006

“Facility for Antiproton and Ion Research (FAIR)” :

SIS 100/300

100 m

FAIRFAIRGSI todayGSI today

SIS 18UNILAC

ESR HESR SuperFRS

SuperFRS

RESR CR

NESR

Rare Isotope Prod.target

The Present Rare Isotope Facility at GSI

S IS FRS ESR

ALADIN

LAND

INJECTION FROM UNILAC

PROD UCTION TARG ET

12

3 FRS Branches

Low primary beam intensity (e.g. 108 238U /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 fragments, @ ESR:cooler performance and magnets, @ALADIN, 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

The Super-FRS and its Branches

NuSTAR- [Nuclear Structure Astrophysics and Reactions] Collaboration

R3B

EXLELISE

ILIMA

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.

Contributions - experimentDESPEC 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.

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The high-energy branch of the Super-FRS:

A universal setup for kinematical complete measurements of

Reactions with Relativistic Radioactive Beams

The R3B 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

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

in-beam -ray spectroscopy

-decay spectroscopy

LASER spectroscopy

in-trap ex- periments

Unique feature: RIBs and pbar at (almost) the same place

pbarRIB

Slow beams(100...3 MeV/u)

Stopped beams ( ~ 25meV)

ISOL-type beams (~10...100 keV)

Highly-charged ions

Monoenergetic degrader

Monoenergetic + variable degrader

He-filled ion catcher

EBIS + analyzer

Experiments at the low-energy branch

FAIR-the Complex of Storage Rings

A unique combination where one can apply all the lessons from the SIS-FRS-ESRcomplex and build on it.

CR:-Efficient collection and stochastic pre-cooling to p/p ~ 10-4 in fraction of s

[at 740 MeV/u]

RESR:-beam can be decelerated to 100MeV/u in 1 s

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.

O.KISELEV, GSI

Setup for EXL test experiment at ESR.

Experimental Storage Ring

Circulating Beam

O.Kiselev et al.

Test of EXL Idea using the ESR - 2006

O.Kiselev et al.

Test of EXL Idea using the ESR - 2006

RISING = Rare ISotope INvestigations at GSI

2 major ‘campaigns’ so far1) 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.

EXL- What information can we expect?

Elastic scattering -nuclear matter radii/distributions -haloes,skins,central densitiesInelastic scattering -surface collective states/electric giant resonances/analysing powers -bulk props.in asymmetric matter/compressibilty/soft modesCharge exchange -GT/spin-dipole resonances/spin-isospin excns. -neutron skin/spin excns./stellar weak interaction ratesTransfer reactions -spectroscopic factors/s.p. particle and hole states/pair transfer -s.p.structure/spin-orbit interaction/pairing interactionQuasi-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.

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.

Experimental Setup

15 Euroball Clusterdetectors

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