NuSTAR, FAIR

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NuSTAR, FAIR the UK Community
W.Gelletly
Physics Department,University of Surrey
DL, October,2006
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• Facility for Antiproton and Ion Research
  (FAIR)

FAIR
GSI today
SIS 100/300
SIS 18
UNILAC
Rare Isotope Prod.target
Super FRS
HESR
ESR
Super FRS
RESR
CR
NESR
100 m
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The Present Rare Isotope Facility at GSI
Limitations

• 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
• (_at_ FRS for U-like fragments, _at_
  ESRcooler performance and magnets, _at_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

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The Super-FRS and its Branches
EXL
ELISE
ILIMA
R3B
NuSTAR- Nuclear Structure Astrophysics and
Reactions Collaboration
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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 BoardGelletly (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.
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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.

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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 setup

• The R3B experiment
• identification and beam "cooling" (tracking and
  momentum measurement, Dp/p 10-4)
• exclusive measurement of the final state
• - identification and momentum analysis of
  fragments
• (large acceptance mode Dp/p10-3,
  high-resolution mode Dp/p10-4)
• - coincident measurement of neutrons,
  protons, gamma-rays, light recoil particles
• applicable to a wide class of reactions

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Experiments at the low-energy branch
Energy-bunched slowed-down and stopped beams
? Decay spectroscopy
(DESPEC) ? In-flight g spectroscopy
(3 100 MeV/u) (HISPEC) ? Laser spectroscopy
(LASPEC) ? Ion traps (MATS) ? Neutron capture
(NCAP) ? Antiprotonic nuclei (Exopbar)
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Experiments at the low-energy branch
Monoenergetic degrader
in-beam g-ray spectroscopy
Slow beams (100...3 MeV/u)
Monoenergetic variable
degrader
a, b, g -decay spectroscopy
Stopped beams ( 25meV)
He-filled ion catcher
LASER spectroscopy
ISOL-type beams (10...100 keV)
EBIS analyzer
in-trap ex- periments
Highly- charged ions
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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 10-4 in fraction of ?s
RESR-beam can be decelerated to 100MeV/u in 1 s
at 740 MeV/u
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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.
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Setup for EXL test experiment at ESR.
Experimental Storage Ring
Circulating Beam
O.KISELEV, GSI
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Test of EXL Idea using the ESR - 2006
O.Kiselev et al.
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Test of EXL Idea using the ESR - 2006
O.Kiselev et al.
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• 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.
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EXL- What information can we expect?
?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.
Elastic scattering -nuclear matter
radii/distributions
-haloes,skins,central densities Inelastic
scattering -surface collective states/electric
giant resonances/analysing powers
-bulk props.in 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-med
ium interactions
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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.
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Experimental Setup
15 Euroball Cluster detectors
Fragment Recoil Separator (FRS) g detector
array CAlorimeter TElescope (CATE) FRS
optimised for required primary fragment TOF
between S1 S2 (30m), hence ? MWs (x,y)
positions also used for tracking
Unmodified figures courtesy of GSI