NuSTAR, FAIR NuSTAR, FAIR & the UK Community & the UK Community DL, October,2006
Jan 05, 2016
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