primary beam

production target

ESR

The GSI Radioactive Beam Facilities

RISING

high-resolution Ge -spectrometer

RISING Electronics Upgrade

Proposal:

Replacement of currently used Euroball VXI Ge detector electronics by dedicated pulse shape electronics.

Improvement;

•Discrimination of neutrons and charged particles from gamma rays by signal shapes reduces strongly the background in the gamma spectra.

•Discrimination of energy pile up from Bremsstrahlung reduces the background, in particular at energies < 500 keV.

•Higher maximal count rates increase the acceptable beam intensity.

•High reliability (compared to increasing problems with defective VXI channels) increase the effective efficiency of Ge the set-up.

Cost:

112 channels XIA DGF-moduls 336 k EUR

2 crates 8 k EUR

Effort;

12 months FTE for development and implementation of the pulse shape algorithms 60 k EUR

Total: 404 k EUR

RISING Electronics Upgrade

primary beam

production target

ESR

The GSI Radioactive Beam Facilities

RISING

high-resolution Ge -spectrometer

Storage ring: development of reaction setup (EXEL)

High-energy reaction setup R3B

new dedicated exp. area: CAVE C

upgrade programme:

detector developments +

large-acceptance dipole

Experimental Scheme: Setup LAND@GSI

~20 m

(40Ar primary beam)

Beam cocktail (all unstable !)

Reaction products after target

20O beam

R3B: A next-generation experimental setup for Reaction studies with Relativistic Radioactive Beams

Goal: Kinematically complete measurements of reactions with secondary beams

Electromagnetic excitations single-particle structure astrophysical S-factor

soft modes giant resonances B(E2)

Knockout / quasi-free scattering single-particle structure, spectral functions

unbound states, spectroscopy beyond dripline

Charge exchange (p,n) GT strength spin dipole resonance neutron skin

Other reactions: Fission, Fragmentation, Multifragmentation, Spallation

Detectors:

* Velocity and ToF detectors ( ~ 10 ps )

* Tracking detectors (Si microstrip)

* Large-area detectors for protons

/ heavy ions

* Proton recoil detector

* LAND upgrade

(improved time resolution)

* Full-absorption gamma spectrometer

Integrated electronics and DAQ system

Large acceptance dipole magnet

(CEA Saclay)

High-resolution momentum spectrometer

Detectors:

* Velocity and ToF detectors ( ~ 10 ps )

* Tracking detectors (Si microstrip)

* Large-area detectors for protons

/ heavy ions

* Proton recoil detector

* LAND upgrade

(improved time resolution)

* Full-absorption gamma spectrometer

Integrated electronics and DAQ system

Large acceptance dipole magnet

(CEA Saclay)

High-resolution momentum spectrometer

LAND / R3B upgrade programme R3B collaboration GSI

IN2P3/IPN Orsay, France

Univ. de Santiago de Compostela, Spain

University of Keele, UK

Physik Department, TU München

Intituto de Estructura de la Materia, CSIC, Spain

Department of Physics, University of Surrey, UK

Department of Physics, Univ. of Liverpool, UK

Kurchatov Institute, Moscow, Russia

University of Manchester, UK

CEA, Saclay, France}

University of Birmingham, Edgbaston, UK

Univ. of Aarhus, Denmark

II. Physikalisches Inst., Univ. Giessen

Chalmers Tekniska Högskola, Göteborg, Sweden

Fizyki, Uniwersytet Jagellonski, Krakow, Poland

Universität Mainz

Institute of Nuclear Research (ATOMKI), Debrecen, Hungary

CLRC Daresbury, UK

Institut für Kernphysik, TU Darmstadt

Institut für Kernphysik, Universität zu Köln,

Michigan State University, USA

Argonne National Laboratory, USA

Forschungszentrum Rossendorf

A large-acceptance dipole for R3B

Present limitations for kinematically complete reaction measurements due to the small field integral of ALADIN (~2 Tm) in beam energy (B<10 Tm) and in bending angle (~12° for 10 Tm)

New magnet design with 5 Tm field integral and high-resolution detectors

Higher beam energies

higher neutron efficiency (~95% for En>400 MeV) precise reaction theory higher excitation energies (higher Fourier components) better beam transport efficiency (up to a factor 5)

Larger bending angle (e.g. 18° for 15 Tm beam) plus tracking

higher momentum resolution fragment mass identification for heavy nuclei better momentum resolution for knockout reactions bending angles up to 40° possible coincident measurement of fragments and protons

Future: Scattering experiments with heavier neutron-rich beams produced via uranium fission

First reaction experiment with fission fragments (S221, October 2002)

Beam cocktail from 238U fission

Aim: Measurement of the

giant dipole strength

in 132Sn

A large-acceptance dipole for R3B

Superconducting coils

Active shielding

High field integral

Large acceptance

Bending power Corresponding field integral

Max. deflection angle of 180 for beams with B= 15 Tm

~ 5 Tm

Vertical and Horizontal Acceptance - Neutrons- Charged Particles- Deflection angle- gap height

+/- 80 mrad (at 0 degree) *)+/- 80 mrad (up to 360)*)0 - 400

32 to 60 cm

*) for a distance between the target and magnet of 100 cm.

Key parameters of the spectrometer

Design: CEA Saclay

Construction proposal: R3B Large-Acceptance Dipole

Task: Construction and installation of a

superconducting large-acceptance dipole magnet

Deliverable: completed dipole magnet (excluding cryogenics plant)

Duration: 3 years, 1/2004 – 12/2006

Collaboration: CEA Saclay, France

GSI, Germany

Costs: final design and cost estimate in January 2004 (by CEA Saclay)

(design simplifications in order to reduce costs)

total costs (order of magnitude) around 5 MEuro (about 50% personnel)

CEA contribution ? EU construction proposal request ? GSI contribution ?

The Future Exotic Nuclear Beam Facility @GSI

II Superconducting large acceptance Fragmentseparator

Optimized for efficient transport of fission products

III Three experimental areas

I High intensity primary beams from SIS 200 (e.g. 1012 238U / sec at 1 GeV/u)

Experiments

knockout and quasi-free scattering

electromagnetic excitation

charge-exchange reactions

fission

spallation

fragmentation

Physics goals

single-particle occupancies, spectral functions, correlations, clusters, resonances beyond the drip lines

single-particle occupancies, astrophysical reactions (S factor), soft coherent modes, giant resonance strength, B(E2)

Gamov-Teller strength, spin-dipole resonance, neutron skins

shell structure, dynamical properties

reaction mechanism, applications (waste transmutation, ...)

-ray spectroscopy, isospin-dependence in multifragmentation

The high-energy branch of the Super-FRS:

A versatile setup for kinematical complete measurements of

Reactions with Relativistic Radioactive Beams

Exotic beam from Super-FRS

Target

Large-acceptance measurement

High-resolution measurement