The GALILEO Project C ă lin A. Ur INFN Sezione di Padova on behalf of the GALILEO collaboration

Outline General remarks Physics case Status of the project Milestones 27/6/2011 EGAN 2011 Padova July ,

Gamma–ray spectroscopy at LNL 27/6/2011 EGAN 2011 Padova July , GASP – HPGe (80%) + AC  ph (1.3MeV) ~ 3% 27 cm) ~ 6% 22 cm) P/T ~ 60% high–spin states populated in fusion–evaporation reactions a brief history

Gamma–ray spectroscopy at LNL 27/6/2011 EGAN 2011 Padova July , a brief history EUROBALL – 1997–1998 European Collaboration 15 cluster detectors + AC 26 clover detectors + AC 30 tapered detectors + AC  ph (1.3MeV) ~ 9% P/T ~ 50 high–spin states populated in fusion–evaporation reactions

Gamma–ray spectroscopy at LNL 27/6/2011 EGAN 2011 Padova July , a brief history CLARA – 2004–2008 European Collaboration 26 clover detectors + AC  ph (1.3MeV) ~ 3% P/T ~ 50% Coupled to the PRISMA magnetic spectrometer neutron–rich nuclei populated In MNT and deep inelastic reactions

Gamma–ray spectroscopy at LNL 27/6/2011 EGAN 2011 Padova July , nowadays AGATA D – 2010 European Collaboration 5 triple cluster detectors segmented detectors tracking array  ph (1.3MeV) ~ 6% Coupled to the PRISMA magnetic spectrometer

Gamma–ray spectroscopy at LNL 27/6/2011 EGAN 2011 Padova July , sometime in the future GALILEO – 2012 European Collaboration new gamma–ray array take advantage of the recent development for AGATA preamplifiers, digital sampling, preprocessing, DAQ use of existing detectors EB cluster detectors capsules packed in triple clusters GASP detectors

The heavy ions accelerators at LNL 27/6/2011 EGAN 2011 Padova July , SC Booster ALPI XTU-Tandem PI Injector PIAVE 14.6 MV low–beta upgrade by July 2012 upgrade new beams

Physics case INFN Sezione di Padova INFN Laboratori Nazionali di Legnaro, Legnaro INFN Sezione di Milano INFN Sezione di Firenze Univerita degli Studi di Padova Universita degli Studi di Milano Universita degli Studi Firenze Institut fur Kernphysik, Universität zu Köln The Niewodniczanski Institute of Nuclear Physics, PAN, Krakow, Poland CSNSM/IN2P3/CNRS, Orsay, France INRNE, BAS, Sofia, Bulgaria University of the West of Scotland, Paisley, UK Department of Physics, Lund University, Lund, Sweden Department of Nuclear and Particle Physics, Uppsala University, Uppsala, Sweden Royal Institute of Technology, Stockholm, Sweden Instituto de Fisica Corpuscular, Valencia, Spain Institut fur Kernphysik, Technische Universitat Darmstadt, Germany CISC and Departamento de Fisica Teorica C-IX, Universidad Autonoma de Madrid, Spain Physik-Department E12, Technische Universitat Munchen, Garching, Germany IPHC, Strasbourg, France Simon Fraser University, Burnaby, B.C., Canada TRIUMF, Vancouver, B.C., Canada Horia Hukubei National Institute for Physics and Nuclear Engineering, Bucharest–Magurele, Romania Universidade de Sao Paulo, Instituto de Fisica, Sao Paulo, Brasil University of Warsaw, Poland School of Physics and Astronomy, University of Birmingham, Birmingham B15 2TT, UK 27/6/2011 EGAN 2011 Padova July , – call for Letters of Intent and very recently, a collaboration between ORGAM and GALILEO is developing for the use of the cluster detectors

Physics case 27/6/2011 EGAN 2011 Padova July , The main topics: - structure of N~Z nuclei - isospin symmetry - study of neutron–rich nuclei - exotic decay of high–spin states - nuclear structure close to 100 Sn - cluster and highly deformed states in sd–shell nuclei - giant resonances and warm rotations - symmetries and shape–phase transitions in nuclei - shape coexistence in neutron–deficient nuclei - misure di fattori giromagnetici

The GALILEO array Main ingredients ◦ the capsules of the EUROBALL cluster detectors ◦ the GASP tapered detectors 27/6/2011 EGAN 2011 Padova July ,

The capsules of the EB cluster detectors 27/6/2011 EGAN 2011 Padova July , x 7– cluster detectors (GSI–RISING array) encapsulated n–type HPGe detectors FWHM < keV  int keV common cryostat HV/LV/FE independent New triple cryostat

The GASP tapered detectors 27/6/2011 EGAN 2011 Padova July , n–type HPGe detectors FWHM < keV  int keV P/T ~ 25% ( 60 Co source) 40 BGO anti–Compton shields P/T ~ 60% ( 60 Co source)

GALILEO – ongoing R&D activities MECHANICS Development of the triple cryostat ◦ end–cap ◦ dewar ◦ internal cabling ◦ optimizing the thermal conduction (LN 2 consumption) Design of the anti–Compton shield ◦ recovery of the individual EB cluster BGO crystals Design of the holding structure ◦ more space for ancillary detectors ◦ flexible configuration (modifiable target–detectors distance, easy mounting of ancillary detectors) Design of the mechanical structure for G.GALILEO ◦ g–factor measurement setup 27/6/2011 EGAN 2011 Padova July ,

The triple cryostat 27/6/2011 EGAN 2011 Padova July , dewar end–cap in Carbon fiber Zeolites container cold finger capsules front–end electronics (warm part) Technical design is ready started the prototype building

The AC shield for the triple cryostat 27/6/2011 EGAN 2011 Padova July , Drawings of the original EB cluster AC shield Investigated the possibility to re–use the single BGO crystals

Anti–Compton shield for GALILEO 27/6/2011 EGAN 2011 Padova July ,  a proposal for the construction of the triple cluster AC shield out of the individual crystals of the original EB cluster shield → one can build only one new shield from the original one  recently moved one EB cluster AC shield to Legnaro → investigate the possibility of safely dismounting the crystals and phototubes

Assembled triple cluster detector 27/6/2011 EGAN 2011 Padova July , GEANT4 by E.Farnea P/T ~ 40% Need of shared suppression among neighboring detectors to improve P/T

Mounting of the triple clusters 27/6/2011 EGAN 2011 Padova July ,

GALILEO – GEANT4 simulation 27/6/2011 EGAN 2011 Padova July , GEANT4 by E.Farnea Definition of the new triple cluster detectors  symmetrical coverage of the solid angle (ang. distr., DSAM)  good granularity  at 90 o detectors have relatively lower solid angle aperture  anti–Compton shields  for GASP detectors already available  for the triple clusters new AC shields  Limited impact on the array performance when dismounting the first ring of detectors to allow insertion of ancillary detectors  ph ~ 8% P/T ~ 50% Mixed configuration 30 GASP 22.5cm o 51 o 59 o 121 o 129 o 151 o 10 triple 24cm 90 o

Holding structure of the array 27/6/2011 EGAN 2011 Padova July , Design by C.Fanin

GALILEO – location 27/6/2011 EGAN 2011 Padova July , Experimental Hall II – replacing GASP

GALILEO – location 27/6/2011 EGAN 2011 Padova July , Experimental Hall II – replacing GASP

GALILEO – location 27/6/2011 EGAN 2011 Padova July , Experimental Hall II – replacing GASP

GALILEO – ongoing R&D activities ELECTRONICS  New electronics is being built in close synergy with AGATA ◦ new cold part (AGATA FET) ◦ use solutions already developed for AGATA  core type preamplifiers  differential output  one single range but extended to ~ 10 MeV  suitable also for the GASP detectors (mechanics, FET, AC/DC)  no pulser  GTS  AGAVA interface with the VME electronics (colab. With Kracow) ◦ new developments for AGATA and GALILEO  low power digitizers  readout and preprocessing on PCI express boards ◦ anti–Compton shields signal readout  digital (similar to the Ge detectors) 27/6/2011 EGAN 2011 Padova July ,

Readout and preprocessing – purpose 27/6/2011 EGAN 2011 Padova July ,

Readout and preprocessing – test 27/6/2011 EGAN 2011 Padova July , Evaluation board for VIRTEX6 Implemented Energy Reconstruction Algorithm D.Bortolato

Readout and preprocessing – test 27/6/2011 EGAN 2011 Padova July , Prototypes ready by September 2011 D.Bortolato

GALILEO and Ancillary Detectors 27/6/2011 EGAN 2011 Padova July , Study of weak reaction channels or weakly populated structures Light charged particles detectors Neutron detectors Binary reactions fragment detectors Recoil detectors High–energy  –ray detectors Fast timing detectors high efficiency + high resolving power EUCLIDES LuSiA TRACE n–Ring N–Wall NEDA RFD SPIDER DANTE MW–PPAC LaBr 3 Lifetime measurement Cologne Plunger HECTOR HECTOR+ PARIS Prototype

GALILEO and Ancillary Detectors 27/6/2011 EGAN 2011 Padova July , Study of weak reaction channels or weakly populated structures Light charged particles detectors Neutron detectors Binary reactions fragment detectors Recoil detectors High–energy  –ray detectors Fast timing detectors high efficiency + high resolving power EUCLIDES LuSiA TRACE n–Ring N–Wall NEDA RFD SPIDER HECTOR HECTOR+ PARIS Prototype DANTE MW–PPAC LaBr 3 Lifetime measurement Cologne Plunger

Milestones Technical design of the triple cryostat – ready ◦ First prototype – November 2011 ◦ Second prototype – March 2012 Readout board prototype – September 2011 Digitizer prototype – December 2011 Preamplifiers (cold and warm) production – December 2011 Holding structure design definition – July 2011 technical design – beginning of 2012 Definition of the anti–Compton shield – November 2011 Production (cryostats, anti–Compton shields, electronics, holding structure) – 2012 Construction of new detectors (MW–PPAC) and completion of the g– factor measurement setup – /6/2011 EGAN 2011 Padova July ,

Invitation Nuclear Structure Symposyum at Padova in June 2013 after INPC at Florence 27/6/2011 EGAN 2011 Padova July ,