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AGATA: Advanced Gamma Tracking Array
MANY APOLOGIESJohn Simpson
Nuclear Physics GroupDaresbury Laboratory
AGATA WEEK SUMMARY and STATUS
Presented by:
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Introduction: The AGATA project
Current status of the AGATA; towards the “demonstrator”
Exploitation of AGATA; demonstrator and beyond
AGATA The Advanced Gamma Ray Tracking Array
Next generation -ray spectrometer based on gamma-ray tracking
4 germanium array no Compton suppression shields
Versatile spectrometer with very high efficiency and excellent spectrum quality for radioactive and high intensity stable beams
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AGATAAGATA(Design and characteristics)
4 -array for Nuclear Physics Experiments at European accelerators providing radioactive and stable beams
Main features of AGATA
Efficiency: 43% (M =1) 28% (M =30)today’s arrays ~10% (gain ~4) 5% (gain ~1000)
Peak/Total: 58% (M=1) 49%
(M=30)today ~55% 40%
Angular Resolution: ~1º FWHM (1 MeV, v/c=50%) ~ 6 keV !!!today ~40 keV
Rates: 3 MHz (M=1) 300 kHz (M
=30)today 1 MHz 20 kHz
• 180 large volume 36-fold segmented Ge crystals in 60 triple-clusters • Digital electronics and sophisticated Pulse Shape Analysis algorithms allow• Operation of Ge detectors in position sensitive mode -ray tracking
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The AGATA CollaborationMemorandum of Understanding 2003-07
Research and Development phaseBulgaria: Univ. Sofia
Denmark: NBI Copenhagen
Finland: Univ. Jyväskylä
France: GANIL Caen, IPN Lyon, CSNSM Orsay, IPN Orsay, CEA-DSM-DAPNIA Saclay, IreS Strasbourg
Germany: GSI Darmstadt, TU Darmstadt, Univ. zu Köln, LMU München, TU München
Hungary: Debrecen
Italy: INFN and Univ. Firenze, INFN and Univ. Genova, INFN Legnaro, INFN and Univ. Napoli, INFN and Univ. Padova, INFN and Univ. Milano, INFN Perugia and Univ. Camerino
Poland: IFJ PAN Krakow, SINS Swierk, HIL & IEP Warsaw
Romania: NIPNE & PU Bucharest
Sweden: Chalmers Univ. of Technology Göteborg, Lund Univ., Royal Institute of Technology Stockholm, Uppsala Univ.
UK: Univ. Brighton, STFC Daresbury, Univ. Edinburgh, Univ. Liverpool, Univ. Manchester, Univ. Paisley, Univ. Surrey, Univ. York
Turkey: Univ. of Ankara, Istanbul University
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AGATA Management Board
J.Simpson (Project Manager)
D.Bazzacco, G.Duchêne, P. Reiter, A.Gadea, J.Nyberg, Ch. Theisen
AGATA Steering Committee
G.deAngelis, A.Atac, F. Azaiez, D.Balabanski, D.Bucurescu, B.Cederwall,J. Gerl, J.Jolie, R.Julin, W.Meczynski,, M.Pignanelli, G.Sletten, P.M.Walker
Chairperson: W.Korten (and EURONS) Vice Chairperson: P.J. Nolan
AGATA Working Groups
AGATA Teams
Data analysisO.Stezowski
MechanicalIntegration
J. Valiente Dobon
PSAR.Gernhaeuser/P.Desesquelles
Gamma-rayTracking
A.Lopez-Martens
Elec. and DAQintegration
P. Bednarczyk
Mechanical designJ.Strachan
DigitisationP.Medina
Data acquisitionX.Grave
Detector and Cryostat
B Bruyneel
Detector data base
K.Hauschild
Impact on performance
M.Palacz
R & D on gammaDetectorsD.Curien
Global clock and Trigger
M.Bellato
Detector Characterisation
A.Boston
Physics & exp. simulationE.Farnea
Devices for key Experiments
N.Redon
InfrastructureP.Jones
Pre-processingI.Lazarus
Run Control & GUI
G.Maron
PreamplifiersA.Pullia
Simulation andData Analysis
J.Nyberg
Ancillary detectors
and integrationA.Gadea
Design andInfrastructureG. Duchêne
Front-endProcessingD.Bazzacco
Detector moduleP.Reiter
DataAcquisitionCh. Theisen
The AGATA OrganisationThe AGATA Organisation(Many thanks to everybody) (Many thanks to everybody)
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The First Step:The AGATA Demonstrator
Objective of the final R&D phase 2003-2008
1 symmetric triple-cluster5 asymmetric triple-clusters
36-fold segmented crystals540 segments555 digital-channels
Eff. 3 – 8 % @ M = 1
Eff. 2 – 4 % @ M = 30
Full EDAQwith on line PSA and -ray trackingIn beam CommissioningTechnical proposal for full array
Cost ~ 6 M € Capital
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AGATA Detectors
Hexaconical Ge crystals90 mm long80 mm max diameter36 segmentsAl encapsulation
0.6 mm spacing0.8 mm thickness
37 vacuum feedthroughs
Symmetric detectors
– 3 deliveredAsymmetric detectors
– 17 ordered (6 accepted, 4 in test, 7 in 2007/8)
Preamplifiers available
– Core (Cologne); Segment (Ganil & Milano)
Test cryostats for characterisation
– 5 deliveredTriple cryostats
– 4 (soon 5) ordered
– 1st being assembled November 2007
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AGATA triple-detector module
First prototype summer 2005 3 encapsulated Ge crystals in one cryostat
111 preamplifiers with cold FET~230 vacuum feedthroughs
LN2 dewar, 3 litre, cooling power ~8
watts
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Plans for 2007:
First asymmetric triple module being assembled now
Source and possibly in-beam tests using “standard” digital electronics
AGATA triple-detector module
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AGATA Design and Construction
180 geometry definedConceptual design of 180 array doneSpecifications of infrastructure parts doneDesign of AGATA demonstrator for LNL final stagesFlanges manufacture startedAssembly in LNL, 2007
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Characteristation and Scanning
Two symmetric capsules
scanned in Liverpool
Commissioning of further
scanning systems
at Orsay and GSI
Scan of an asymmetric capsule
in Liverpool: A PRIORITY
Scan of the 3rd symmetric capsule
662keV
374keV
288keV
Coincidence scan for 3D position determination
Comparison of real and calculated pulse shapes. Validate codes.
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Pulse-Shape Analysis: current statusResults from the analysis of an in-beam test with the first triple module,
e.g. Doppler correction of gamma-rays using PSA results
d(48Ti,p)49Ti, v/c ~6.5%
Results obtained with Grid Search PSA algorithm (R.Venturelli et al.)
Position resolution ~4.4mm
Many different methods are under development
Implementation decision?
1340 1360 1380 1400 1420
energy [keV]
0
5000
10000
15000
20000co
unt
s pe
r ch
ann
el
PSA fwhm 5 keV
E = 1382 keV
SegmentDetector fwhm 13 keV
fwhm 32 keV
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AGATA Digitiser Module 36+1 channels, 100 MhZ, 14 bits
(Strasbourg - Daresbury – Liverpool)
• Mounted close to the Detector 5-10 m
• Power Dissipation around400W
• Water Cooling required
• Testing in Liverpool
(December 2006)
• Production in progress
(for 18 modules)Prototype Segment Board
(2 boards per crystal)First production digitizer at Daresbury
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Pre-processing modules (E,T, hits, …)
• Prototypes tested in 2006
• Core digitizer to core mezzanine and carrier communication errors
• Redesign of carrier (from Nov06)
• Redesign of mezzanines (from Dec06)
• New cards under test
• Good results so far
1 ATCA crate for 2 clusters(6 Ge crystals, 222 channels)
ATCA standard :“full mesh” communication with Gbit Ethernet or PCIexpress switches
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Timescales for the AGATA demonstrator
Six years research and development phase of AGATAStart January 2003 ― End December 2008
• First three symmetric Ge crystals delivered in 2004
• First triple module tested in-beam in summer 2005
• Two symmetric crystals scanned for PSA by end 2006 • First electronics prototypes delivered in summer 2006• Five asymmetric Ge crystals delivered by end 2006
• First scan of asymmetric crystals planned autumn 2007• First AGATA triple module ready by autumn 2007• Second generation electronics prototypes by autumn 2007 • Commissioning of first full electronics chain in spring 2008 • Commissioning of sub array at Legnaro from autumn 2008
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First physics campaign at LNL in 2009 Next campaigns at GANIL then GSI
MoU for AGATA construction from 2008Aim 1 in possible in ~2011Rate of construction depends on production capability and financingStages of physics exploitation, facility development
Status and Evolution
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AGATA web AGATA web pagepage
http://www.gsi.de/http://www.gsi.de/agata/agata/
Talks from last AGATA weekORSAY January 2007
http://www.csnsm.in2p3.fr/groupes/strucnuc/AGATAWEEK/agataweek.html
More Information
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The Management
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Thanks
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