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Status of the AGATA project

Status of the AGATA project. Recent developments Milestones and deliverables for 2006 Plans for 2007/08. Main features of AGATA Efficiency : 40% (M  =1) 25% (M  =30) today’s arrays ~ 10% (gain ~4) 5% (gain ~1000) Peak/Total: 55% (M  =1) 45% (M  =30)

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Status of the AGATA project

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  1. Status of the AGATA project • Recent developments • Milestones and deliverables for 2006 • Plans for 2007/08 Main features of AGATA Efficiency: 40% (M=1) 25% (M =30) today’s arrays ~10% (gain ~4) 5% (gain ~1000) Peak/Total: 55% (M=1) 45% (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 crystalsin 60 triple-clusters • Digital electronics and sophisticated Pulse Shape Analysis algorithms • Operation of Ge detectors in position sensitive mode  -ray tracking EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  2. Ingredients of g-ray Tracking 4 1 Identified interaction points Reconstruction of “tracks” e.g. by evaluation ofpermutations of interaction points Highly segmented HPGe detectors (x,y,z,E,t)i g · · Pulse Shape Analysisto decomposerecorded waves · · 2 3 Digital electronics to record and process segment signals Spectroscopic studies EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  3. AGATA symmetric prototypes EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  4. Mean(1.3MeV)=1.99keV FWHM at 1.3MeV FWHM at 60keV Mean(60keV)=1.14keV Acceptance tests on prototypes IKP Cologne 001 Core FWHM: at 1.3MeV : 2.10keV at 122keV : 1.20keV EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  5. Acceptance tests on prototypes GSI 002 Core FWHM: at 1.3MeV : 2.08keV at 122keV : 1.19keV Mean(1.3MeV)=1.98keV FWHM at 1.3MeV FWHM at 60keV Mean(60keV)=1.07keV EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  6. Acceptance tests on prototypes Core FWHM: at 1.3MeV : 2.13keV at 122keV : 1.10keV INFN Padova 003 Mean(1.3MeV)=2.01keV FWHM at 1.3MeV FWHM at 60keV Mean(60keV)=1.03keV EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  7. First AGATA triple module Goal: Validation of pulse-shape analysis codes under realistic experimental conditions Univ. Cologne August 2005 EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  8. Planning for AGATA detectors in 2006 • Three symmetric detectors are being mounted in test cryostats for characterisation (3D scanning): cryostat 1: scanning in Liverpool ongoing cryostat 2: delivery to Orsay in April cryostat 3: delivery to GSI in June • Two first asymmetricGe crystals do not meet specifications and were returned to Canberra-Eurisys for repair. • First detector from “new batch” expected in April. • If problems have been solved by Canberra-Eurysis, first asymmetric triple ready by the end of 2006 EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  9. GL Trigger Detector preamp. Digitisers Analogue Ancillary 3. Clock 100 MHz T-Stamp Up to 180detectors Ancillary 1. Core + 36 seg. PSA Preprocessing Synchronous EventBuilder Control, Storage… Tracking Ancillary 2. Buffered • Handling of ancillary detectors • interface to GTS via mezzanine • merge time-stamped data into event builder • prompt local trigger available from digitisers Electronics and DAQ developments EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  10. Digitiser module 36+1 channels, 100 MhZ, 14 bits(Strasbourg - Daresbury – Liverpool) • Mounted close to the Detector 5-10 m • Power Dissipation around 400W • Water Cooling 2 boxes per crystal Prototype Segment Board EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  11. 3 X 2 Carriers 1 cluster 3 X 2 Carriers 1 cluster 13 11 9 7 5 3 1 2 15 Pre-processing modules (E,T, hits, …) (Orsay – Daresbury) ATCA standard : “full mesh” communication with Gbit Ethernet or PCIexpress switches 1,5U 4 6 8 10 12 14 16 8U 14U 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 4,5U 21’’ Segment preprocessing mezzanine for 6 channels 1 ATCA crate for 2 clusters(6 Ge crystals, 222 channels) EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  12. Global Trigger System (GTS) (Padova – Legnaro) GTS Pre-Proc. mezzanine One per detector (also for ancillaries) Trigger processor layout For up to 12 detectors EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  13. Status of electronics and DAQ prototypes • Digitisers Q1 2006 • Pre-processing mezzanines Q1 2006 • ATCA carrier card Q1 2006 • GTS mezzanine 1 (Virtex2) Q2 2005 • “ mezzanine 2 (Virtex4) Q2 2006 • All prototypes tested by Summer 2006 • Full processing chain, includingprototype of DAQ tested by Autumn 2006 • Any needed reprocessing Autumn 2006 • Production and start delivery Q4 2006 • Test of a triple-cluster Q1-Q2 2007 • Ready for Demonstrator by fall 2007 EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  14. Pulse shape analysis developments • Determine the number of interactions • Neural Net Algorithm (IPN Orsay) • Recognizes ~86% of single hits • Close to 100% of double hits with distance > ~10 mm • Use specific PSA algorithm depending on number of interactions • Several PSA algorithms under development: • Wavelet based grid search (GSI) • Matrix inversion algorithm (IPN Orsay) • Only code to treat full crystal “at once” • Very good results for simple events (D ~ 1-3mm, typical time 1ms) • Still problematic for multiple adjacent interactions • Particle Swarm search (TU München) • So far only single hits per segment • Hit in single segment: ~300ms, mean distance 1.7 mm (front), 3.5 mm (back) • Hits in two segments: <3 ms, distance 3 – 4.6 mm • PSA has been solved for certain event classes, e.g. single and multiple hits in the detector, but not in the same segment • 5 mm average position resolution for 600keV g-rays • Implementation and testing in “real” hardware is ongoing EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  15. Status of Pulse shape analysis • Example of the mean distance (in mm) of reconstructed position from real position • in front segment • simulated signals • Similar results from other PSA codes M. Schlarb et al. (TUM, 2006) EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  16. Procedure of Gamma tracking ~ 100 keV ~1 MeV ~ 10 MeV -ray energy Photoelectric Compton Scattering Pair Production Isolated hits Angle/Energy Pattern of hits Probability of E1st = E – 2 mc2 interaction depth EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  17. Algorithm development and optimisation Simulation of PSA: packing, smearing, energy threshold (ei,xi,yi,zi) (e’k,e’k x’k,x’k y’k,y’k z’k,z’k) Tracking code Simulation of interactions of M photons in Agata (with Agata Geant4 code) (Ej,j,j) : incident photon energies and emission directions (and scattering directions for polarisation measurements) Data analysis EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  18. Status of gamma-ray tracking • Efficient forward tracking algorithms are ready: • Effect of neutrons has been investigated eph reduced by ~1%/neutron • Codes have been optimised for speed and specifications for the demonstrator have been met : 0.1 – 3.5 ms/evt for Mg=1 -30 (on 1 Opteron 1.7 GHz CPU) • FT code currently being implemented into the DAQ EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  19. Status of the AGATA project • Recent developments • General discussion at the next AGATA week: Liverpool, June 6-9 • Characterising the first prototype Ge detectors • Testing the first electronics and DAQ prototype boards • Milestones and deliverables for 2006 • Ge detector prototype characterized (06/06) • o.k., but will use symmetric detector due to delay in delivery • Pulse-shape analysis algorithms optimised (06/06) • Benchmark will be achieved, but will be ongoing • Gamma-ray tracking algorithms optimised (06/06) • Benchmark will be achieved, but will be ongoing • Electronics and DAQ prototypes (06/06) • Prototype local level processing electronics and specific data acquisition hardware:Delivery on schedule • Ready for Demonstrator by fall 2007 EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

  20. Planning (EURONS and beyond) • Demonstrator commissioning at LNL: second half of 2007 • First physics campaign at LNL in 2008 further campaigns (from 2009) at GANIL, GSI, ILL, … • LoI for construction phase signed in 2005 to allow bids for new funds from 2006 (D, …) • MoU for AGATA construction ready in 2007 • Start construction in 2008  1p in possible in 2011 • Support in FP7 as an independent RI (I3-TNA, CNI, …) EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006

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