1. AGATA Introduction John Simpson Nuclear Physics Group

5. The 4  180 detector Configuration 180 hexagonal crystals3 shapes 60 triple-clusters all equal Inner radius (Ge) 23.1 cm Amount of germanium 362 kg Solid angle coverage 82 % Singles rate ~50 kHz 6480 segments Efficiency: 43% (M  =1) 28% (M  =30) Peak/Total:58% (M  =1) 49% (M  =30) Ge crystals size: length90 mm diameter80 mm

6. AGATA Detectors 3 encapsulated crystals 111 preamplifiers with cold FET ~230 vacuum feedthroughs LN 2 dewar, 3 litre, cooling power ~8 watts Hexaconical Ge crystals 90 mm long 80 mm max diameter 36 segments Al encapsulation 0.6 mm spacing 0.8 mm thickness 37 vacuum feedthroughs

7. The First Step: The AGATA Demonstrator Objective of the final R&D phase 2003-2008 1 symmetric triple-cluster 5 asymmetric triple-clusters 36-fold segmented crystals 540 segments 555 digital-channels Eff. 3 – 8 % @ M  = 1 Eff. 2 – 4 % @ M  = 30 Full ACQ with on line PSA and  -ray tracking

8. AGATA Prototypes Symmetric detectors –3 ordered, Italy, Germany –3 delivered –Acceptance tests in Koln –3 work very well First results very good: 36 outer contacts 0.9-1.1 keV at 60keV and 1.9-2.1 keV at 1.3 MeV Core 1.2 keV at 60 keV and 2.1 keV at 1.3 MeV Cross talk less than 10 -3

9. AGATA Prototypes Full scan of first Detector in Liverpool First triple cryostat in Cologne

10. Segment level processing: energy, time Detector level processing: trigger, time, PSA Global level processing: event building, tracking, software trigger, data storage

11. 5 Clusters 1111 3333 55 Clusters 4  Array The Phases of AGATA-180