The AGATA project concept of  - ray tracking design and development Witek Męczyński The Henryk Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland North-East European Network meeting, September 14– 15, Kraków Joint Resaearch Activity (EURONS) Advanced GAmma Tracking Array for  - ray spectroscopy under extreme conditions in a very large energy range with high efficiency and very good spectral respons

Concept of  - ray tracking  ~ 0.4  ~ 0.8 EUROBALL MODEL AGATA limited det. efficiency; poor en. resolution at high recoil velocity too many detectors are needed to avoid summing effects segmented detectors; interaction points of all  -rays are determined; full energy of every  -ray is reconstructed

Design and development 36-fold segmented Ge detectorTriple cluster module encapsulated in Aluminium can Position sensitivity obtained by Pulse Shape Analysis of the real signal from a segment and induced signals in its neighbours. Position determination in 3D: < 5 mm encapsulated det. in a common cryostat 2 - preamps 3 - frame support 4 - digital pulse procesing electronics 5 - fibre-optic channel for data transfer 6 - LN2 dewar 7 - target hexagonal tapered shape max. diam. 80 mm, length 100 mm Tracking Algorithms use the results of PSA for reconstruction of the individual  -rays

AGATA 4  - array Sensitivity: hexagonal crystals in 60 single clusters Major improvements in: 12 pentagonal crystals individually canned segments! 230 kg of high purity germanium inner(outer) radius: 17(26) cm solid angle coverage: 77 % Efficiency (E  =1 MeV): 50% (M  =1  25% (M  =30) Angular resolution: 1 o FWHM (1 MeV, v/c=50%): ~ 5 keV ! Rates: 3 MHz (M  =1), 0.3 MHz (M  =30) ~ 8 years, completed in 2007/9 Array: Cost ~40 M€, Effort ~150 MY Construction:

Joint Research Activity: objectives of the project demonstration of the new technology with a small AGATA sub-array: objectives of the project and the EU contribution: development, construction, commissioning and evaluation of the prototype AGATA module and associated electronics set of tracking modules with digital pulse-processing electronics, data acquisition system and ancillary detectors for performance evaluation starting date: January 1, 2005, duration: 4 years

Joint Research Activity: management of the project Memorandum of Understanding: to develop, fund, construct and operate an AGATA demonstratrion array to form a research network to investigate novel aspects of nucl. structure 41 institutions and laboratories from 11 European countries Organisation of the AGATA project: AGATA Steering Committee AGATA Manegement Board AGATA Working Groups Detector Module Local Level Processing Global Level Processing Design&Infrastructure Ancillary Detectors Data Analysis EU Contact Poland

Joint Research Activity: Polish contribution to the project Heavy Ion Laboratory, Warsaw University Research team: The H. Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Kraków Global Level Processing Data Analysis Ancillary Detectors Institute of Experimental Physics, Warsaw University The Andrzej Sołtan Institute for Nuclear Studies, Świerk Institutions: Working groups: 8 persons Contributed effort:6 men-years