The AGATA project

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The AGATA project
Advanced GAmma Tracking Array
for g - ray spectroscopy under extreme
conditions in a very large energy range with high
efficiency and very good spectral respons
concept of g- ray tracking
design and development
Joint Resaearch Activity (EURONS)
Witek Meczynski
The Henryk Niewodniczanski Institute of Nuclear
Physics Polish Academy of Sciences, Kraków, Poland
North-East European Network meeting, September
14 15, Kraków
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Concept of ?- ray tracking
EUROBALL
limited det. efficiency poor en. resolution at
high recoil velocity
W 0.4
MODEL
too many detectors are needed to avoid summing
effects
W 0.8
AGATA
segmented detectors interaction points of all
g-rays are determined full energy of every
g-ray is reconstructed
W 0.8
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Design and development
36-fold segmented Ge detector
Triple cluster module
hexagonal tapered shape max. diam. 80 mm, length
100 mm
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 lt 5 mm
1 - 3 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
Tracking Algorithms use the results of PSA for
reconstruction of the individual g-rays
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AGATA 4p g- array
Array
180 hexagonal crystals in 60 single clusters
12 pentagonal crystals individually canned
6 780 segments!
230 kg of high purity germanium
inner(outer) radius 17(26) cm
solid angle coverage 77
Major improvements in
Efficiency (Eg1 MeV) 50 (Mg1) 25 (Mg30)
Angular resolution 1o
FWHM (1 MeV, v/c50) 5 keV !
Rates 3 MHz (Mg1), 0.3 MHz (Mg30)
Sensitivity 107
Construction
8 years, completed in 2007/9
Cost 40 M, Effort 150 MY
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Joint Research Activity objectives of the project
demonstration of the new technology with a small
AGATA sub-array
set of tracking modules with digital
pulse-processing electronics, data acquisition
system and ancillary detectors for performance
evaluation
objectives of the project and the EU
contribution
development, construction, commissioning and
evaluation of the prototype AGATA module and
associated electronics
starting date January 1, 2005, duration 4 years
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Joint Research Activity management of the project
41 institutions and laboratories from 11 European
countries
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
Organisation of the AGATA project AGATA
Steering Committee AGATA Manegement Board
AGATA Working Groups
Poland
Detector Module Local Level Processing Global
Level Processing DesignInfrastructure Ancillary
Detectors Data Analysis EU Contact
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Joint Research Activity Polish contribution to
the project
Institutions
Heavy Ion Laboratory, Warsaw University
Institute of Experimental Physics, Warsaw
University
The Andrzej Soltan Institute for Nuclear Studies,
Swierk
The H. Niewodniczanski Institute of Nuclear
Physics Polish Academy of Sciences, Kraków
Working groups
Global Level Processing Data Analysis Ancillary
Detectors
Research team
8 persons
Contributed effort
6 men-years