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, K 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
The AGATA project. A dvanced GA mma T racking A rray. 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). - PowerPoint PPT Presentation
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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 conditionsin a very large energy range with high efficiency
and very good spectral respons
Concept of - ray tracking
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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 detector Triple 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
1 - 3 encapsulated det. in a common cryostat2 - preamps3 - frame support4 - digital pulse procesing electronics5 - fibre-optic channel for data transfer6 - LN2 dewar7 - target
hexagonal tapered shapemax. diam. 80 mm, length 100 mm
Tracking Algorithms use the results of PSA for reconstruction
of the individual -rays
AGATA 4- array
Sensitivity: 107
180 hexagonal crystals in 60 single clusters
Major improvements in:
12 pentagonal crystals individually canned6 780 segments! 230 kg of high purity germaniuminner(outer) radius: 17(26) cmsolid angle coverage: 77 %
Efficiency (E=1 MeV): 50% (M=125%
(M=30)Angular resolution: 1o
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 evaluationof the prototype AGATA moduleand associated electronics
set of tracking modules withdigital pulse-processing electronics,data acquisition systemand 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