EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006 Wolfram KORTEN, JRA-02 AGATA 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 • 180 large volume 36-fold segmented Ge crystals in 60 triple-clusters • Digital electronics and sophisticated Pulse Shape Analysis algorithms
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EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
Status of the AGATA project
• Recent developments• Milestones and deliverables for 2006• Plans for 2007/08
• 180 large volume 36-fold segmented Ge crystals in 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 2006Wolfram KORTEN, JRA-02 AGATA
Ingredients of -ray Tracking
Pulse Shape Analysisto decompose
recorded waves
Highly segmented
HPGe detectors
·
·
··
Identified interaction
points(x,y,z,E,t)i
Reconstruction of “tracks”
e.g. by evaluation of permutations
of interaction points
Digital electronicsto record and
process segment signals
1
2 3
4
Spectroscopic studies
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
AGATA symmetric prototypes
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
Acceptance tests on prototypes
0,00
0,50
1,00
1,50
2,00
2,50
Reihe1
Reihe2
FWHM at 1.3MeV
FWHM at 60keV
Mean(1.3MeV)=1.98keV
Mean(60keV)=1.07keV
Core FWHM: at 1.3MeV : 2.08keVat 122keV : 1.19keV
GSI 002
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
Acceptance tests on prototypes
0,00
0,50
1,00
1,50
2,00
2,50
Reihe1
Reihe2
FWHM at 1.3MeV
FWHM at 60keV
Mean(1.3MeV)=2.01keV
Mean(60keV)=1.03keV
Core FWHM: at 1.3MeV : 2.13keVat 122keV : 1.10keV
INFN Padova 003
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
First AGATA triple module
Univ. Cologne August 2005
Goal: Validation of pulse-shape analysis codes under realistic experimental conditions
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
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 asymmetric Ge 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 2006Wolfram KORTEN, JRA-02 AGATA
Electronics and DAQ developments
Up to 180detectors
Synchronous
Buffered
Analogue
Detectorpreamp.
Digitisers
TrackingControl,Storage…
EventBuilder
Clock100 MHzT-Stamp
PreprocessingPSACore +36 seg.
Ancillary 1.
Ancillary 2.
Handling of ancillary detectors1. interface to GTS via mezzanine 2. merge time-stamped data into event builder3. prompt local trigger available from digitisers
Ancillary 3.
GL Trigger
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
Digitiser module 36+1 channels, 100 MhZ, 14 bits
(Strasbourg - Daresbury – Liverpool)
• Mounted close to the Detector 5-10 m
• Power Dissipation around400W
• Water Cooling
Prototype Segment Board2 boxes per crystal
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
• All prototypes tested by Summer 2006• Full processing chain, including
prototype 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 2006Wolfram KORTEN, JRA-02 AGATA
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 (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: ~300 s, 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 -rays
• Implementation and testing in “real” hardware is ongoing
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
Status of Pulse shape analysis
M. Schlarb et al. (TUM, 2006)
• Example of the mean distance (in mm) of reconstructed position from real position
• in front segment• simulated signals• Similar results from
other PSA codes
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
Procedure of Gamma tracking
~ 100 keV ~1 MeV ~ 10 MeV -ray energy
Isolated hits Angle/Energy Pattern of hits
Photoelectric Compton Scattering Pair Production
Probability of E1st = E– 2 mc2
interaction depth
E' E
1E
m0c2 1 cos
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
Algorithm development and optimisation
Simulation of interactionsof M photons in Agata(with Agata Geant4 code)
Simulation of PSA: packing, smearing,energy threshold
Tracking code
(ei,xi,yi,zi)
(e’k,e’k x’k,x’k y’k,y’k z’k,z’k)
(Ej,j,j) : incident photon energies and emission directions
(and scattering directions for polarisation measurements)
Data analysis
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
• Efficient forward tracking algorithms are ready:
• Effect of neutrons has been investigatedph reduced by ~1%/neutron
• Codes have been optimised for speed andspecifications for the demonstrator have been met :0.1 – 3.5 ms/evt for M=1 -30 (on 1 Opteron 1.7 GHz CPU)
• FT code currently being implemented into the DAQ
Status of gamma-ray tracking
E=1MeV, Mult=1 (30)
Mgt (Padova)
FT (Orsay)
Efficiency (%) 43 (28) 37 (24)
P/T (%) 58 (49) 67 (51)
EURONS PCC-Meeting, Mainz (Germany), 6.-7. April 2006Wolfram KORTEN, JRA-02 AGATA
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 2006Wolfram KORTEN, JRA-02 AGATA
Planning (EURONS and beyond)
• Demonstrator commissioning at LNL: second half of 2007
• First physics campaign at LNL in 2008further campaigns (from 2009) at GANIL, GSI, ILL, …
• LoI for construction phase signed in 2005to allow bids for new funds from 2006 (D, …)
• MoU for AGATA construction ready in 2007• Start construction in 2008 1 in possible in 2011• Support in FP7 as an independent RI (I3-TNA, CNI, …)