EXOGAM2 + NEDA G. de France. NEDA meeting, Istanbul, June 2009 G. de France G. de France, GANIL...
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Transcript of EXOGAM2 + NEDA G. de France. NEDA meeting, Istanbul, June 2009 G. de France G. de France, GANIL...
EXOGAM2 + NEDA
G. de France
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G. de France, GANIL
EXOGAM2 Outline
Scientific Motivations for EXOGAM2 (/SP2 LoI)
Limits of EXOGAM
The technical proposal
Timescale, cost and manpower
Coupling EXOGAM2 and NEDA
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Proton drip line studies and N~Z nuclei:
• Reaction mechanism studies using borromean nuclei (6,8He)
• Rare eath nuclei in the A~130 region: superdeformed ground state
• MED in A=58, T=1 triplet and charge symmetry breaking terms above 56Ni
• T=0 pairing and a new coupling scheme below 100Sn
EXOGAM and the Neutron Wall
Always need charged particle detection in addition to neutrons
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Proton drip line studies and N~Z nuclei: Self-conjugate systems and isospin symmetry Structure around 100Sn T=0 pairing Location of the p-drip line Spectroscopy beyond the drip line Fundamental symmetry:
BR measurements to test the CVC hypothesis Neutrino-less double beta-decay
Experiment: Fusion evaporation or pair transfer reactions; require neutron and
charged particle detection Beta decay (DESIR): 94Ag, 98In, 100Mo
EXOGAM2 Scientific Motivations (1)
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Shell structure of neutron-rich nuclei: Evolution of effective nuclear interaction (monopole and multipole
terms) Quenching of known shell gaps/new ones Collectivity/Onset of deformation Shape phase transition and dynamical symmetries
Experiment : 78Ni and 132Sn regions: adjacent odd isotones/isotopes populated in
DIC in inverse kinematics (complementarity with LNL; with thick target experiments)
Require the coupling to a recoil spectrometer (VAMOS)
EXOGAM2 Scientific Motivations (2)
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Shapes and « high-spin » spectroscopy: Shapes and shape coexistence Rotations vs vibrations Collective modes with large neutron excess New high rank symmetries Jacobi shape transition
Experiment: Low energy excitation spectra (yrast and non-yrast states); 0+ excited
states; lifetimes; quadrupole moments; isomers (decay and rotational bands above)
Projectile Coulomb excitation; fusion evaporation; DIC;… Need VAMOS at 0° and Gas Filled Mode; neutron and charged particle
detectors
EXOGAM2 Scientific Motivations (3)
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Collective modes: From « pure » 2qp states to quadrupole or octupole collective states At higher energy (few MeV above yrast):
properties of Giant Resonances like GDR Damping mechanisms of collective modes Charge equilibration time Symmetry energy Onset of chaos
Experiment: Coulomb excitation of n-rich beams (Sr, Kr, Zr, Sn ) on light targets:
fusion evaporation with n-rich beams (Kr, Xe, Sn) Measurement of gamma-ray energies, strength and angular
distribution Need pure beam
EXOGAM2 Scientific Motivations (4)
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Spectroscopy of heavy elements: Identifying the s.p. orbitals involved in the configuration of these nuclei and
their role Collectivity on nuclei located around the small islands of deformation
(centred around 254No and 270Hs). The role of K-isomerism on “stability” in this mass region. The angular dependence of the fission barriers.
Experiment: Coulomb excitation of 254No RDT following fusion evaporation EXOGAM+VAMOS High intensity stable beams
EXOGAM2 Scientific Motivations (5)
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EXOGAM2 Limits of EXOGAM
PSA originally planned and needed (resolution) Rate limitation (DT32, common dead time readout mechanism) D-size VXI maintenance GANIL context:
SIBs high intensity stable beams; inverse kinematics; fast beams… RIBs fragmentation (fast beams)
SPIRAL2 context: SIBs high intensity stable beams ; inverse kinematics RIBs access; reliability; robustness
AGATA context: achievements
Need urgently an upgrade to realize the physics programme
New design specifications to cope with the identified constraints
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EXOGAM2 technical proposal Introduction
The EXOGAM2 technical proposal• Motivations and design specifications• General architecture• CSP connection box• The NIM digitizer• The Global Trigger and Synchronization• DAQ• Status
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Design specs
Motivations: Better -ray location => digital electronics Dead time reduction => triggerless mode High counting rates => ADONIS method VXI issues (reliability, obsolescence, expertise) => NIM digitizer
Design specifications: Parameters:
- Inner: E6MeV ([email protected], Icr<50kHz), E20MeV, Time, Time Stamping- Outer: E6MeV, Emirror, T30, T60, T90- BGO : Energy (range 20MeV, resolution 15%), Veto- CSI: Energy (range 20MeV, resolution 15%), Veto
Counting rate and readout:- Maximum counting rate: 100kHz per crystal- Readout: about 60 Bytes per crystal => 6 MB/s per crystal
3 trigger modes:- Triggerless: Crystal parameters validation by inner discriminator- Event trigger: Event validation by EXOGAM multiplicity- Common dead time: Event validation by EXOGAM multiplicity and ancillary detectors signals
Coupling EXOGAM2 with ancillary detectors:- Global Trigger System- AGAVA
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Differential Preamplifiers
16 clovers = 64 crystals
Global Trigger and
Synchronization
1 GTS supervisor and
16 GTS mezzanines
1 link per NIM board
( 6 MB/s per crystal) DAQ
KALMAN processing
1 link per NIM
board( 2 Gb/s)
7 differential analog
signals per crystal ICR < 100kHz
per crystal
1 optical link
per NIM board
8 fast ADCs14 bits, 100MHz
Power
GTS mezzanine
FPGAVirtex 4 (or 5,6)
Inspections
EthernetSlow Control
EthernetGbit
Optical Link(ADONIS)
START/STOP
Digitizer and processing
1 crystal / NIM board => 64 NIM boards
Switch Ethernet
General architecture
GTS topoly GTS mezzanine
The GTS supervisor sources:- the 100 MHz common clock- the global 48 bits timestamps (clock and event counters)- the trigger fast commands (validation, reject, reset, calibration)The GTS supervisor sinks: - the local trigger requests - the error notifications
The GTS mezzanine provides:- the clock, timestamps and trigger commands for the LLP carriers- the mechanism for tagging and storing the local trigger requests- the trigger matching algorithm- the mechanism for phase equalization at the nodes (LLPs, ADCs)The GTS mezzanine routes: - the tagged local trigger requests and LLP status to the GTS node
The window based trigger matching:The AGATA readout column
*At the time of the validation arrival (trigger input, from the current value of GTS clock the trigger latency is subtracted.http://agata.pd.infn.it/agata_gts.htm
The GTS and synchronization
Data Flow:
- Parameters from the digitizers are merged into an Event Builder based on the Narval acquisition system.
- Narval is currently used at GANIL
Slow Control:
- It consists in doing the setup and the monitoring of the digitizers and the GTS boards
- The Slow Control Core connects boards and GUI; it acts as a server.
- SOAP/XML network protocol and Web Service Description Language interface feature the communication between SCC and GUI.
Run Control:
- It controls and monitors the DAQ components
- Actions such as Initialization, setup, start and stop are performed through the RC
- The Run Control Core connects Data Flow components and GUI; it acts as a server
- SOAP/XML protocol and WSDL interface feature the communication between RCC and GUI.
Analysis and calibrations tools:
- Tools are based on GANIL Root Utilities and Vigru visualization software
Data acquisition system
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Future GANIL DAQ
Gigabit switch
EXOGAM2 FEE
ExogamEvent builder
NEDA VAMOSVXI
MUST2VXI
Gigabit switch
Event builder
Eventdispatcher
Storage
Data Analysis
~60 MB/sec
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Coupling EXOGAM-NEDASome basic specifications
High rates digital electronics; sampling freq.
n-deficient nuclei => NEDA=Trigger/Ch. Part. = Veto or « tagger »
n-rich => NEDA=veto/Ch. Part. = Trigger need to generate and accept trigger signal
Trigger or veto: need to identify a neutron in a huge gamma flux PSA
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EXOGAM collaboration: GANIL, IN2P3 (CSNSM, IPNO), IRFU, KTH Stockholm, University of York, Liverpool, Surrey, Manchester, STFC Daresbury, JYFL, ATOMKI, GSI, Warsaw)
EXOGAM2 SPIRAL2-PP participants: GANIL, CNRS(LIST/DETECS/SSTM), CEA, STFC, U. of Liverpool, ATOMKI, GSI, INRNE
INFN IUAC New Delhi Mumbai Krakow ILL?
EXOGAM2 Status of the collaboration
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Estimated cost for the electronics of 16 clovers
Item Quantity Price/unit (k€) Total price (k€)
Preamplifiers and interconnection box
64 1.125 72
(digitizer + GTS) NIM CrateNIM module (8 FADCs)GTS mezzanine
66464
103
2.5
60192160
ATCA GTS:ShelfShelf managerPower blocksGTS mezzanineGTS supervisor
116
161
3.51.50.52.5
6
3.51.5
3406
Switch 48 voies 1 2 2
Sub total (k€) 540
Estimated manpower (in men.monthes)
Item PrototypeImplementationTraining
Mass production and tests
Preamplifiers and interconnection box
20 5
NIM module(hardware, VHDL processing, GTS implementation)
90 20
ATCA GTS 15 5
Sub-total (m.m) 125 30
TOTAL (m.m) 155
Finances and manpower requirements
Cables: MDR 13 pairs 64 0.3 19.2
TOTAL (k€) 559
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250 k€ France 72 k€ from SP2-PP 66 k€ from EXOGAM (UK, I, CEA) 16 k€ from Sweden 50 k€ CPER 75 k€ ILL??
529 k€ in hands/promised 30 k€ to be found (GTS cost reduction?)
EXOGAM2 Status of finances
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Great physics case with EXOGAM+NEDA which also need a charged particle detction setup
EXOGAM2 is progressing: NUMEXO2, collaboration, funding,MoU
Issue: high rates (gammas) PSA Trigger flexibility: triggerless+data merging after pre
processing or triggered systems Time distribution
=> need a system which ensures: Time stamping Clock distribution Trigger decision
True (at GANIL) for several SPIRAL2 detectors
=> synergies Can we use/adapt EXOGAM2 electronics for NEDA?
Conclusions
« a la GTS »
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