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EXOGAM2 Quelques motivations
Exogam 2 c’est principalement l’évolution de l’électronique et du DAQ d’Exogam
Meilleure localisation des γ incidents => Flash ADC et filtrage numérique
Réduction du temps Mort => transmission à haut débit (qq Ghz)
Fort taux de comptage => Méthode ADONIS (100 Khz)
Problème de maintenance VXI (obsolescence, expertise) => choix de l’ATCA (expertise Agata )
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EXOGAM2 Système de détection
CsI
De « Rencontre des jeunes chercheurs la houche 2007», Doan Quang Tuyen
16 clovers = 64 cristaux1 cristal = 4 segments
Soit :64 Inners256 segments64 CsI64 BGO
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EXOGAM2 Architecture Générale
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Global Trigger and
Synchronization
DigitalProcessing
Fast Analog to
Digital Conversion
Differential Preamplifiers
7 differential analog signals per crystal ICR < 100kHz per crystal
8 links per ATCA carrier
(1.4 Gb/s per ADC channel)
16 clovers = 64 crystals
2 crystals / 1 NIM board => 32 NIM boards
1 clover / 1 ATCA carrier => 16 carriers
1 link per hub
( 6 MB/s per crystal)
1 link per ATCA carrier
DAQ
KALMAN processing
1 link per ATCA carrier
( 2 Gb/s)
1 GTS supervisor and
16 GTS mezzanines
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EXOGAM2 Spécifications
1) Parameters:- Inner: E6MeV, E20MeV, Time, Time Stamping- Outers: E6MeV, Emirror, T30, T60, T90- BGO : Energy, veto- CSI: Energy, veto
2) Counting and data readout rate:- Maximum counting rate: 100kHz per crystal- Maximum data readout rate, (about 30 Bytes per crystal) : 3 MB/s per crystal
3) Trigger considerations:- Triggerless: Crystal parameters validation from inner discrimination signal
- Event trigger: Event validation from multiplicity signal - Common dead time: Event validation from EXOGAM2 multiplicity and ancillary detectors signals
4) High counting rate spectroscopy :- ADONIS (Algorithmic Development framewOrk for Nuclear Instrumentation and Spectrometry) : Energy processing based on a Kalman filter.- Main benefits: no tuning versus ICR, no balistic deficit.
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½ NIM ADC Front End layout: 1 crystal
EXOGAM2 Synoptique de « Digitiseur » NUMEXO2
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EXOGAM2 NIM ADC Front End layout: prototype 1 crystal
Ethernet
Inspections
Serial Link
Start/Stop
Analog Inputs
OpticalTransmitters andTransceivers
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EXOGAM2 NIM ADC Front End layout: prototype 1 crystal
ZL60101 12 x 2.7 Gbps Parallel Fiber Optic Link Transmitters- 8 raw digital samples lanes (14 bits@100MHz):(2 inners, 4 outers, 1 BGO, 1 CsI)
ZL60301 (4+4) x 2.7 Gbps Parallel Fiber Optic Link Transceivers- 4 Receivers: (Synchronization , 100 MHz clock, 5 Offsets data, Reset)- 2 Transmitters: (Start/Stop, Synchronization Return)
3M MDR connector,102 serie (2*20)- 7 analog differential inputs from preamps:(1 inner, 4 outers, 1 BGO, 1 CsI)- 5 analog differential outputs to preamps:(1 inner, 4 outers)
2 Lemo 00 coaxial connectors, 50Ω- Start/Stop NIM Input/output
Virtex 4 software /firmware blocks:
- Linux
- Communication links: Ethernet, Serial link
- ADC setup
- Analog and digital inspections
- Offset preamps control
- Start/stop transceiver
- ADC raw samples readout
- Synchronization (measurement of the raw samples time transmission for each lane)
- ADC self test
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Traitement numériqueCRISTAL A
Traitement numériqueCRISTAL B
Traitement numériqueCRISTAL C
Traitement numériqueCRISTAL D
Digital ProcessingCRYSTAL A
CRYSTAL B
CRYSTAL C
CRYSTAL D
Digital Processing
Digital Processing
Digital Processing
ATCA carrier layout: 1 clover
-Shelf management- 48V power
-Slow Control Ethernet(Base interface)
- Parameters fast readout (Fabric interface)
- START/STOP input
- I/O GTS supervisorI/O
1 NIM ADCFE
board
I/O1 NIM ADCFE
board
AGATA ATCA carrier
- Inner samples fast readout
SFP0
SFP1
EXOGAM2 The ATCA processing