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 )
EXOGAM2 Système de détection CsI 16 clovers = 64 cristaux 1 cristal = 4 segments Soit : 64 Inners 256 segments 64 CsI 64 BGO De « Rencontre des jeunes chercheurs la houche 2007», Doan Quang Tuyen
EXOGAM2 Architecture Générale Differential Preamplifiers 2 crystals / 1 NIM board => 32 NIM boards 7 differential analog signals per crystal ICR < 100kHz per crystal Fast Analog to Digital Conversion 16 clovers = 64 crystals 8 links per ATCA carrier (1.4 Gb/s per ADC channel) 1 link per ATCA carrier ( 2 Gb/s) KALMAN processing EXOGAM2 1 link per ATCA carrier DAQ Digital Processing Global Trigger and Synchronization 1 link per hub ( 6 MB/s per crystal) 1 GTS supervisor and 16 GTS mezzanines 1 clover / 1 ATCA carrier => 16 carriers
EXOGAM2 Spécifications 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.
EXOGAM2 Synoptique de « Digitiseur » NUMEXO2 ½ NIM ADC Front End layout: 1 crystal
EXOGAM2 NIM ADC Front End layout: prototype 1 crystal Optical Transmitters and Transceivers Ethernet Serial Link Analog Inputs Inspections Start/Stop
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) 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 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
EXOGAM2 The ATCA processing AGATA ATCA carrier - START/STOP input Digital Processing I/O 1 NIM ADC FE board Traitement num é rique CRYSTAL A CRISTAL A SFP0 - I/O GTS supervisor Inner samples fast readout SFP1 Traitement num Digital Processing é rique CRYSTAL B CRISTAL B - Parameters fast readout (Fabric interface) Traitement num Digital Processing é rique I/O 1 NIM ADC FE board CRYSTAL C CRISTAL C Slow Control Ethernet (Base interface) Traitement num Digital Processing é rique CRISTAL D CRYSTAL D Shelf management 48V power ATCA carrier layout: 1 clover