Coupling Neutron Detector array (NEDA) with AGATA The AGATA Front-End processing Electronics & DAQ The AGATA Trigger and Synchronization (GTS) Coupling complementary detectors to AGATA

6660 high-resolution digital electronics channels High throughput DAQ Pulse Shape Analysis  position sensitive operation mode  -ray tracking algorithms to achieve maximum efficiency Coupling to complementary detectors for added selectivity 180 hexagonal crystals3 shapes 60 triple-clusters all equal Inner radius (Ge) 23.5 cm Amount of germanium 362 kg Solid angle coverage 82 % 36-fold segmentation 6480 segments Singles rate ~50 kHz Efficiency: 43% (M  =1) 28% (M  =30) Peak/Total:58% (M  =1) 49% (M  =30) AGATA R&D AGATA R&D (Advanced GAmma Tracking Array)

Structure of Electronics and DAQ TRACKING Control, Storage… EVENT BUILDER PSA FARM Core + 36 seg. GL Trigger Clock 100 MHz T-Stamp Other detectors Fast 1 st Level Trigger interface to GTS, merge time-stamped data into event builder, prompt local trigger from digitisers Detector Level Other Detectors Diff. Fast-reset-TOT 75.5db SNR 12.2 ENOB GTS DIGITIZER PREAMPL. ATCA Carrier GTS Global Level DAQ-NARVAL RUN- & SLOW-Control HIGH THROUGHTPUT PRE-PROCESSING CARRIER / MEZZANINES Other detectors INFN-MI/GANIL/KÖLNIPHC/Liverpool/ STFC IPNO/CSNSM/INFN-Pd IPNO/CSNSM/ LNL/GANIL/IFJ-PAN INFN-Pd Digital preamplifier concept 200MB/s/ segment 100MB/s/ detector

DAQ General Overview Run Control and Monitor System Slow Control Event Builder Tracking Storage Pulse Shape Analysis Front-end electronic and pre-processing Data pre-processing and readout Front-end electronic Trigger Agata Data Flow Ancillary Data Flow DAQ main data flow NARVAL Run-Control based on GRID-CC Required components as data bases, slow control, etc..

AGATA and Other Detectors Other VME GTS supervisor Event Builder PSA Pre-processing Other Readout Digitizer Tracking Online analysis Storage GTS local Other Analogue prompt trigger REQ VAL REQ VAL Ancillary Merge Pre-processing AGAVA GTS interface Trigger AGAVA IFJ-PAN The first real interaction of AGATA with other detectors is at the level of the GTS Possibility to use the Digitizer multiplicity signal to build the ancillary detector trigger

The AGATA Trigger System Tree Structure Based on the GTS Mezzanines Trigger Logic Build in the Global Trigger Processor Possibility to Define Partitions for Different Detectors or Groups of Detectors The logic: Multiplicity conditions within each partition Prompt or Delay Logical Conditions Involving more partitions

M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL

T 90 I 101 T 94I 102T 100I 105I 110I 107 I 190I 194 I 200 Online Sequential Batcher Sort The GTS tree collects all time-stamped trigger request in a single list M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL

Multiplicity Processor T90 200ns T120 T135 T150 >= 3 T T M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL 1.Ordering the Trigger requests 2.Defining the events in the coincidence Window 3.Output of events in coincidence Window with event number

Partitions Coincidence Prompt and delayed Case study: –M(Ge) >= N and M(Ancillary) >= K before/after deltaT M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL

Open Issues –Multiple multiplicity conditions on the same partions: (M(Ge) >= N or M(Ge) >= R) and M(Ancillary) >= K before/after DT –Event number generation: Global ? per partition ? –Validation broadcast M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL This Trigger mode Is very relevant for NEDA: to be implemented in the final Global Trigger processor

AGAVA VME card GTS transceiver FPGA VIRTEX 2 VME backplane connector Optolink to GTS Ethernet IFJ-PAN, Kraków & INFN-Milano

Agava Interface Front Panel contains: Inputs: Trigger request (“external”) (NIM standard) Back pressure (NIM standard) Outputs: Busy (NIM standard) Local Trigger (NIM standard) Rejection Trigger (NIM standard) Validation Trigger (NIM standard) Timeout (NIM standard) Inspection_1 (NIM standard) Inspection_2 (NIM standard) Inspection_3 (NIM standard) Inspection_4 (NIM standard) Clock 100 MHz (LVDS) Metronome and Shark link connectors Ethernet and Optical Fiber Clock Access to the GTS Mezzanine card.

AGATA-Demonstrator PRISMA DAQ cycle (PRELIMINARY)

Coupling Complementary Detectors Trough AGAVA AGAVA is a Complete Interface Towards the AGATA Global Trigger System Provides the Trigger Request – Validation Cycle (with GTS Trigger Latency Provides de Backpresure and Busy signals Provides the Time-Stamp and Event-Number But: GTS concept does not include “Multiplicity” information from a single node or any Other “Qualifying” Information. No information Except the Topological (Partition) and Time is delivered to the Global Trigger System. If Neutron Multiplicity to be considered in a complex trigger scheme a GTS mezzanine per channel is required High costs for a system with individual GTS Mezzanines

Outlook: NEDA as well as the present n-wall have large  -ray counting rates not compatible with a selective trigger A full digital system requires processing capability to discriminate between  -ray and neutrons and within a well defined time. The Digitizer or processing modules need an neutron-trigger output to be use as input in AGAVA. If processing capability on Digitizers, large FPGAs should be on-board. It is not very common in commercial FADC (example, CAEN Cyclone low performance FPGAs, Struck Virtex 4 FX-20). If not a single GTS per channel, the neutron multiplicity has to be defined in the local electronics, no possibility to define dynamic trigger conditions (M  =1 & Mn=2.OR. M  =2 & Mn=1)