Coupling Neutron Detector array (NEDA) with AGATA

1. 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

2. AGATA R&D(Advanced GAmmaTracking Array) 180 hexagonal crystals 3 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% (Mg=1) 28% (Mg=30) Peak/Total: 58% (Mg=1) 49% (Mg=30) 6660 high-resolution digital electronics channels High throughput DAQ Pulse Shape Analysis  position sensitive operation mode g-ray tracking algorithms to achieve maximum efficiency Coupling to complementary detectors for added selectivity

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

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

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

6. 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

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

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

9. Multiplicity Processor 200ns T135 T500 T150 T120 T90 Ordering the Trigger requests Defining the events in the coincidence Window Output of events in coincidence Window with event number >= 3 1 1 1 2 3 4 3 2 1 T M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL

10. 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

11. 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 This Trigger mode Is very relevant for NEDA: to be implemented in the final Global Trigger processor M. Bellato, L. Berti, J. Chavas, INFN-Pd and LNL

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

13. 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.

15. AGATA-Demonstrator PRISMA DAQ cycle(PRELIMINARY)

16. 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

17. Outlook: • NEDA as well as the present n-wall have large g-ray counting rates not compatible with a selective trigger • A full digital system requires processing capability to discriminate between g-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 (Mg=1 & Mn=2 .OR. Mg=2 & Mn=1)