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Data acquisition systems for future calorimetry at the International Linear Collider

Data acquisition systems for future calorimetry at the International Linear Collider. Introduction DAQ design at system level DAQ for ILC Calorimetry: CALICE. Introduction. Introduction.

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Data acquisition systems for future calorimetry at the International Linear Collider

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  1. Data acquisition systems for future calorimetryat the International Linear Collider Introduction DAQ design at system level DAQ for ILC Calorimetry: CALICE 24-10-2008

  2. Introduction 24-10-2008

  3. Introduction Traditionally, DAQ in HEP is at the back of the queue for R&D effort, often leading to a conservative system implementation. To make optimal use of the advancements in industry, a new DAQ should be considered as a ‘generic’ system, with a ‘use case’ for a particular (sub-)detector. D A Q Detector Readout System In most cases, Detectors and associated Readout Systems are designed, tested and approved first, before substantial DAQ effort is undertaken. 24-10-2008

  4. Introduction: generic DAQ design This DAQ is designed as a generic, scalable, and self-contained system, build around commercial off-the-shelf components where possible The generic DAQ is then configured towards multiple ‘use-cases’. ILC calorimetry might not be the only customer Using the generic, core DAQ for other interesting cases is welcomed for stress-testing the system: think of linear collider experiments or SuperLHC 24-10-2008

  5. DAQ design 24-10-2008

  6. DAQ design: global architecture Detector modules called ‘slabs’ deliver data over ~Gbit speed optical fibre • Layer-1 switch routes event data to PC • Target Control re-routes data should a certain PC not be available • After processing, data is routed through a network switch towards event builder/data store 24-10-2008

  7. DAQ design: candidate Level-1 switch Candidate Level-1 switch: state-of-the art full optical switch system Currently investigating performance: switch timing characteristics etc. M. Warren V. Bartsch 24-10-2008

  8. DAQ design: PC-based receiver card PC-based receiver card is a key component in the generic DAQ design • Developed & built by PLD Applications • Large & Fast FPGA: Xilinx Virtex4-FX100 • 8x PCIexpress bus • SFP cages for multi-Gbit/s interfaces • Many high-speed I/O connections To be used for the following tasks: • Data reception • Clock source • Control data transmission • Configuration data distribution 24-10-2008

  9. A DAQ for ILC calorimetry 24-10-2008

  10. ILC Calorimeter DAQ: Architecture DAQ software Off Detector Receiver (ODR) Link Data Aggregator (LDA) Detector Interface (DIF) Detector Unit 24-10-2008

  11. ILC Calorimeter DAQ: system overview DAQ PC ODR LDA DIF DIF DIF DIF Detector Unit Detector Unit Detector Unit Detector Unit Control PC (DOOCS) CCC Storage LDA DAQ PC ODR Detector Unit: long (>1.5m) detector ‘slab’ with integrated front-end electronics DIF: Detector InterFace, servicing the Detector Unig LDA: Link-Data Aggregator. Concentrates data, fanin/fanout for clock and control data CCC: Clock&Control Card: Fanout of clock and fast controls ODR: Off-Detector Receiver: PC interface for the DAQ system PC running DOOCS for run-control and DAQ monitoring 24-10-2008

  12. ILC Calorimeter DAQ: links & protocols LDA DIF DIF DIF DIF Detector Unit Detector Unit Detector Unit Detector Unit Control PC (DOOCS) CCC LDA • DIF-LDA: 80-160 MHz serial link. 8b/10b encoded synchronous data transfers • LDA-ODR: Gbit ethernet (or possibly TLK2501) over optical fibre • CCC-LDA: trimmed version of DIF-LDA link 2 1 3 24-10-2008

  13. ILC Calorimeter DAQ: DIF M. Goodrick, B. Hommels, R. Shaw The DIF concept is generic in firmware, running on detector-specific hardware. Different DIF flavours for ECAL, HCAL ECAL DIF prototype: 65x72mm, 8 layers • JTAG programming header • LDA link HMDI connector • DIF link connector • mini-USB connector • Xilinx PROM • Cypress 2MB 10ns SRAM • Xilinx Spartan3-1000 FPGA • FDTI FT245R USB controller • 20p user header connector • reset pushbutton • 90pin SAMTEC IB connector • ECAL DIF status: • Test hardware in place • Firmware development started • 2 DIFs produced, parts available for 10 more. • DIF hardware is (at least partly) functional 24-10-2008

  14. ILC Calorimeter DAQ: DIF -LDA link DIF HDMI cable pseudo-LDA AC-coupling adapter Link shows signs of life: pseudo-LDA sends CLK & 8B/10B data @ 100MHz over AC-coupled LVDS on HDMI cables stable data loop-back in firmware HDMI connector + cabling standard adapted for excellent price/performance 24-10-2008

  15. ILC Calorimeter DAQ: LDA M Kelly • Aggregate data from many DIF links and send to ODR over Gbit Ethernet link • LDA should serve 10 DIFs • Using commercial board from Enterpoint, with semi-custom add-on boards • However, board came back with problems acknowledged by manufacturer - re-spin now • Major firmware development underway • ODR-LDA protocol progressing • LDA-DIF link being documented 24-10-2008

  16. ILC Calorimeter DAQ: CCC M Warren, M Postranecki Tasks: • Synchronise all subsystems upon pre-spill warning • Act as reliable global clock source for fast clock, and phase-aligned ILC machine clock • Distribute asynchronous fast trigger and/or busy signals • Capable to run stand-alone in tandem with DIF CPLD-based for implementation of complex logic. Routing to/fro many sources and destinations possible 24-10-2008

  17. ILC Calorimeter DAQ: ODR B. Green, A. Misejuk ODR is the use-case for the PC-based DAQ interface card: • Commercial board with custom firmware and software • Task-specific performance optimisation • System-specific extensions: decode LDA event data headers, etc. 170MB/s to disk 24-10-2008

  18. ILC Calorimeter DAQ: Software V. Bartsch, T. Wu Software to follow system architecture: • Modularity • Generic nature with specific interfaces • Scalability • DAQ software requirements in ILC calorimetry: • Support for several calorimeter types, each of significant complexity: O(104) channels, O(103) ASICs, O(102) electronics boards • Preferably use existing DAQ software (framework) • Chose DOOCS being developed at DESY for XFEL • tesla.desy.de/doocs/doocs.html 24-10-2008

  19. ILC Calorimeter DAQ: Software application • Starting from DAQ-ODR interface: first hardware layer & most advanced • Have set-up LDA emulator and passed data in this system: PC->ODR->LDA 24-10-2008

  20. ILC Calorimetry DAQ: CALICE CALICE: physics prototype of ILC calorimeter detector segment: ECAL + HCAL First demonstrator for newly developed DAQ: CALICE testbeam in 2009 DAQ components: Software, ODR, CCC, LDA, DIF prototyped and on track to be ready in time -before everyone else! 24-10-2008

  21. DAQ for future calorimetry at ILC: summary Aim is to develop a DAQ system that is generic in nature, using commercial components where possible The DAQ system should be modular and scalable ILC Calorimeter sub-detectors demonstrators serve as the first well-described ‘use-case’ for the DAQ All DAQ components prototyped in hardware, ready to merge into a full fledged DAQ system through firmware and software development. First serious test opportunity: testbeam in 2009 Exciting times ahead! 24-10-2008

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