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Electronics for the INO ICAL detector

Electronics for the INO ICAL detector. B.Satyanarayana Tata Institute of Fundamental Research For INO collaboration. INO ICAL prototype detector. 13 layers of 5 cm thick magnetised iron plates 40 ton absorber mass 1.5 Tesla magnetic field 12, 1m 2 RPC layers About 800 readout channels

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Electronics for the INO ICAL detector

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  1. Electronics for the INO ICAL detector B.Satyanarayana Tata Institute of Fundamental Research For INO collaboration

  2. INO ICAL prototype detector • 13 layers of 5 cm thick magnetised iron plates • 40 ton absorber mass • 1.5 Tesla magnetic field • 12, 1m2 RPC layers • About 800 readout channels • Trigger on cosmic ray muons (RPC and scintillation paddles) • Record strip hit and timing information • Chamber and ambient parameter monitoring B.Satyanarayana KEK, Japan November 27, 2007

  3. Electronics scheme for prototype B.Satyanarayana KEK, Japan November 27, 2007

  4. Front-ends on prototype chambers B.Satyanarayana KEK, Japan November 27, 2007

  5. Typical avalanche RPC pulse B.Satyanarayana KEK, Japan November 27, 2007

  6. Preamplifier pulses on trigger B.Satyanarayana KEK, Japan November 27, 2007

  7. Charge-pulse height plot B.Satyanarayana KEK, Japan November 27, 2007

  8. Pulse height-pulse width plot B.Satyanarayana KEK, Japan November 27, 2007

  9. Charge spectrum of the RPC  = 375fC B.Satyanarayana KEK, Japan November 27, 2007

  10. Time spectrum of the RPC t = 1.7nS B.Satyanarayana KEK, Japan November 27, 2007

  11. Preamps for prototype detector HMC based Opamp based B.Satyanarayana KEK, Japan November 27, 2007

  12. Front-end boards 16-channel analog front-end 32-channel digital front-end B.Satyanarayana KEK, Japan November 27, 2007

  13. Signal router boards Control and data Trigger and TDC B.Satyanarayana KEK, Japan November 27, 2007

  14. Data and monitor control module B.Satyanarayana KEK, Japan November 27, 2007

  15. Data and monitor readout Module B.Satyanarayana KEK, Japan November 27, 2007

  16. Final trigger module B.Satyanarayana KEK, Japan November 27, 2007

  17. Prototype detector stack & DAQ B.Satyanarayana KEK, Japan November 27, 2007

  18. On-line data monitoring system B.Satyanarayana KEK, Japan November 27, 2007

  19. ICAL detector fact sheet B.Satyanarayana KEK, Japan November 27, 2007

  20. What is specific for ICAL DAQ? • Large number of data channels to handle; large scale integration needed • But, fewer and simpler parameters to record • Low rates; high degree of multiplexing possible • Monolithic detector; unlike the case accelerator based detectors B.Satyanarayana KEK, Japan November 27, 2007

  21. Recordable parameters (Detector) • Event data • Strip hit information (Boolean, 1 bit per strip) • Strip signal timing with reference to event trigger • Strips ORed to reduce timing channels • Monitor data • Strip single/noise counting rate • Chamber voltage and current B.Satyanarayana KEK, Japan November 27, 2007

  22. Recordable parameters (DAQ) • Preamplifier gain and input offset • Discriminator threshold and pulse width • Trigger logic parameters and tables • DAQ system parameters • Controllers’ and computers’ status B.Satyanarayana KEK, Japan November 27, 2007

  23. Recordable parameters (Gas system) • Open loop versus closed loop systems • Gas flow via Mass Flow Controllers • Exhaust gas flow monitor • Residual gas analyser data • Gas contaminants’ monitor data • Gas leak detectors • Safety bubblers’ status B.Satyanarayana KEK, Japan November 27, 2007

  24. Recordable parameters (Ambient) • Temperature • Gas • Front-end electronics • Barometric pressure • Gas • Relative humidity • Dark currents of the bias supplies • Electronics B.Satyanarayana KEK, Japan November 27, 2007

  25. Broad aspects and requirements • RPC bias, signal pickup and front-end electronics • Digital processing and data readout • Data control and acquisition • Trigger and global clock systems • Slow control and monitoring • Electronics, trigger and data acquisition systems • Low and high voltage power supplies • Closed loop gas system • Cavern ambient parameters • Magnet operation and control • Access, safety devices and control B.Satyanarayana KEK, Japan November 27, 2007

  26. Major sub-systems • Analog and digital front-ends • Mounted inside RPC assemblies • Programmable(?) preamps and comparators • DAQ stations • Mounted on detector front-faces • Latches, pre-trigger generators, pipelines and buffers • Time to digital converters (TDCs) • Data concentrators and high speed serial transmitters • VME back-ends • Data collectors and frame transmitters • Trigger control and fan-outs • Trigger system • Works on inputs from front-ends, back-ends or external • Place for high density FPGA devices B.Satyanarayana KEK, Japan November 27, 2007

  27. Technology standards • RPC bias: Industrial solutions, DC-HVDC • Front-end: ASIC • Digital processing: ASIC/FPGA • Backend: VME • Trigger system: FPGA, Farms(?) • Operating system: Linux • Slow control: SCADA/PVSS/Ethernet B.Satyanarayana KEK, Japan November 27, 2007

  28. ICAL detector concept 50 Kton magnetised ICAL B.Satyanarayana KEK, Japan November 27, 2007

  29. Placement of front-end electronics RPC signal pickup panel Front-end for X-plane RPC Gas volume Front-end for Y-plane B.Satyanarayana KEK, Japan November 27, 2007

  30. Cables & services routing RPC Iron absorber Gas, LV & HV cables from RPCs RPC Signal cables from RPCs B.Satyanarayana KEK, Japan November 27, 2007

  31. DAQ & services’ sub-stations Iron absorber RPC Iron spacer DAQ HV Gas LV Iron absorber Gas B.Satyanarayana KEK, Japan November 27, 2007

  32. A promising DC-HVDC chip Can this be good cheaper alternative to commercial solution? B.Satyanarayana KEK, Japan November 27, 2007

  33. Fast preamp ASIC • Rise Time: ~1ns • Power consumption: ~100mW • Power supply: 3.3V • Technology: 0.35 • Dynamic range: 50-350fF B.Satyanarayana KEK, Japan November 27, 2007

  34. Comparator ASIC B.Satyanarayana KEK, Japan November 27, 2007

  35. Example for front-ends: NINO Francis Anghinolfi et al B.Satyanarayana KEK, Japan November 27, 2007

  36. Other examples for front-ends Front-end for ATLAS Muon RPC system Front-end for CMS Muon Barrel RPC system B.Satyanarayana KEK, Japan November 27, 2007

  37. HPTDC architecture J. Christiansen, CERN B.Satyanarayana KEK, Japan November 27, 2007

  38. HPTDC specifications B.Satyanarayana KEK, Japan November 27, 2007

  39. AMT chip for ATLAS Muon RPC Yasuo Arai (KEK) B.Satyanarayana KEK, Japan November 27, 2007

  40. AMT chip performance B.Satyanarayana KEK, Japan November 27, 2007

  41. ALICE TOF timing system • Good example of a large scale integration of timing system using industrial support (CAEN) • VME64X backplane • 2400 high resolution (25pS) channels per crate • Crate equipped with other control, trigger, communication and LV supply modules B.Satyanarayana KEK, Japan November 27, 2007

  42. Summary • RPC’s pulse characteristics and ICAL’s requirements understood to a large extent; more will be known from the prototype detector • Time to formulate competitive schemes for electronics, data acquisition, trigger, control, monitor, on-line software, databases and other systems • Feasibility R&D studies on front-ends, timing elements, trigger architectures, on-line data handling schemes should be concurrently taken up • Segmentation, power budgets, integration issues etc. must be addressed • Trade-offs between using available solutions and customised design and developments for ICAL to be debated • Design tools, infrastructure, fab facilities • Needs national and international collaboration and team work B.Satyanarayana KEK, Japan November 27, 2007

  43. Backup slides

  44. Typical first stage preamp response • Rise time: ~2ns • Gain: 10 • I/O impedance: 50  • Package: 22-pin DIP • Size: 30X 15 mm) • Power supplies: ± 6V • Power consumption: ~110mW • Bandwidth: 350MHz B.Satyanarayana KEK, Japan November 27, 2007

  45. HMC performance: Dynamic range BMC 1596 BMC 1595 BMC 1597 BMC 1598 B.Satyanarayana KEK, Japan November 27, 2007

  46. HMC performance: Timing response BMC 1596 BMC 1595 BMC 1597 BMC 1598 B.Satyanarayana KEK, Japan November 27, 2007

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