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SciFi detector FPGA’s in radiation environment

SciFi detector FPGA’s in radiation environment. Antonio Pellegrino, Wilco Vink , On behalf of the SciFi group February 3 2014. Radiation levels at the SciFi detector Front-end electronics. Dose per collision ( Gy ). SciFI FE Boxes (T1).

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SciFi detector FPGA’s in radiation environment

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  1. SciFi detectorFPGA’s in radiation environment Antonio Pellegrino, Wilco Vink, On behalf of the SciFi group February 3 2014

  2. Radiation levels at theSciFidetector Front-end electronics Dose per collision (Gy) SciFI FE Boxes (T1) At FE location of T3 : ~1.44Gray (0.144 krad) per fb-1 e.g. ~7.2 krad for 50 fb-1 Adopting a factor 2 safety for the simulation uncertainty and another factor 2 safety for the FE irradiation tests a good figure to remember as radiation-hardness specification is ~30 krad (see M. Karacson talk at 14 Feb 2013 Electronics meeting) Wilco Vink, Antonio Pellegrino

  3. Straw tubes SciFi • Upgrade Outer Tracker • Replace the digital frond-end electronics by FPGA based TDC’s • Advanced developments with Actel Proasic3E based TDC • Radiation test performed by Syracuse group • Unable to re-program after ~18 krad • TID limit ~30 krad • SciFi detector • More logic resources needed for data compression algorithm • Microsemi Smartfusion2(SF2) / Igloo2, 65 nm flash based family • SF2 Silicon base for space qualified devices, probably the same • Option to use internal serializers/ GBT protocol Wilco Vink, Antonio Pellegrino

  4. SciFi Front end electronics PACIFIC asic GBT FPGA • Input data rate: 128 channels * 6 bit ADC at 40 MHz from PACIFIC asic • Needs data compression channel clusterization • 288 frond end boxes with each • 16 clusterizationFPGA’s • 4 concentrator / TFC Fan-out FPGA • Total 5760 Microsemi FPGA’s • Specific FPGA cores • PLL • EPCS Serializer for GBT • Used SF2 because of availability, • design for Igloo2 Wilco Vink, Antonio Pellegrino

  5. Summary & Conclusions • SciFi data compressionalgorithm • Unableto fit in Actel Proasic3E • SF2 limited resources (mid-range FPGA) • Fall-back:Xilinx Kintex-7  • No SF2 Irradiationresultsavailableyet • Waitingfor Microsemi tests results, expectedsoon • Nikhef didn’t plan irradiation tests. • But offers tocollaborate ! Wilco Vink, Antonio Pellegrino

  6. Spareslides Wilco Vink, Antonio Pellegrino

  7. Actel ProAsic3E radiation tests Tests of 3APE1500(-2) in 2010-2012 with 200Mev protons at Boston hospital (Syracuse University, M. Artuso, E. Cowan, Bin Gui, D. Hsu, R. Mountain, JC Wang) • see talk by R. Mountain in LHCbElectronis Upgrade Meeting 14/Oct/2010 • see talk by R. Mountain in LHCbElectronis Upgrade Meeting 21/Jul/2011 • roughlyreproduceresultsfrom SPECS test • RAM: few SEU every 3min run (few krad per run) • similarlyfor Flash ROM • see talk byJC Wang in LHCb Electronics Upgrade Meeting 14/Feb/2012 • dedicated test of PLL and Nikhef TDC firmware (see next slides) Wilco Vink, Antonio Pellegrino

  8. IrradiationresultsActel PLL & TDC talk byJC Wang in LHCb Electronics Upgrade Meeting 14/Feb/2012 Verification failed Reconfiguration failed x3 Power-cycle reconfiguration failed Results for FPGA 2 (received 45.6 krad) PLL lock error. (run was with high intensity) Verification OK Reconfiguration OK Verification OK Change comparator value to 11: large error count is seen. Change back to 10. Near station Computer crashed LED indicates TDC = 12 1.2x109 38 1 37 Wilco Vink, Antonio Pellegrino 8

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