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Slides for Opto-Working Group on COTS and PIC Microcontroller

Slides for Opto-Working Group on COTS and PIC Microcontroller. D. Underwood Sept 12, 2012. Levels of Radiation Sensitivity in Modulator-based COTS devices. Modulator Logic and RF circuitry in Modulator chip Attached CW Laser Voltage regulators Glue, Capacitors, etc

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Slides for Opto-Working Group on COTS and PIC Microcontroller

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  1. Slides for Opto-Working Groupon COTS and PIC Microcontroller D. Underwood Sept 12, 2012

  2. Levels of Radiation Sensitivity in Modulator-based COTS devices • Modulator • Logic and RF circuitry in Modulator chip • Attached CW Laser • Voltage regulators • Glue, Capacitors, etc • Control Unit ( PIC uC or FPGA or..) Only Issue So Far

  3. QSFP UNIT QSFP Connector 8-Fiber Cable Modulator etc chip PIC microcontroller

  4. ANL Radiation Tests on Modulators Internal PIC uC in Luxtera / Molex COTS failed during both tests, but did not affect operation until power-down For TileCal - rad-hard level is adequate but more devices must be tested 4 • Tested 3 different types of modulators, Luxtera included, at the cyclotron at Massachusetts General Hospital (proton beam); Energy scanned from 207 to 85 MeV • TID of 64 krad, fluence of 8 x 1011 p/cm2 • No SEU. Device functionality acceptable for data readout • Requirements for HL-LHC Tilecal: 45 krad, NIEL 1.5x1012 1 MeV neutron/cm2 as per Kelby • 2 TID tests of Luxtera modulators at ANL van de Graaff electron beam (3MeV). • Device functionality certified to ~100 kRad. • Some issue with temperature readout being investigated by Luxtera

  5. In this Luxtera / Molex device uC is used for startup reads and sets parameters for operation also allows readout of temperature, current, etc After startup, the device will continue to operate until power down (or perhaps some large change in device)

  6. PIC microcontroller uses flash memory This typically dies at ~ 20 K Rad (maybe just SEE ? But this would require reprogramming ) [PIC] I.Galysh, K.Doherty, J. McGuire, H.Heidt, D.Niemi,G.Dutchover, (The StenSat Group) "CubeSat: Developing a Standard Bus for Picosatellites" http://www.stensat.org/Publications/SPIE.PDF. An FPGA can be order 1000 x better but won’t fit onto COTS PC board [FPGA] Z.K.Baker, M.E.Dunham, K.Morgan, M.Pigue, M.Stettler, P.Graham, E.N.Schmierer, J.Power (Los Alamos) “Space Based FPGA Radio receiver Design, Debug, and Development of a Radiation Tolerant Computing System”.International Journal of reconfigurable Computing, Volume 2010,Article ID 546217, doi:10.1155/2010/546217.

  7. A Proposed Interface to the TileCal Main Board 6 Note Extra I2C and monitor links through QSFP connector to emulate non-rad-hard PIC uC TO USA15 Luxtera QSFP connector Stockholm and Valencia are now designing the mainboard and ROD to accommodate the Luxtera QSFP package. ADC low gain ADC hi gain 6 differential serial links (4 Tx, 2 Rx) shaper Integrator charge injection PMT FPGA (Kintex-7) Serializer & Control 12 tubes 12 bit ADCs ADC low gain ADC hi gain shaper Integrator charge injection PMT Integrator multiplexer Integrator ADC Luxtera QSFP has 4 x 14 Gb/s transceivers Inside ATLAS Tilecal Iron Girder QSFP: Quad Small Form Factor Pluggable 7

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