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Discussions on validation of irradiated MODULES

Discussions on validation of irradiated MODULES. W. de Boer, F. Hartmann IEKP - Universität Karlsruhe (TH). Irradiation. Protons in KA and neutrons in Louvain All types (TOB, TEC, TEC1&2, TIB ) with corresponding fluences! Only 300µm thick sensors (modules),can be irradiated to

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Discussions on validation of irradiated MODULES

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  1. Discussions on validation of irradiated MODULES W. de Boer, F. Hartmann IEKP - Universität Karlsruhe (TH) Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  2. Irradiation • Protons in KA and neutrons in Louvain • All types (TOB, TEC, TEC1&2, TIB) with corresponding fluences! Only 300µm thick sensors (modules),can be irradiated to maximum dose (1.6 x 1014 1MeV(Neq.)) else VFD~d²;Power~d³ too high!! • Present extensive tests not foreseen for mass production Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  3. Conditions • Conditions: • No bias voltages! • Electronics on! • -10°C • Nitrogen atmosphere! • Large cold box for irradiation needed ! • Facilities ready! Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  4. Measurements before and after irradiation • Pedestals • Noise • Bad strips (pinholes) • Functionality test with LED / Laser • Pulse shape • S/N & CCE MIPs from 90Sr beta source!! for different annnealing times (benificial,reverse) • Longterm stability @ high voltage, current, power • Plus: sensors, electronics, mechanics, miscellaneous Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  5. Annealing scenario:14 days at RT each year Iterative calculation of full depletion voltage Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  6. Full depletion as function of annealing time and fluence Fluence given at once, then annealing. Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  7. Developement of UFD Full depletion voltages fit well with Hamburg model Predictions for different annealing scenarios are possible Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  8. Sensors • Minimal program (individual sensor irrad. done!) • Still mandatory measurement of: • Full depletion voltage (~d²) • Total leakage current (~d³) • Power consumption • Strip parameters (e.g. interstrip capacitance) On a subsample of strips (similiar to ingot pre-qualification) Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  9. Electronics • Passive component check (Resistors, capacitance ...) • Check read/write commands via I²C of • APV,MUX/PLL,DCU • Calibration pulses • Pipeline scan • DCU – thermistor, linearity, etc • Electronics power consumption Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  10. Mechanics • Microscopic images of glue-areas • Dimensions • Planarity!! • Esp. after longterm test (high voltage, current, power) Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  11. Misc • Electrical contacts (esp. conductive glue) • Bondings -- pull tests • Stability – GLUE • Pitch adapter • Etc..... Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  12. Irradiation Facility • 30 MeV protons • 1000 nA • Beam spot: 2cm O • T < -10°C • Area: 20x40cm2 • Duration: 100cm2 - 15min(1 sensor, 5e13p/cm2) Compact Cyclotron at Forschungszentrum Karlsruhe Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  13. Cold Box • Dry N2 atmosphere at –10°C. • Flexible box to hold sensors and/or modules! • Simple power • lines Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

  14. Conclusions • Most important MODULE tests before and after irradiation: • S/N, stability @ high voltage, current, power • Longterm! • All additions and comments are welcome • Send mail to wim.de.boer@cern.ch and frank.hartmann@cern.ch Module Construction meeting 1.11.2001 IEKP - Universität Karlsruhe (TH)

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