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Discussions on validation of irradiated MODULES

Discussions on irradiation validation of various sensor modules including conditions, measurements, annealing scenarios, and testing protocols. Key focus on sensors, electronics, mechanics, and miscellaneous aspects.

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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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