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Sensor Irradiations and Testbeams

Sensor Irradiations and Testbeams. 12 th B2GM Bad Aibling. Contents. Neutron Irradiation of HPK mini sensor Plan for beam test in October 2012. Neutron Irradiation. Nuclear Reactor in Vienna TRIGA Mark II (250kW) I rradiation planned for: HPK Baby DSSDs Micron Baby DSSDs

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Sensor Irradiations and Testbeams

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  1. Sensor Irradiations and Testbeams Thoms Bergauer (HEPHY Vienna) 12th B2GM Bad Aibling

  2. Contents • Neutron Irradiation of HPK mini sensor • Plan for beam test in October 2012 Thoms Bergauer (HEPHY Vienna)

  3. Neutron Irradiation • Nuclear Reactor in Vienna TRIGA Mark II (250kW) • Irradiation planned for: • HPK Baby DSSDs • Micron Baby DSSDs Max sensor size limited to irradiation capsule (cylinder: length 10cm, diameter 2,5cm) • Micron Baby did not fit into capsule  • only HPK Baby irradiated • Irradiation performed on March 6th Thoms Bergauer (HEPHY Vienna)

  4. Impressions Thoms Bergauer (HEPHY Vienna)

  5. Fluence Monitoring Calibration run: • diodes irradiated to different fluences • leakage currents measured • Alpha and Kappa determined Actual irradiation: • Fluence has been determined before the run • controlled by leakage current measurements with CMS diodes Belle sensors have been irradiated to 2E12 and 1E13 neutron equivalent Thoms Bergauer (HEPHY Vienna)

  6. Reactor Spectrum Damage function Reactor spectrum -> damage is caused by thermic and fast neutrons Measured spectrum Damage caused per Energy Thoms Bergauer (HEPHY Vienna)

  7. Results of HPK Mini Sensors • Two modules to two different fluences: 2E12 and 1E13 • Although sensor should be stored in freezer to stop diffusion of bulk damage (reverse annealing), sensor was left at room temperature for practical reasons • had to stay in reactor pool for weeks at ~30degC Thoms Bergauer (HEPHY Vienna)

  8. HPK neutron irradiation results 2.8 3.0 1.1 1.1 4.9 4.6 1.9 1.7 Thoms Bergauer (HEPHY Vienna)

  9. HPK neutron irradiation results 2.8 4.9 1.1 1.1 6.2 7.7 1.7 2.0 Thoms Bergauer (HEPHY Vienna)

  10. SVD TESTBEAM 2012 Thoms Bergauer (HEPHY Vienna)

  11. Schedule • CERN SPS H6 Beamtime:12. to 19. October (8:00 to 8:00) • Gamma Irradiation at SCK-CEN Mol (Belgium) from 19. to 26. October • CERN SPS H6 parasitic running with ATLAS colleagues from 27. October to 2. November Thoms Bergauer (HEPHY Vienna)

  12. CERN SPS Testbeam What to test: • Final large Micron sensors (resolution studies) • Micron baby sensors with optimized p-stop pattern • Newly built 2-DSSD-Origami, • Old 1-DSSD-Origamis with different grounding scheme (noise problem during last year’s beam test) Moreover: • CO2 cooling system (already used in 2011) • Linux-based TuxDAQ software (new!) Thoms Bergauer (HEPHY Vienna)

  13. Gamma Co-60 Irradiation in Belgium • 2010:BRIGITTE facility provided 70 Mrad in 1 day -> 100 degC temperature • 2012:RITA facility to provide 70 Mrad in 6 days -> max. 30 degC DUTs: • Final Micron DSSDs • neutron-irradiated HPK baby sensors (mixed-irrad) • Various passive material (e.g. Airex, PCBs, cooling clamp, Sil-Pad,…) Thoms Bergauer (HEPHY Vienna)

  14. Summary • Tough program starting mid October with • One week beam test (CERN) • One week gamma irradiation (Belgium) • One week beam test (CERN) • B2GM November (Japan) • Main Goals: • Acceptance of final Micron sensors to be able to place order for mass production immediately afterwards (critical path for schedule!) • Determine resolution (residuals) of both, rectangular HPK and trapezoidal Micron sensors • Show performance after combined neutron and gamma irradiation • Test many of the materials to be used for support, cooling, mechanics under gamma irradiation Thoms Bergauer (HEPHY Vienna)

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