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NA62 SILICON PIXELS DETECTOR

This report details the current status of the NA62 silicon pixels detector cooling vessel prototype, developed by the INFN Ferrara workshop. It covers testing conducted at room temperature, including Kapton creep, failure pressure, and joint quality assessments between Kapton, resin, and aluminum. The bonding process, joint preparation, and curing times are outlined, alongside results from applied pressure tests. The next steps involve verifying cooling in vacuum conditions, ensuring effective electrical connections, and preparing for integration.

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NA62 SILICON PIXELS DETECTOR

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  1. NA62 SILICON PIXELS DETECTOR COOLING VESSEL PROTOTYPE STATUS REPORT Vittore Carassiti - INFN FE

  2. MATERIALS Vittore Carassiti - INFN FE

  3. MATERIALS Vittore Carassiti - INFN FE

  4. MAKING THE PARTS THE ALL PARTS MADE BY FERRARA WORKSHOP Vittore Carassiti - INFN FE

  5. TESTS @ ROOM TEMPERATURE • THE FOLLOWING TESTS HAVE BEEN DONE : • KAPTON CREEP • KAPTON FAILURE PRESSURE • QUALITY OF THE JOINT KAPTON-RESIN-ALUMINUM Vittore Carassiti - INFN FE

  6. BONDING ALUMINUM FRAME & KAPTON FOIL • PREPARATION OF THE JOINTS : • ALUMINUM JOINT ABRADED AND DEGREASED • KAPTON JOINT LIGHTLY ABRADED AND DEGREASED CURING TIME : 16 h @ 40°C Vittore Carassiti - INFN FE

  7. BONDING ALUMINUM FRAME & KAPTON FOIL Vittore Carassiti - INFN FE

  8. KAPTON CREEP TEST WorkingpressureWp = 1 bar Test pressureTp = 2Wp = 2 bar AFTER TWO WEEKS @ Tp NO EVIDENCE OF CREEP SMALL RESIDUAL DEFORMATION AFTER VENTING Vittore Carassiti - INFN FE

  9. KAPTON FAILURE PRESSURE STRESS ON THE VESSEL BOUNDARY CONDITIONS Pi = 0,1 Mpa (innerpressure) Pe = 0 (outherpressure) s = 5E-05 m (wallthickness) Di = 47E-03 m (innerdiameter) FAILURE PRESSURE CALCULATION EQUIVALENT TENSILE STRESS (Guestcriterion) Vittore Carassiti - INFN FE

  10. KAPTON FAILURE PRESSURE TEST FAILURE PRESSURE = 5 bar ACCORDING TO CALCULATION Vittore Carassiti - INFN FE

  11. JOINT KAPTON-RESIN-ALUMINUM LENGTH OF THE OVERLAP CALCULATION Vittore Carassiti - INFN FE

  12. JOINT KAPTON-RESIN-ALUMINUM THE JOINT AFTER KAPTON FAILURE Vittore Carassiti - INFN FE

  13. COOLING VESSEL THE COOLING VESSEL @ 1,5 bar Vittore Carassiti - INFN FE

  14. THE POWER OF THE DETECTOR 3 THERMOCOUPLES K TYPE (from -50°C to +250°C) 16 RESISTORS 222 Ω – 2W Vittore Carassiti - INFN FE

  15. THE ASSEMBLY Vittore Carassiti - INFN FE

  16. NEXT STEP : CECKING THE COOLING IN VACUUM COOLING VESSEL NITROGEN IN-OUT ELECTRICAL CONNECTIONS & POWER SUPPLY DN 160 CF FLANGE Vittore Carassiti - INFN FE

  17. ACKNOLEDGEMENTS SPECIAL THANKS TO : • COTTA ANGELO (electronic service) • EVANGELISTI FEDERICO (mechanical service) • LANDI LUCA (mechanical service) • PADOAN CLAUDIO (electronic service) • STATERA MARCO (mechanical service) Vittore Carassiti - INFN FE

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