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Results from the Irradiation of Four K13C2U / N636 Sandwich Beams

Results from the Irradiation of Four K13C2U / N636 Sandwich Beams. (Tim). Beam Assembly & Irradiation. Geometry 135mm x 40mm x 5mm K13C2U/EX-1515 (45gsm) N636 honeycomb Adhesives Hysol 9396 Hysol 9309.3NA EF8020 (epoxy glue film) x 2 Irradiation at Birmingham

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Results from the Irradiation of Four K13C2U / N636 Sandwich Beams

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  1. Results from the Irradiation of Four K13C2U / N636 Sandwich Beams (Tim)

  2. Beam Assembly & Irradiation • Geometry • 135mm x 40mm x 5mm • K13C2U/EX-1515 (45gsm) • N636 honeycomb • Adhesives • Hysol 9396 • Hysol 9309.3NA • EF8020 (epoxy glue film) x 2 • Irradiation at Birmingham • 29/1, 12/2, 12/3, 14/3 to a dose of 4.3(+/-0.3) x1014 p/cm2

  3. Comparison of Pre- & Post-irradiation Bending Stiffness • Method • Mount in 3-pt bending jig with 100mm span • Load to 80N • Measure load-extension gradient at 50N

  4. Determination of Failure Load • Method • Mount in 3-pt bending jig with 100mm span • Load to 80N, 150, 200N • Determine peak load at break • Similar results to two N636/Hysol9396 beams manufactured & tested (un-irradiated) in 2012

  5. Conclusions • Four beams manufactured with N636 honeycomb cores show little sign of degredation(6% reduction) in 3-pt bending stiffness after irradiation • Two of these beams used EF8020 epoxy glue film • Based on these data both N636 honeycomb and EF8020 epoxy glue films are sufficiently radiation hard for use in the silicon strip layers at HL-LHC.

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