Shear test with irradiated samples NA62 - DIPTEM Genova – UCL

Shear tests with four different adhesive types: Adhesive tape NITTO DENKO 30 µm thick Adhesive tape NITTO DENKO 30 µm thick Adhesive tape 3M 9461P – 30 µm thick Adhesive tape 3M 9461P – 30 µm thick Liquid glue Araldite 2020 Liquid glue Araldite 2020 Adhesive film FastelFilm 30 µm thick Adhesive film FastelFilm 30 µm thick Polyester film double coated by acrylic adhesive Polyester = W/m K Acrilyc = 0.2 W/m K 3M Adhesive 100 (Acrylic adhesive) 3M Adhesive 100 = W/m K Two components epoxy liquid glue Epoxy = W/m K EVA (Ethylene - vinyl Acetate) adhesive film EVA = 0.34 W/m K ⁻Surface cleaning with acetone ⁻1 Kg for 65 hours -Surface cleaning with acetone -1 Kg for 3 minutes -80 °C in the oven (weight and plate already hot) ⁻Surface cleaning with acetone ⁻Vacuum outgassing after mixing the component ⁻Dispensing with a slice ⁻Surface cleaning with acetone ⁻1 Kg for 65 hours Silicon samples Silicon samples 10 x 10 mm with wafers 525 µm thick Silicon glue Silicon

Araldite: 25 samples FastelFilm: 25 samples NittoDenko: 25 samples 3M: 25 samples Irradiation Irradiation levels: -No irradiation -3 x x  nominal -1 x NITTO3MFASTEL FILMARALDITE No irradiation N001 N002 N003 N004 N005 M001 M002 M003 M004 M005 F001 F002 F003 F004 F005 A001 A002 A003 A004 A005 3 x N131 N132 N133 N134 N135 M131 M132 M133 M134 M135 F131 F132 F133 F134 F135 A131 A132 A133 A134 A135 1 x  nominal N141 N142 N143 N144 N145 M141 M142 M143 M144 M145 F141 F142 F143 F144 F145 A141 A142 A143 A144 A145 1 x N151 N152 N153 N154 N155 M151 M152 M153 M154 M155 F151 F152 F153 F154 F155 A151 A152 A153 A154 A155 SpareNS6 NS7 NS8 NS9 NS0 MS6 MS7 MS8 MS9 MS0 FS6 FS7 FS8 FS9 FS0 AS6 AS7 AS8 AS9 AS0 Green = glued in Genova the Red = glued at CERN the

Machine Top clamp Bottom clamp INSTRON 8802 – Floor Model Fatigue Testing Systems up to 500 kN

Test procedure Working set up Stainless steel tool to performe the shear force on the samples The tool has been inserted between the two plates of the machine

NITTO3MFASTEL FILMARALDITE No irradiationN001 N002 N003 N004 N005 M001 M002 M003 M004 M005 (Si broken) F001 F002 (open) F003 F004 F005 A001 (Si broken) A002 (Si broken) A003 (Si broken) A004 (Si broken) A005 (Si broken) 3 x N131 N132 N133 N134 N135 M131 M132 M133 M134 (Si broken) M135 F131 F132 (open) F133 F134 F135 A131 (Si broken) A132 (Si broken) A133 (Si broken) A134 (Si broken) A135 (Si broken) 1 x  nominal N141 N142 N143 N144 (Si broken) N145 M141 M142 M143 M144 M145 F141 F142 (open) F143 (Si broken) F144 (open) F145 A141 (Si broken) A142 (Si broken) A143 (Si broken) A144 (Si broken) A145 (Si broken) 1 x N151 N152 N153 N154 N155 (open) M151 M152 M153 M154 M155 F151 (displaced) F152 (displaced) F153 (displaced) F154 (displaced) F155 (displaced) A151 (Si broken) A152 (Si broken) A153 (Si broken) A154 (Si broken) A155 (Si broken) SpareNS6 NS7 NS8 NS9 NS0 MS6 MS7 MS8 MS9 MS0 FS6 FS7 FS8 (open) FS9 FS0 (open) AS6 (Si broken) AS7 (Si broken) AS8 (Si broken) AS9 (Si broken) AS0 (Si broken) Results – general outlook

NittoDenko – No irradiation F force (N)= σ * 100 D displacement (mm)= ε * 10 -First test (N001) ? Set up problems  negletted -Spare and no irradiation should have the same behavior!!

NittoDenko F force (N)= σ * 100 D displacement (mm)= ε * 10 For the first two radiations the adhesive becomes more rigid and stiff! In last case the adhesive is dead!

NittoDenko – Comparison -Spare and no irradiation should have the same behavior!! -The spread of the results is very small Max value = 4.1 Mpa

3M – No irradiation F force (N)= σ * 100 D displacement (mm)= ε * 10 More or less same behavior!!

3M F force (N)= σ * 100 D displacement (mm)= ε * 10 For the first radiation the adhesive becomes more rigid and stiff! Then it starts to become softer  in the last case the adhesive behaves like the non-irradiated one!

3M – Comparison Max value = 4.5 Mpa -First two equals! -Last case the adhesive is like the non-irradiated one!

Fastelfilm – No irradiation F force (N)= σ * 100 D displacement (mm)= ε * 10 -Non repeatable! -Different behavior in this two cases (????)

FastelFilm F force (N)= σ * 100 D displacement (mm)= ε * 10 First case is more rigid then it starts to melt under higher radiation!!!

FastelFilm – F force (N)= σ * 100 D displacement (mm)= ε * 10 Tool broken: piece of silicon got stuck inside!  re-machined the groove

FastelFilm – Comparison Max value = 3.6 Mpa The adhesive is thermoplastic, at high radiation it melts! (what’s the temperature inside the vessel during the irradiation???)

Araldite – No irradiation F force (N)= σ * 100 D displacement (mm)= ε * 10 New scale for the graphs! Values higher than for the other adhesives!!! Always tested the silicon!!!!

Araldite F force (N)= σ * 100 D displacement (mm)= ε * 10 The glue seems burned!!

Araldite – Comparison Max value = 26 Mpa The values are higher than before! We cannot say anything about the glue! (it is more resistant than silicon!!!!)

Single Anodic bonding – Shear Test – Wafer CMI TEST Temperature: 350 °C Voltage: 1000 V Silicon Pyrex Na 2 O Si XX X Cleaning only with Plasma O 2

Single Anodic bonding – Shear Test – Wafer CMI TEST 20483