Beam tube and Material SamplesFor Crab Cavity Project

Tests Results

P.Freijedo

Date: 13.03.2015

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Material samples provided by Niovawe:• N22: Niobium Thickness 4mm to cavity:

Results of tensile tests in rolling and transverse direction:Rm= 196.9 +/- 2.9MPa / 191.9 +/- 1.3 MpaRp0.2= 79.4+/- 3.9MPa / 71.5 +/- 2.6 Mpa

A(%)=62.4+/- 4.0% / 61.2 +/- 2.5%

• N23: Niobium-Titanium Thickness 25mm to beam tube:Results of tensile tests in rolling and transverse direction:

Rm= 551.1 +/- 29.5MPa / 542.0 +/- 23.4 MpaRp0.2= 545.4+/- 30.4MPa / 540.6 +/- 24.2 Mpa

A(%)=17.0+/- 0.8% / 16.1 +/- 3.2%

• H8: Niobium Rod Thickness 16mm to beam tube:Results of tensile tests are NOT satisfactory:

Rm=173.3 +/- 2.4MPaRp0.2=168.1 +/- 4.3 MPa

A(%) = 3% +/- 2.5%

CONCLUSION: The Rod material is not annealed

https://edms5.cern.ch/document/1493400/1

Test Reports here:

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• The following tests have been performed to beam tube:

- Ultrasonic test by Immersion:The results are satisfactory

- Leak Test before and after thermal shocks in liquid nitrogen (five times):The results are satisfactory

• The following tests are on-going:

- Control dimensional

- Metallographic test

Beam tube for Crab Cavity