New CLIC joint - study status Przemyslaw Lutkiewicz Cedric Garion (supervisor)

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1 New CLIC joint - study status Przemyslaw Lutkiewicz Cedric Garion (supervisor)

2 Przemyslaw Lutkiewicz AT/VAC ; Przemyslaw.Lutkiewicz@cern.ch

3 Existing design concept Przemyslaw Lutkiewicz AT/VAC gasket flange CLIC gasket vs 2 CHF coin

4 Przemyslaw Lutkiewicz AT/VAC ; Przemyslaw.Lutkiewicz@cern.ch CLIC gasket vs 2 CHF coin Joint concept Drawbacks are mainly related with non symmetrical : Large and non constant displacements into gasket aperture Different contact pressure distribution for upper and lower surface of the gasket Trapped volume Problematic in assembly and production 0.25 Lateral profile of the maximum inner displacements Contact pressure between upper gasket surface and flange Contact pressure between lower gasket surface and flange No sealing Sealing No sealing Sealing Contact pressure between upper gasket surface and flange No sealing Sealing Trapped volume Contact pressure near grove No sealingSealingNo sealing Sealing

5 Symmetry Assembled joint Przemyslaw Lutkiewicz AT/VAC gasket flange New CLIC design concept

6  Homogeneous contact pressure – the joint is symmetric type (sexless) Przemyslaw Lutkiewicz AT/VAC ; Przemyslaw.Lutkiewicz@cern.ch  Cheaper production – simple and easy to machine gasket shape and one type of flange  Easier assembly – symmetric, self-placed gasket with additional pins centering joint system  Superior RF properties – smooth flange-gasket-flange transition SYMMETRY NO SYMMETRY New proposalOld design 2) 3) 1) 2) 1)Female flange 2) Gasket with moderate shape 3) Male flange 1)One type of flange 2) Gasket with simple shape self-placed gasket self-placed gasket + Pins centering joint system 0.25 mm 0.15 mm Flange Gasket > 0.1 mm Flange Gasket

7 Geometrical parameters Przemyslaw Lutkiewicz AT/VAC Alpha (Q 1 ) Beta (Q 2 ) thickness Initial position flange gasket

8 Przemyslaw Lutkiewicz AT/VAC ; Przemyslaw.Lutkiewicz@cern.ch The leak tightness level Joint at the experiment

9 Przemyslaw Lutkiewicz AT/VAC Displacement into the aperture

10 Przemyslaw Lutkiewicz AT/VAC ; Przemyslaw.Lutkiewicz@cern.ch With width like old design With width like 1/3 of old design

11 Przemyslaw Lutkiewicz AT/VAC ; Przemyslaw.Lutkiewicz@cern.ch With width like old design With width like 1/3 of old design