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CLIC TD26CCR1 prototype fabrication

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Presentation on theme: "CLIC TD26CCR1 prototype fabrication"— Presentation transcript:

1 CLIC TD26CCR1 prototype fabrication
Daniel Gavela, Fernando Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

2 Furnace qualification Disc fabrication Fabrication plan
Index Furnace qualification Disc fabrication Fabrication plan CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

3 Furnace qualification
Thermal cycle in the furnace with witness copper discs in hydrogen atmosphere (few mbar pressure) SEM qualitative contamination analysis before / after the cycle One candidate furnace close to the machining company did not pass the qualification due to apparition of Mg and Ca particles Ongoing furnace qualification with a second candidate CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

4 Fabrication of discs (DMP)
Three trial disks already fabricated (#2, #13 and #2) on a high precision machine with diamond tools. The process is aimed to reduce costs and allow industrialization. Iris produced by milling with very low roughness. No step around the iris. Photos courtesy of DMP CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

5 Fabrication of discs: dimension control
Machine blocked during turning. Non-recurrent error. Is it a systematic error in the machine? See next slide Due to misalignment between milling and turning CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

6 Fabrication of discs 2nd trial disk (#13) Profile displaced:
about 2 μm Trying to understand if it is a systematic deviation Shape is within tolerances Only problems with positioning CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

7 Fabrication of discs 3rd trial disk (#2)
Waveguide nose shape is fine, slightly off-position Iris shape tolerance is fine, but 0.3 micron off-position CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

8 Fabrication of discs Leitz Infinity 3-D coordinate measurement machine uses ultra-low force gauge The depth of the deformation is about 80 nm Measurements on series discs under discussion, likely the iris profile will not be measured CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

9 Fabrication plan Discs:
Two more trial discs aiming to solve the pending problems with dimension tolerances. Series fabrication of 26 discs for one accelerating structure. Production of the other parts: couplers, ports Bonding tests with discs with simplified geometry (not high precision at the iris and waveguides, only at bonding surfaces). CLIC TD26 CC prototype fabrication. F. Toral (CIEMAT) 10th International Workshop on Breakdown Science and High Gradient Technology Valencia (Spain). 15/6/2017

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