VELO RF box status at Nikhef Report at the Meeting for new VELO RF foil development Tjeerd Ketel, Erno Roeland a.o., Nikhef 29-03-2011 1 Tjeerd Ketel, Nikhef
VELO RF box status at Nikhef
Feb 23, 2016
VELO RF box status at Nikhef. Report at the Meeting for new VELO RF foil development Tjeerd Ketel, Erno Roeland a.o ., Nikhef . Activities in 2010. After a failure in February 2010 to produce a complete leak-tight RF box, we decided to produce a flat box to save on prepared foils. - PowerPoint PPT Presentation
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Tjeerd Ketel, Nikhef 1
VELO RF box status at Nikhef
Report at the Meeting for new VELO RF foil development
Tjeerd Ketel, Erno Roeland a.o., Nikhef
29-03-2011
Tjeerd Ketel, Nikhef 2
Activities in 2010• After a failure in February 2010 to produce a complete leak-tight
RF box, we decided to produce a flat box to save on prepared foils.– Longer foil extension (4 mm) for welding.– Improvements welding machine.– More flanges (4) milled at the VU.– Inventory of the side foils.
• More manpower promised in May.– New welding machine. Optimization to avoid tiny cracks (leaks) at long
welds.• Flat box is tested in October. It leaks at all corners!
– Corner tests started.– First additional foil pressed at Nikhef.
29-03-2011
Tjeerd Ketel, Nikhef 3
Activities in 2011
• Prepare side foils for 10 boxes (40 in total).– Ready minus 2 side foils.
• Prepare 7 left and 7 right RF foils.– Still 3+3 to be pressed.
• Produce 6 test cubes (48 corners).– Improvements in first welds.– Improvements in repair, including AlSi addition.
• Produce complete RF boxes.– First in preparation.
29-03-2011
Tjeerd Ketel, Nikhef 4
The test cubes
1 2 3 4
5 6
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Tjeerd Ketel, Nikhef 5
Cubes 1-6• Cube 1:
– Test of flat foils, without good cooling contact.• Cube 2:
– 12A. All corners bad. Both solder and weld added. Repair failed• Cube 3:
– 17A. All corners bad. Little cracks. Repairs failed.• Cube 4:
– 19A. Three corners bad. Weld added. One repaired.– Continue with 19 A for the rest.
• Cube 5.– One corner bad. Welded again. Still small leak.
• Cube 6. – Four corners bad. AlSi added. Three repaired. One small leak.
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Tjeerd Ketel, Nikhef 6
Cubes 5-6
29-03-2011
Tjeerd Ketel, Nikhef 7
RF box
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Tjeerd Ketel, Nikhef 8
Conclusion and outlook
• Cube tests improved the welding quality and showed repair with welding AlSi wire.
• Start now with a real box.• Improve on repair simultaneously.• Production rate of one box per month,
foreseen but not yet realized.
29-03-2011
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