Download - Dmitry Gudkov BE/RF/SR 02 December 2009
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Mechanical design of TD24 11Ghz Damped Sealed Accelerating Structure(based on KEK/SLAC design documentation)
Dmitry Gudkov BE/RF/SR
02 December 20091/14
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Product Elements 1
Tuning system elements
Accelerating elements
Vacuum and interface elements
Cooling system elements
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Product Elements 2
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Beam PipeFixed Vacuum Flange
Coupler Assembly With WG90 Flanges
Input Ring Cell
Matching Iris A
Regular Cells
Matching Iris B
Output Ring Cell
Rotatable Vacuum Flange
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Regular Cell Disk Mechanical Design
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Interlocking system of disks position
Min. gap = 0.005 mm (KEK/SLAC – 0.01 mm)Max. gap = 0.0125 mm (KEK/SLAC – 0.04 mm)
Reference for assembly – B (Ø74±0.0025)
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Assembly Sequence
1. Bonding of all cells of the accelerating structure :
Input Ring CellMatching Iris A
Regular Cells
Matching Iris BOutput Ring Cell
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Photo by Juwen Wang (SLAC)
Pressure: 60PSI = = 60 x 6 894,75729 ≈ 415 kPaTemperature: 1035 °C
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2. Coupler Subassembly:
Brazing of two parts of the coupler using brazing shims:Brazing alloy: Au-Cu 25/75Temperature: 1045 B C
Machining brazed assembly for installationof the vacuum flanges:
Brazing vacuum flanges:
Brazing alloy: Au-Cu 30/70Temperature: 1035 B C
Ph
oto
by
SL
AC
Coupler Cover
Brazing Shim
Coupler Body
Assembly Sequence (continuation)
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Assembly of cooling block, caps, tubes:
4 x
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Photo by SLAC
Brazing alloy: Au-Cu 25/75Temperature: 1045 B C
Assembly Sequence (continuation)
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Bonded Stack
2 x Coupler Assembly
4 x Cooling Block Assembly
1 x Beam Pipe
104 x Tuning StudsPhoto by SLAC
Au/Cu Alloy: 35/65Brazing temperature: 1020º C
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Brazing 1
Assembly Sequence (continuation)
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Au/Cu Alloy: 50/50Brazing temperature: 979-983º C
Photo by SLAC
Brazing 2: adding second beam pipe
Assembly Sequence (continuation)
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TIG WELDING*
10/14* - Tungsten inert gas welding
Assembly Sequence (continuation)
Photo by SLAC
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Stud
GuideHummer
Tube
Tuning System
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Tuning System Brazing
1st step: pushing studs to the tuning holeusing special stainless steel pin
2nd step: fastening by wire and special ceramic pins
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Brazing material for tuning stud brazing
1st option: brazing wire ø0.5 mm:
2nd option: Nickel and then Silver plating of the studs:
This plating becomes brazing material.
3rd option: brazing material inside the stud:
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Thanks for your attention!14/14
Used materials:1.SLAC Work Status for the CLIC High Gradient Accelerator Structure R&D, Juwen Wang, CLIC WS 092.CERN production methods, Germana Riddone, CLIC WS 093.Mechanical design of PSI-XFEL X-band structure, D. Gudkov4.KEK, SLAC Accelerating structure documentation5.CERN Accelerating structure documentation
Thanks to: Germana RiddoneAlexander SamoshkinSaid AtiehJuwen WangRiccardo ZennaroAlexey Grudiev
The End