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QUENCH HEATER PROCEDURE CHECK AT COLD MASS ASSEMBLER PREMISES. Andrea Musso / 1 Section meeting May 12 th , 2005. Aim of the visits. To verify incoming inspection and installation procedures of the manufacturers To check differences between manufacturers - PowerPoint PPT Presentation
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1
QUENCH HEATER PROCEDURE
CHECK AT COLD MASS
ASSEMBLER PREMISES
Andrea Musso /1 Section meeting May 12th, 2005
2
Aim of the visits
• To verify incoming inspection and installation procedures of the manufacturers
• To check differences between manufacturers
• To point out critical points (eventually)
3
Quench heaters producer’s
• Cicorel (Switzerland)
• C.I.V. (France)
Actually all the stainless steel strips are produced and coated only by C.I.V.
4
Operations before installationBNN
• Visual inspection• Remove oxidation from omega
windows• Cleaning with Acetone• Cleaning the omega’s with
Scotch Britte• Preparing wires• Flux+soldering• Fixing wires with epoxy• Wait+cleaning with foam• Insulating with adhesive
polyimide• Approach to pole and cleaning
with acetone• Positioning on poles
Alstom• Visual inspection• Preparing wires• Cleaning with alcool• Flux+soldering• Cleaning with alcool• Positioning on poles
5
Operations before installation
Ansaldo Superconduttori:
They buy quench heaters already equipped with omega’s and wires; the only
operations they do before installation:
• Visual inspection
• Cleaning with alcool
6
Some pictures….Alstom (1)
An inclusion was found and the quench heater put in stand by
Visual inspection
7
Some pictures….BNN (1)
Soldering omega’s
Cleaning
8
Some pictures….Alstom (2)
Connecting the wires between quench heater
9
Some pictures….Alstom (3)
Soldering omega’s
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Some pictures….BNN (2)
Connecting the wires between quench heater
11
Some pictures….BNN (3)
Quench heaters are fixed on heads with polyimide tape
12
Some pictures….Ansaldo (1)
Quench heaters are fixed on heads with polyimide tape….
13
Some pictures….Ansaldo (2)
…and resin before collaring….
14
Some pictures….Alstom (4)
…Quench heaters are fixed on heads with polyimide tape
15
Some pictures….Ansaldo (3)
Splice between strips
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Conclusions
• The only critical point at the moment is to fix the extremities on coil’s ends; this causes cut on the vertical plane:
– Alstom fixes the extremities since ten magnets because they had a problem of an omega that was displaced and therefore had problems during collaring
– Ansaldo Superconduttori fixes the extremities also with resin; they did a test on two magnets avoiding to fix them and they aim to avoid fixing in the next future
– BNN fixes slightly the extremities, but since our visit the project engineer suggested them to avoid doing it; they accepted the suggestion