quench heater procedure check at cold mass assembler premises
DESCRIPTION
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 PresentationTRANSCRIPT
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QUENCH HEATER PROCEDURE
CHECK AT COLD MASS
ASSEMBLER PREMISES
Andrea Musso /1 Section meeting May 12th, 2005
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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)
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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.
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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
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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
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Some pictures….Alstom (1)
An inclusion was found and the quench heater put in stand by
Visual inspection
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Some pictures….BNN (1)
Soldering omega’s
Cleaning
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Some pictures….Alstom (2)
Connecting the wires between quench heater
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Some pictures….Alstom (3)
Soldering omega’s
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Some pictures….BNN (2)
Connecting the wires between quench heater
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Some pictures….BNN (3)
Quench heaters are fixed on heads with polyimide tape
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Some pictures….Ansaldo (1)
Quench heaters are fixed on heads with polyimide tape….
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Some pictures….Ansaldo (2)
…and resin before collaring….
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Some pictures….Alstom (4)
…Quench heaters are fixed on heads with polyimide tape
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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