QUENCH HEATER PROCEDURE CHECK AT COLD MASS ASSEMBLER PREMISES

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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