Transcript Short Model Coils Simon Canfer October 2007

Short Model Coils
Progress at RAL
October 2007
1
Project scope
Progress report
Future work
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STFC SMC Scope
Design and manufacture of
– 2 copper “dummy” racetracks
– 2 Nb3Sn racetracks
•Based on the Berkeley design
– with added spacers to ensure peak field is in the straight
– Conventional insulation system (glass+organic matrix) –tape developed
with JPS Glass
– Including instrumentation - voltage taps – spot heaters – based on LBNL
•Coil Component design and procurement
– Poles and spacers + insulation materials
•Tooling
– Winding, Reaction, Impregnation
•Manufacture
– Coil winding in collaboration with Cern
– Reaction – subcontracted to Culham
– Impregnation at RAL
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Excludes
Coil force support structure
– design or manufacture
Testing
– facilities
4
Progress since July
Design and manufacture of island, spacers (P Ford)
Soldering trials (G Ellwood)
Insulation development (S Canfer)
MT20 papers and posters
– Mechanical design of the Next European Dipole oral
– Insulation development for NED poster
– Helical dipoles poster
First winding trial at CERN
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SMC design and manufacture – P Ford
Pro-E model of the SMC
has been constructed
Rapid prototyping has been
used to test fits
Winding and heat treatment
tooling design is in progress
Step by step procedures for
winding, reaction and
impregnation are being
developed
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Winding Trials
First trials made October 2007
•Support from CERN technicians
•Basic system operated
•Modifications to
– pole lead-in turn
– clamping
•Next trials
– ~ 2 weeks
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Soldering jig with temperature controller –
George Ellwood
To be used for soldering Nb3Sn tails to NbTi leads
Develop procedures and qualification tests
Need to agree and do joint qualification tests – test of joint
samples at Cern ? -
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Magnet Matrix Mechanical properties
SMC mechanical analysis and test programme requires
magnet matrix data
–
modulus, integrated thermal expansion, Poissons ratio
This will also be essential for the next steps in design
of the large aperture magnets proposed for FP7 IA
Currently based on literature and previous stack test
measurements with different cable size
We plan to measure these properties in a cable stack
test programme
–
Also we will look at evaluating the behaviour of NED PIT cables
during the reaction phase under different loading conditions –
expansion/contraction, yielding, deformation, stress retention
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Stack test plan
Phase 1: Set up a “stack production bench”
Phase 2: Set up testing with optical extensometer at
77K: Modulus and Poissons ratio.
Phase 3: Study variables- compaction during reaction,
compressive stress during impregnation, resin variants
Stacks will also be used for thermal expansion
measurement and microscopic examination to
determine cable deformation and insulation glass
content
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Planning
Wind first dummy copper coil
– November 07
Heat treat and impregnate
– December 07 and January 08
Wind first Nb3Sn coil
– March/April 08
Mechanical properties stack tests
– November 08 onwards
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