1. LCD solenoid al-stabilized superconductor research status
Stefanie Langeslag
LCD Magnet Meeting
March 16, 2012

2. Al-0.1wt%Ni stabilized conductor process scale-up
Co-extruded Al-0.1wt%Ni characterization plan
Parallel ongoing research

3. Nexans Cortaillod; Extrusion press
Spool with co-extruded conductor

5. Compound lengths Extracted material
Aluminum without cable: ~31.54 meter
Aluminum/Nickel without cable: ~91.95 meter
Aluminum/Nickel with cable: ~14.17 meter
Aluminum with cable: ~ meter
Extracted material
Part of the superconducting cable-free material has been extracted and samples have been prepared for preliminary feasibility tests.

7. Bulk specimen preparation
Composition analysis
Portable spectrometric analysis
PMI Master Pro (Oxford instr.)
Portable Vickers hardness
EQUOTIP
Inductance measurement
Pick-up coil/LCR meter
Bulk specimen preparation
Work hardening
In house rolling (15, 20, 21, 25, 30%)
Partial annealing
CMS 100ºC (145h) ºC (50h)
ATLAS 130ºC (15h)

8. Feasibility Bond quality Work hardening trial RRR measurement trial
Peel-off quality check AlNi vs. Al
Ultrasonic inspection:
C-scanning, pulse-echo immersion
Cross-section reduction
Partial annealing cycle
Work hardening trial
Superconductor functionality
RRR measurement trial
Low resistive Aluminum
Sensitivity

9. Microstructural analysis Chemical analysis
Metallographic analysis
Optical microscopy:
Material flow; homogeneity
Micro-defects
Stabilizer-sc interface
Crystallographic texture analysis
EBSD:
Homogeneity
Grain size
Orientation; lattice defects
Two-phase analysis
TEM:
Second phase distribution
Lattice defects
Spectroscopy
EDS
Impurity pollution (O)
Kikuchi pattern Ni at 20kV, from: Centre de Microscopie Electronique à Balayage et microAnalyse

10. Mechanical properties
Vickers Hardness
Cross-sectional mapping
micro-mapping
various cold-reductions
Extrema macro-testing
Further macro-testing at extrema positions
Reference Al, CMScs & ATLAScs

11. Mechanical properties
Conventional tensile measurements
Production process analysis
Temperature analysis (4.2K & 77K)
Work-hardening analysis
Partial annealing analysis
Compositional analysis
Reference Al, CMScs & ATLAScs

12. Transport properties RRR measurements (at RT & 4.2K)
Production process analysis
Work-hardening analysis
Partial annealing analysis
Compositional analysis
Reference Al, CMScs & ATLAScs

13. Bonding characteristics
Peel-off test
Al residue on Cu
Ultrasonic inspection
Echo amplitude in bonding region
Spectroscopy (EDS)
Diffusion thickness region
Pull-out test
Pre-treatment analysis
Temperature analysis
Cycled cryostat dipping (Ultrasonic inspection)
RT measurement
Compositional analysis
From: Mechanical properties of the CMS conductor, Benoit Cure et al.

14. Timeframe Sample preparation March-June 2012
Extraction from conductor spool
Cold working with rolling mill
Partial annealing according to coil resin curing cycles
Sample manufacturing (before/after hardness mapping)
Measurement & analysis May-December 2012
Microstructural analysis
Chemical analysis
Mechanical analysis
Transport analysis
Bonding analysis

15. Parallel ongoing research
Material research
Micro-alloying
Fiber-reinforcement
Particulate reinforcement
Material treatment research
Precipitation hardening at coil resin curing temperatures
Analytical model development
Transport properties - Mechanical properties relation
Normal zone propagation model
Ongoing on the work of Prof. Yamamoto and his group for ATLAS.
From: Annotated equilibrium diagrams of some aluminium alloy systems, H.W.L. Phillips et al.