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EuCARD 2012 Collaboration Meeting Warsaw University of Technology 22 th April 2012 WP-7 / Task 4...
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EuCARD 2012 Collaboration Meeting Warsaw University of Technology 22 th April 2012 WP-7 / Task 4 Very high field magnet • Introduction/objectives/partners • Works done HTS conductors (Bi-2212 & YBCO coated) - characterization HTS solenoids HTS insert design and first implementations • Conclusions & works to do
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Transcript of EuCARD 2012 Collaboration Meeting Warsaw University of Technology 22 th April 2012 WP-7 / Task 4...
EuCARD 2012 Collaboration MeetingWarsaw University of Technology
22th April 2012
WP-7 / Task 4Very high field magnet
• Introduction/objectives/partners• Works done
HTS conductors (Bi-2212 & YBCO coated) - characterization HTS solenoids HTS insert design and first implementations
• Conclusions & works to do
Warsaw University of TechnologyApril 22, 2012
2
Objective, introduction
Construction of an HTS dipole insert (6 T) within a Nb3Sn dipole magnet (13 T)
Motivation: quest for higher fields
Courtesy L. Rossi
Warsaw University of TechnologyApril 22, 2012
3
Objective, introduction
Three subtasks: Specification, characterization and quench modelling
Design, construction and test of solenoid insert coils
Design, construction and test of dipole insert coils
Deliverable: A HTS dipole insert coil constructed (D - M48)
Milestones: HTS conductor specifications for insert coils (R - M12)
Two HTS solenoid insert coils (D - M24)Done
Warsaw University of TechnologyApril 22, 2012
Partners
4
LASA
WroclawUniversity
of Technology
Warsaw University of TechnologyApril 22, 2012
5
Works done
HTS conductors (Bi-2212 & YBCO coated)
Comparison within the context (high Jc & )
Characterizations
Technological implementation
Solenoid coils & connexions
Protection modelling and protection proposal
HTS insert design and first works
Electromagnetic and mechanical designs
Conductor design and first realization
Some mechanical implementation
Warsaw University of TechnologyApril 22, 2012
Characterizations
6
YBCO Blg
YBCO Btr
Blg
Btr
Courtesy J. Fleiter
Warsaw University of TechnologyApril 22, 2012
Jc parameterization
7
The most appropriate fit to describe critical surface of Bi-2212, Bi-2223, Y-123 and MgB2 is the one based on flux creep theory:
,0 1n
irr irrB T B t
0, 1qm p
c irr
CJ B T B b b
B
Where
irr
Bb
B
c
TtT
0C cste
Warsaw University of TechnologyApril 22, 2012
Protection
8
1000
0.5 s
Courtesy T. Lecrevisse250 K
20 K
0.1s
0.20 s
Pancake30 series turns
365 MA/m2 (Ø ≈ 100 mm)
0.3 J in 100 ms
Courtesy A. Stenvall
Warsaw University of TechnologyApril 22, 2012
Solenoids realized
9
Coil strongly instrumented(heaters, voltages tapes,Cernox®, …)
Warsaw University of TechnologyApril 22, 2012
10
Double pancake
Double pancake without connexion between the two pancakesCu mandrel(conduction cooling)Øi = 75 mm
Tape 4 mmSuperPower®
SCS 4050 tape Kapton®
Warsaw University of TechnologyApril 22, 2012
11
Solenoid test bench
20 T facility
Warsaw University of TechnologyApril 22, 2012
12
Double pancake
Test 4.2 K:• 18 T• 400 A (1000 MA/m2)• 700 MPa (JBR)
Warsaw University of TechnologyApril 22, 2012
13
Layer coil
Test 4.2 K:• 16 T• 400 A (1000 MA/m2)
• 4 layers• 10 serie turns per layer
Warsaw University of TechnologyApril 22, 2012
14
CNRS double pancake sent to KIT
Warsaw University of TechnologyApril 22, 2012
15
CNRS double pancake sent to KIT
Results (4.2 K)•400 A up to 12 T•698 A at 10 T
• Wire broken (730 MPa)
Same results / Grenoble
Warsaw University of TechnologyApril 22, 2012
Instrumented double pancake
16
Heater inside one pancake Numerous voltages taps
Warsaw University of TechnologyApril 22, 2012
Multi pancake instrumented coil
17
Quench simulations
Warsaw University of TechnologyApril 22, 2012
Insert electromagnetic design
SC 12 mm tape (SP)
Cu – 65 µm
SC 12 mm tape (SP)
Cu – 135 µm
Cu – 135 µm
YBCO
Solder
ed
Contact
Contact
Warsaw University of TechnologyApril 22, 2012
Insert mechanical design
Warsaw University of TechnologyApril 22, 2012
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Conclusions
Advances in many fields for HTS inserts Characterizations and scaling laws
Better understanding of the conductors and their
implementation
Successful HTS coils with high performances
A lot of progress about quench modelling
Conductor proposal
EuCARD 2012 Collaboration MeetingWarsaw University of Technology
22th April 2012
Thank you for your kind attention
