AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
LBNL Superconducting Magnet Program
Presentation to the HEPAP Sub-panel onAdvanced Accelerator Research and Development
Fermilab, February 15, 2006
Gian Luca Sabbi
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Goals
High-field arc dipoles:• Key enabling technology for high-energy hadron colliders• Maximum potential for new discoveries in HEP
Develop and establish the technologies associated with high-fieldsuperconducting magnets, in order to provide cost-effective optionsfor the next-generation high energy physics accelerators.
1.
Apply our expertise towards the goals of the HEP community.2.
Large Aperture IR Quadrupoles & Dipoles for LHC:• HEPAP: LHC luminosity upgrade is “absolutely central”• LBNL prototypes demonstrated its feasibility
⇒
⇒
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Organization
Program Head(Gourlay)
Magnet Development
(Sabbi)
MaterialsDevelopment(Dietderich)
Design & Analysis(Caspi)
Advisory(Lietzke)
Fabrication(Hannaford)
Testing(Lietzke)
Expertise “from melt to magnet”
43.1Testing21.212.6Total
4.82.1Fabrication5.32.4Design & Analysis4.73.1Materials development2.41.9Management & Admin
Total FTECore FTEFunctional Area
Distribution by functional area (Total FTE)Distribution by category (Total FTE)
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Funding
k$k$Unit17652510Labor
60258Operations0230Infrastructure
421447Procurements374465SC Contracts
26203910FY06 Total
HFM + CDP OtherFY06 by type
• Core funding level was flat for the last several years, no major changes expected • Distribution is 60% long term R&D (100% of AARD); 40% medium term R&D• In past years, the group has also had significant involvement in short term R&D • Support of individual functional areas is close to a minimum “critical mass”• Prevent loss of expertise due to retirement of senior members ⇒ post-docs, PhDs• Pass-thru contracts (superconductor procurements for CDP and LARP): 840 k$
HFM = High Field Magnet Program (AARD Core Funds); CDP = Conductor Development ProgramOther = LARP (US LHC Accelerator Research Program) and WFO (small contribution in FY06)
0500
10001500200025003000350040004500
HFM + CDP (60%) Other (40%)
k$ SC contractsProcurementsInfrastructureOperationsLabor
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Accomplishments
Critical contributions to all aspects of high field magnet technology:• Engineering properties of superconducting wires • Cabling of traditional and advanced wires• Pioneered the “wind-and-react” coil fabrication technology• New concepts for mechanical support and magnet assembly • Advances in modeling capabilities and diagnostic tools
⇒ Pushing the technological limits of accelerator magnets Impact on the HEP community:
• Medium term: LHC luminosity upgrade, ILC Beam Delivery • Long term: Design options to advance the energy frontier
Service to the scientific community, both within and outside HEP
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
High Field Dipole Models
Cos θ Common Coil Block
D20 (13.5 T) RD3b (14.5 T) HD-1 (16 T)
• Exploring coil and structure design options while pushing the field limits• Complete infrastructure for fabrication and test of short (~1 m) models
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Materials Development
Project Management(LBNL)
AdvisoryBoard
Nat’l LaboratoryGroups
IndustrialCompanies
UniversityGroups
HEP Conductor Development Program
Cable Optimization
60-strand cabling machine
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Integrated Design & Analysis
2D optimizationPKLBLROXIE
POISSON
COILgeometry
CalculationsField and Harmonics
BEND
CalculationsTOSCA, POISSON
CADProE
AutoCAD
ANSYSMagneticStructuralThermal
TESTStrainField
voltage
SAT files
Xsection
3D3D
3D
3D
Viewer
2D
Analytical
Quench
Analysis
Fully integrated modeling environment applied to SQ1, TQ1 design & analysis:
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Advanced Modeling Techniques
Coupled structural-thermal(quench simulations)
3D Structural 3D MagneticEnd pre-load
End gaps
Turn-by-turn
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Technology R&D with Sub-scale Coils
SC CoilSM Dipole SQ Quadrupole
• Cost-effective, rapid turn-around tools for technology development• R&D topics: conductor, cable, mechanics, materials, fabrication procedures • Two-layer “SC” racetrack coils; field range of 9-12 Tesla; fully instrumented• Testing in both dipole (SM) and quadrupole (SQ) configurations
Strain Gauges
Spot Heater
Voltage Taps
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Bladders & Load Keys
Island/Pole
25 mm Bore Plate
Load Pads
RD3b Common Coil Magnet
New Structure and Assembly Concept
Pressurized Bladders
RD3b Magnet Assembly and Cool-down
Fx = 12 MN/m @ 14.7 T
Support by aluminum shell over iron yoke; assembly with pressurized bladders
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
HD1 Quench Diagnostics
HD1 Training Comparison
13.0
13.5
14.0
14.5
15.0
15.5
16.0
16.5
17.0
0 5 10 15 20 25 30Training Ramp #
B(T
)
0.72
0.75
0.77
0.80
0.82
0.85
0.87
0.90
0.92
0.95
0.97
1.00
I/Iss
HD1HD1bIss.avg
Average Short-Sample
Training Quench #2 Plateau Quench #14 Quench #14 (-16A) Quench #14 (-10A)
Flux-Jump
MotionMotion
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Next Step: HD2
Ti Stainless
Bladder
Key
G10 Cable x 2
Ti Stainless
Bladder
Key
G10 Cable x 2
Parameter Unit HD1 HD2 Clear bore mm 8 35 Coil field Tesla 16.1 16.1 Bore field Tesla 16.7 15.3 Max current kA 11.4 15.2 Stored Energy MJ/m 0.66 0.89 Fx (quadrant, 1ap) MN/m 4.7 5.9 Fy (quadrant, 1ap) MN/m -1.5 -2.7 Ave. stress (h) MPa 150 140
• 15 Tesla, 35 mm clear bore• Simple coil configuration• Geometric harmonics: 10-5
• Suitable for HF cable testingCable sample holder LHC Energy Upgrade?
HD2 Features & Applications
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
High Field Accelerators & Magnets
10 11 12 13 14 15 16 17 18 T
LHC Upgrades
VLHC(2-stage)
VLHC(HF)
MUONCOLLIDER
RD3c (2002)
D20(1996)
RT1(1999)
RD3b(2001)
HD1a/b(2003/2004)
HD2(2006)
Nb3Sn HTS
HD1c(2007)
TQ(2006-07)
HQ(2008-09)
Operating
Maximum
(in progress)
(completed)
SQ(2004)
LARP
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Matrixed Projects (WFO, LDRD, etc.)
HTS Cable (Showa) Nb3Sn Undulator TAMU Test
Open-air NMR Fusion Quads
AARD, February 15, 2006 Gian Luca SabbiSuperconducting Magnet Program
Summary
Core program:
• Expanding the accelerator magnet design toolbox• Improved understanding of magnet behavior• Developing dipoles suitable for an LHC doubler
LARP:
• Critical contribution to HEP in the near term • Effective use of the program expertise and resources