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