# Presentation: 091381

- Superconducting Magnet R&D Program
- LARP Collaboration Meeting
- Port Jefferson, NY
- September 16 – 18, 2003
- Stephen A. Gourlay

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Outline

- Magnet Program Goals and Priorities
- LARP Requirements and Issues
- R&D Topics
- Program Strategy and Structure
- Initial Tasks
- Base Program Support and Integration
- Goals for the meeting
- FY04 Program

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## LARP Magnet Program

- Develop Magnet Technology for LHC Luminosity Upgrade
- Enhance physics opportunities at the LHC
- Provide tools to AP for optimal IR design
- An ambitious program focusing on Nb3Sn
- Large-aperture quadrupoles
**Required in all IR upgrade scenarios under consideration**
- Large-aperture, high-field, beam-separation dipoles
**Required in most IR upgrade scenarios under consideration**
- Production-ready IR component designs by 2012

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Ancillary Benefits

- Extend US expertise in high–field accelerator magnets
- Represents the first large-scale use of Nb3Sn in an accelerator
- Advances the enabling technology for the next generation of hadron colliders
- Extend collaborative environment between national lab programs
- Develop world-wide collaboration on high-performance magnets
- CERN, ESGARD, KEK, EU, etc.
- Workshop on Advanced Accelerator Magnets (WAAM)
- Superconducting Magnet Collaboration Network

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

**Notes:**
WAAM – another way to track LARP progress AND include a wider range of collaborators
Program enforces discipline to develop required technology by furnishing accelerator ready designs.
This opportunity is exactly what we have been working toward. It’s why we get up in the morning and go to work. (aside from the fact that we have fun doing this)
To have an opportunity to apply the technology we have worked so hard to develop. Granted, we have a long way to go, but this is the place to start.
This is not an excuse to expand the US programs. It is the pay-off for the support DOE has put into the programs. This is the opportunity to reap the benefits.

## Fundamental Requirements and Issues

- High fields/gradients
- Large aperture/optimized FQ
- High radiation environment
- Program must address
- Technology development/fabrication techniques
- Field reproducibility
- Length issues
- Field quality reproducibility

- Issues derived from requirements:
-        	Mechanical support structures
-        	Coil Geometries
-        	Quench Protection
-        	Heat transfer
- 	Materials
-        	Optimal IR designs

- Nb3Sn

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

**Notes:**
Large aperture is good for luminosity, field quality, minimizing heat load and radiation damage

## Materials R&D Topics

- Conductor
- Nb3Sn
**J****c**
**Magnetization (D****eff****)**
- HTS?
- Cable R&D
- Explore the limits of  Rutherford-type cables
**New techniques**
- Fully keystoned Nb3Sn
- Cores

- Radiation Resistant Materials
- Push to limit of Superconductor
- Then, through IR design, reduce dose to maximize lifetime
- Need to understand limits better
**Nb****3****Sn 500 MGy**
**Organics 1-100 MGy**

**Possible area for university participation**

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

##  Program Strategy and Structure

- Extend and quantify limits on key performance parameters
- Issue-driven program designed to develop an enabling technology base for LHC upgrades

- 2003 – 05
- Technology, simple models
- 2006 – 09
- More complex models (~ 3/yr)
- 2010 – 12
- Accelerator-ready prototype

- Technology Development – LBNL
- Quadrupoles – FNAL, LBNL
- Dipoles – BNL, LBNL

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Program Profile

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## LARP Magnet Program

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Near-Term Approach

- Delayed funding turn-on
- Need to establish basis for future planning
- Highly subsidized, cost efficient start
- Focus on technology development

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Initial Tasks

- Driven by IR options/needs - development of enabling technology
- Need input from AP/CERN on priorities
**What parameters to push. Most benefit to IR design**
**FQ requirements**
- Specifications and Requirements Book
- Working document
- Provide basis for program planning and development
- Program will be challenging . . .
- Develop cost-effective ways to investigate new techniques, materials and designs
- Build on existing Base Program R&D efforts
- Demonstrate that we can achieve operational parameters as soon as possible

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Base Program Support

- Integrate the three US laboratories and include university participation
- Leveraged by
**Existing technology base**
**Intellectual resources**
**Facilities**
- BNL – React and wind Nb3Sn and HTS studies
- FNAL – Wind and react Nb3Sn cos-theta dipoles
- LBNL – High field, Nb3Sn dipoles
- DOE/HEP Conductor Development Program

- Existing Programs are essential
- to the success of LARP

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## BNL 10-turn Coils

- BNL makes 10-turn racetrack coils in modular structure. These modules (cassettes) can be mixed and matched for a variety of experiments in a rapid turn around fashion.
- For example, one can easily change aperture, number of layers, type of magnet, etc.

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## FNAL Magnetic Mirror

- Optimizing magnet technology and quench performance using half-coils and a magnetic mirror:
- Advanced instrumentation
**Voltage taps, spot heaters, thermometers, ****strain gauges**
- Short turnaround time, cost effective
**Bolted skin, same yoke and spacers**
- Can be used to test quadrupole coils, as wellas dipole coils.

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## LBNL Sub-Scale Magnets

- Scaled version of main magnet
- Approx. 1/3 scale
- Field range of 9 – 12 Tesla
- Two-layer racetrack coils
- 5 kg of material per coil
- Streamlined test facility
- Small dewar
- Basic instrumentation
- Can be used by LARP to test, for example,
- Heat transfer
- Alternate conductor insulation systems

**RD**

**SM**

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## LBNL Key and Bladder Technology

- Used in dipole base program for mechanical structure
- Application to quad R&D

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Goals for the meeting

- Joint meeting with AP group
- AP input – preliminary goals and requirements
- e.g. Field quality requirements from injection to operating field/gradient
- Work on details of FY04 activities
- Discussion
- Collaborative plan for FY04 tasks
- Generate FY05 Plan

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## FY04 Magnet Program

- Quadrupoles
- Support Structure R&D
**Labor + most M&S supported by base programs**
- Dipoles
- Mechanical analysis of BNL design
- Heat transfer
**Modeling**
**Measurements via sub-scale model(s)**

- Cable R&D
- Keystoned cable
**Map parameter space, new techniques?**
- Evaluation
**Extracted strand measurements**

- This is all
- technology development!

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## FY04 Labor Breakdown

- Heat Transfer
- Analysis	BNL 0.2 S/E
- Studies	BNL 0.1 S/E,
- 			FNAL 0.1 S/E
- 			LBNL 0.2 S/E, 0.2 D/T
- Dipole
- Design		FNAL 0.2 S/E
- Dipole mechanical structure	BNL 0.2 S/E
- Cable studies	FNAL 0.1 S/E, 0.1 D/T
- 			LBNL 0.1 S/E, 0.1 D/T

-     Labor Summary
- 	S/E	D/T
- BNL	0.5	0.0
- FNAL	0.4	0.1
- LBNL	_0.3__	__0.3_
- Total	1.2	0.4

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## FY04 M&S Breakdown

- Heat transfer studies	LBNL $5k
- Cable studies		FNAL $2k, LBNL $5k
- Quad structure		LBNL	$10k

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Technology Development Proposal

- Rapid, cost-effective start using existing techniques and infrastructure
- Support structure based on LBNL bladder and key assembly technique
- Use existing D20 tooling for 2-layer coils

- Phase Ia – Mechanical Studies
- Phase Ib – 2-layer coil
- 	142 T/m
- 	120 mm bore
- Phase Ic – 4-layer coil
- 	230 T/m
- 	90 mm bore

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003

## Summary

- Delayed funding turn-on
- Need to establish basis for future planning
- Highly subsidized, cost effective start
- Fundamental issues specific to LARP requirements
- Focus on technology development
- Goal: Accelerator-ready design – production start ~ 2012
*A Very Challenging Task*

- S. Gourlay

- LARP Collaboration Meeting September 16, 2003