# Presentation: 359845

## LARP Magnet R&DSummary 

**S. Gourlay for the LARP Magnet Collaboration**

## US LARP Magnet Program

**US LARP Magnet Program**

**Large aperture, Nb****3****Sn Quadrupoles for LHC Upgrade**

- 90 mm
- > 250 T/m

- High Performance
- Conductor Development

- Length
- Scale-up

## Status and Achievements

**Collaboration established**
**Excellent progress on all major activities**
**Technology Quads (TQ)**
**Length Scale-up**
**Materials**

**Model Magnet R&D**
**TQS01 (Test in progress)**
**TQC01 (August)**
**TQC02 Fab and test by end of CY06**
**Supporting R&D**** **
**SQ-01 completed in FY04 and retested in FY05**
**SQ-02 recently retested at FNAL @ 1.8K**
**Long Racetrack (LR) underway**
**Materials**
**Characterization of strand, cable and procurement**
**Design Studies**
**Relevant studies underway**

## Materials

**Workhorse strand established**
**RRP 54/61 (successful industrial and lab use)**
**Vigilant monitoring and evaluation required**
**Still an R&D material**
**Conservative acceptance criteria established (I****s**** > 2 X op)**
**Parallel development of ultimate material (important)**
**Core programs**
**SBIR**
**Conductor Development Program**
**Continued R&D**
**Measurement techniques (extracted strands)**
**Cabling studies/parameters**
**Cable testing (I****c**** and strain degradation)**

## Technology Quads

**Excellent first result**
**World’s highest gradient/bore (field) quad**
**Truly collaborative effort**
**Analysis and data unprecedented**
**Some deviation from original plan – but we expected that**
**Evaluate next step in TQ**
**Long Quad (LQ) start in FY07**
**High Gradient Quad (HQ)**
**Phase in as resources allow**
**Important to determine limits of technology**

## Length Scale-up

**Length Scale-up**

**Long Racetrack (LR)**
**Key to early start**
**Focus on *****coil***** fabrication issues and tooling design**
**Approach shell structure scale-up**
**Lab integration**
**Incurred delays not critical (yet)**
**Design nearly complete**

## Proposed New Tasks and Scope

**New Tasks for FY07**
**Long Quadrupole (LQ)**
**High Gradient Quadrupole (HQ)**
**Engineering design**
**Additional Long Racetrack coil**
**SQ-03**
**Rad-hard insulation**
**Cable evaluation**
**Performance expectation**
**“****short sample”**
**Strain degradation**
**Small racetracks (SRK), NHMFL, FRESCA**

**Proposed new scope**
**Rapid-cycling Nb****3****Sn dipole – TAMU**
**Fast-Ramp - BNL**
**Measurement system**
**Design study**

## Risk and Risk Management

**LARP Magnet Program is very **
**	****ambitious, but . . .**
**Based on success of core programs**
**Focus on the goals**
**Effective use of resources**
**Technical**
**Materials**
**Extensive materials evaluation program**
**Priority on delivery of “workhorse” material**
**Parametric studies**
**Sub-scale magnets for early start on technical issues**
**Increase number of tests**

**Schedule**
**Program planning takes into account some unforeseen delays and difficulties**
**Multiple targets**
**Early schedule for completion**
**Can recover additional schedule slip by accepting additional risk**
**Reassess in mid-FY06**
**Modify as necessary**

## Milestones

**TQ Prelim**

**LRS-01**

**LRS-02**

**Structure decision**

**LQ-01**

**HQ-01**

## Assessment Metric

**180 T/m**

**200 T/m**

**Success**

## Summary

**An excellent program has evolved over the past couple of years**
**We have the tools and resources for success**
**Off to a great start!**