May 18, 2000 Stanford University Manufacturing Modeling Lab Shun Takai Multipole Magnet Design Selection and Permanent Magnet Material Selection May 18, 2000 Stanford University Manufacturing Modeling Lab Shun Takai

Agenda 1. Motivation 2. Cost-Specification Analysis 3. Conclusion Flow Down of the Product Targets Evaluation of the candidates Selection of the best candidate 3. Conclusion

Motivation Needs for multiple requirements satisfaction NLC Feature (physicists’ requirements) Cost (Government’s requirements) Cost-Specification Analysis highlights design and/or material candidate that satisfies both target specification and target cost

Multipole Magnets Quantity: 1500 quadrupole magnets in Main Linac system 6000 permanent magnet sets Permanent Magnet Set Current Design (Electro-Magnets) Proposed Design (Hybrid Magnets)

Agenda 1. Motivation 2. Cost-Specification Analysis 3. Conclusion Flow Down of the Product Targets Evaluation of the candidates Selection of the best candidate 3. Conclusion

Targets Flow Down Flow down of the product targets to the focus structures

Focus of the Analysis - Structure Focus: (1) Main Linac multipole magnet system (2) permanent magnet used in quads

Specification Flow Down - VOC and Specs

Cost Flow Down Target cost of a structure Calculated relative to the worth of the NLC Target cost of a structure Worth of a structure Worth of NLC = X Target cost of NLC How can I calculate the worth of a structure?

Worth Allocation: Main Systems Worth of NLC is equal to the total worth of VOC 1. Calculate worth of NLC specification from worth of VOC (Translate VOC to NLC specs) 2. Calculate worth of main systems from its contribution to achieve NLC specs (Larger the contribution, larger the worth)

Worth Allocation: Main Systems 1. Calculate worth of NLC specification from worth of VOC (Translate VOC to NLC specs)

Worth Allocation: Main Systems 2. Calculate worth of main systems from its contribution to achieve NLC specs (Larger the contribution, larger the worth)

Worth Allocation: Main Linac Sub-systems Calculate worth of Main Linac sub-systems

Worth Allocation: Main Linac Sub-systems 1. Calculate worth of Main Linac specs from worth of NLC specs (Translate NLC specs to Main Linac specs)

Worth Allocation: Main Linac Sub-systems 2. Calculate worth of Main Linac sub-systems from its contribution to achieve Main Linac specs (Larger the contribution, larger the worth)

Specification Flow Down - Result

Worth Allocation - Result

Target Flow Down - Cost Calculation Target cost of a multipole magnet system 0.9 / 1500 (Worth of a multipole magnet system) 9 (Worth of NLC) Target cost of NLC = X Target cost of a permanent magnet set 0.06 / 6000 (Worth of a permanent magnet set) 9 (Worth of NLC) Target cost of NLC = X

Agenda 1. Motivation 2. Cost-Specification Analysis 3. Conclusion Flow Down of the Product Targets Evaluation of the candidates Selection of the best candidate 3. Conclusion

Cost Evaluation < 1 Select structure candidates with Actual Cost < Target cost or < 1 Cost-Specification Analysis 1 2 3 Relative Performance (Spec = 1) Relative Cost (Target Cost = 1) Best Worst Hybrid Electro Actual cost Target cost Relative Cost

Performance Evaluation Overall performance of each candidate is measured by weighted average of individual spec satisfaction Weighting is relative importance of each spec to the customer material property a material property b Relative Performance = weighting a x + weighting b x + ... spec a spec b Density (Material) = 1 lbs./in.3 Strength (Material) = 4 psi. Relative Performance 1 lbs./in.3 4 psi = 1.5 = x + x 0.5 0.5 1 lbs./in.3 2 psi Density (Spec.) > 1 lbs./in.3 Strength (Spec.) > 2 psi.

Performance Evaluation - Weighting Calculation Weighting of each spec is calculated by relative weight of each spec

Performance Evaluation Select structure candidates with Relative performance > 1

Design Selection of Multipole Magnet System Design candidates: Electro-magnet vs hybrid magnet (Strontium Ferrite)

Material Selection of Permanent Magnet Material candidates: Strontium Ferrite, Sm2Co17, Nd-Fe-B

Trade-Off Analysis Design can be optimized by trade-off analysis of each candidate

Agenda 1. Motivation 2. Cost-Specification Analysis 3. Conclusion Flow Down of the Product Targets Evaluation of the candidates Selection of the best candidate 3. Conclusion

Conclusion Cost-Specification Analysis enables an engineer to select the best candidate that satisfies both specification and cost targets By applying Cost-Specification Analysis to all components and by selecting the best candidate, the final product can satisfy both required feature and cost simultaneously Looking for second application in order to validate this approach

Questions?

Appendix

Relative Performance: Multipole Magnet Systems

Relative Performance: Permanent Magnet

Next Linear Collider (NLC) NLC is a 20-mile long linear collider that smashes electrons and positrons in order to create new particles The goal is to produce 10 times higher energies than the present linear collider (SLC) NLC is consists of three main systems Injection (Beam injection) Main Linac (Acceleration) Beam Delivery (Collision and detection)

Quadrupole Magnets (Quads) Quadrupole magnets are used in order to focus electron and positron beams using magnetic field Without focusing beams, we can not collide beams accurately

Customer Needs Identification (Customer Value Chain Analysis & Priority Matrix) US Gov. is the critical external customer and SLAC physicists are the critical internal customers The priorities of SLAC and the Gov. are different SLAC needs to satisfy both feature and cost USA Nation $&! US Gov. Constraints Optimize Accept ! $&! SLAC $&! $&! $&! ARD-A NLC $&! MML $: Flow of funds ! : Flow of information

Future Study Include lead time to Cost-Specification Analysis Consider availability of each material Trade-off analysis High cost, high performance vs Low cost, low performance

World Permanent Magnet Market

Chemical Component of Permanent Magnets