1. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 1 Magnet R&D for Muon Accelerator R&D Program Goals Proposed Studies Preliminary Effort and Cost

2. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 2 Magnet R&D Program Goals In close collaboration with Accelerator Design: Identify magnet requirements for machine Target the most challenging elements –Enough R&D to establish magnet design viability for muon collider –Identify magnet limitations or need for further R&D beyond 2012 Develop simple cost models for all magnetic elements as part of overall cost estimate

3. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 3 Challenging R&D Magnets Very high field solenoids, up to 50 T DC –Cost effective to build and operate Helical Cooling Channel Solenoids –Complicated 3-D field; Incorporation of RF Collider and IR Magnets –Highest achievable fields: heat and rad. issues Other magnets –Target solenoids, “medium field solenoids”, rapid cycling dipoles…

4. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 4 High Fields Solenoids Machine design would benefit from 50 T ~30 T is present state of the art, resistive hybrids and conceptual designs for 50 T high field Depends critically on conductor materials –Close collaboration with National HTS programs and base program Develop conceptual models Build and test representative inserts to demonstrate technology Present Plan for building full scale prototype in 2013-2015 time frame

5. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 5 Helical Coiling Solenoids Clever concept using transversely offset solenoid rings to make helical dipole/quad 4 coil model in construction as part of SBIR Close coupling between, AP, magnet and RF technologies Use “4 coil” model technology as test bed for magnet technology: coil winding, cooling, high field models (Nb3Sn, HTS) for later stages In 5 year time frame build full scale cryostated demonstration magnet capable of housing RF

6. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 6 Collider and IR Magnets Technologically challenging magnets due to radiation from muon decays Two approaches: open midplane or wide aperture magnet with imbedded absorber to intercept heat R&D plan: Evaluate two approaches, propose baseline design Technological tests including prototyping: take full advantage of collaboration with other R&D efforts over the next 5 years

7. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 7 Other Magnets Rapid Cycling Magnets –Concept to use TeV tunnel for  acceleration –500 Hz, +/- 2 T fields, minimize AC loses Capture Target Solenoids (~20T) –Concept magnet with resistive insert –Explore HTS insert option Medium Energy Solenoids 10-15 T –Nb3Sn Technology –Wide aperture, high current densities

8. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 8 Magnet Cost Models Magnetic elements will be one the cost drivers for the muon collider Real accelerator will use hundreds of magnetic elements -Many will be variations of existing magnets –Others will be extension of “challenging magnets” Using experience from previous and ongoing accelerator design efforts –Develop cost elements base on magnet weight, aperture vs. conductor scaling etc. –Categorize magnets of like design Estimated effort of ~0.1 FTE/year

9. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 9 Preliminary Cost and Effort

10. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 10 SBIR and University Effort Magnet R&D is most efficiently performed at existing national lab facilities SBIR effort, particularly with Muons Inc has played a very important role in developing muon magnet technology –Helical cooling channel –HTS R&D feeds directly into high field solenoids Expect modest contribution from universities for example U. Mississippi

11. MCTF Michael Lamm MUTAC 5-Year Plan Review 22 August 2008 11 Conclusion Magnets will be one of the enabling technologies for the muon collider We present an R&D plan to study key magnetic elements required for a Muon Collider ZDR. Present in 2012 the state of magnet technology Cost models and R&D will be used to develop a cost estimate for a future muon collider. Whenever possible, we will incorporate existing technology and benefit from ongoing accelerator magnet programs, however… It will require a significant effort from the DOE national labs as well as SBIR and University participation.

12. MCTF Your Name MUTAC 5-Year Plan Review 22 August 2008 12 Format of L2 presentations (<10-12 slides) one summary slide of all the elements of your plan elaborate on the elements ~one summary slide of all (major?) deliverables ~one slide on the timeline of the research activities ~one slide on the cost breakdown: each element, each year, M&S and SWF, total if possible - indicate the desired (anticipated) level of involvement of various labs, University groups and SBIR companies